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• Mac OS X Lion (10.7) Drive Encryption

  - by Skoota

  My iMac has two drives (a 256 GB solid-state drive, and regular 2 TB hard drive). The Mac OS X Lion system is installed on the solid-state drive and, like many other users, I have moved my user profile folder onto the secondary 2 TB drive. However, as you may be aware, FileVault 2 on Mac OS X Lion (10.7) only encrypts the system drive. This leaves my data drive (containing my user profile folder, with all of my data) unencrypted. I am aware that work arounds for this issue exist (such as https://github.com/jridgewell/Unlock) but I am not happy with the results since they involve decrypting the data drive on startup using a LaunchDaemon (before any users have logged into the computer) essentially meaning that any user who logs onto the computer will see the unencrypted drive. I would like a method which will only unencrypted the data when an authorised user logs into the computer. As such, is there a way to do one of the following? Encrypt the entire data drive and only decrypt the drive when an authorised user logs into the computer. This would be equivalent behaviour to the Lion FileVault 2 feature, but on a secondary drive rather than the system drive. Encrypt only the user profile folder on the data drive, and only decrypt the folder when the user logs into the computer. This would be equivalent to the behaviour of FileVault 1 on previous versions of Mac OS X? I am happy to pay for a commercial third-party product that provides the required feature(s), but I have not yet been able to find one. Thanks in advance for any assistance.

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• Does ModSecurity 2.7.1 work with ASP.NET MVC 3?

  - by autonomatt

  I'm trying to get ModSecurity 2.7.1 to work with an ASP.NET MVC 3 website. The installation ran without errors and looking at the event log, ModSecurity is starting up successfully. I am using the modsecurity.conf-recommended file to set the basic rules. The problem I'm having is that whenever I am POSTing some form data, it doesn't get through to the controller action (or model binder). I have SecRuleEngine set to DetectionOnly. I have SecRequestBodyAccess set to On. With these settings, the body of the POST never reaches the controller action. If I set SecRequestBodyAccess to Off it works, so it's definitely something to do with how ModSecurity forwards the body data. The ModSecurity debug shows the following (looks to me as if all passed through): Second phase starting (dcfg 94b750). Input filter: Reading request body. Adding request argument (BODY): name "[0].IsSelected", value "on" Adding request argument (BODY): name "[0].Quantity", value "1" Adding request argument (BODY): name "[0].VariantSku", value "047861" Adding request argument (BODY): name "[1].Quantity", value "0" Adding request argument (BODY): name "[1].VariantSku", value "047862" Input filter: Completed receiving request body (length 115). Starting phase REQUEST_BODY. Recipe: Invoking rule 94c620; [file "*********************"] [line "54"] [id "200001"]. Rule 94c620: SecRule "REQBODY_ERROR" "!@eq 0" "phase:2,auditlog,id:200001,t:none,log,deny,status:400,msg:'Failed to parse request body.',logdata:%{reqbody_error_msg},severity:2" Transformation completed in 0 usec. Executing operator "!eq" with param "0" against REQBODY_ERROR. Operator completed in 0 usec. Rule returned 0. Recipe: Invoking rule 5549c38; [file "*********************"] [line "75"] [id "200002"]. Rule 5549c38: SecRule "MULTIPART_STRICT_ERROR" "!@eq 0" "phase:2,auditlog,id:200002,t:none,log,deny,status:44,msg:'Multipart request body failed strict validation: PE %{REQBODY_PROCESSOR_ERROR}, BQ %{MULTIPART_BOUNDARY_QUOTED}, BW %{MULTIPART_BOUNDARY_WHITESPACE}, DB %{MULTIPART_DATA_BEFORE}, DA %{MULTIPART_DATA_AFTER}, HF %{MULTIPART_HEADER_FOLDING}, LF %{MULTIPART_LF_LINE}, SM %{MULTIPART_MISSING_SEMICOLON}, IQ %{MULTIPART_INVALID_QUOTING}, IP %{MULTIPART_INVALID_PART}, IH %{MULTIPART_INVALID_HEADER_FOLDING}, FL %{MULTIPART_FILE_LIMIT_EXCEEDED}'" Transformation completed in 0 usec. Executing operator "!eq" with param "0" against MULTIPART_STRICT_ERROR. Operator completed in 0 usec. Rule returned 0. Recipe: Invoking rule 554bd70; [file "********************"] [line "80"] [id "200003"]. Rule 554bd70: SecRule "MULTIPART_UNMATCHED_BOUNDARY" "!@eq 0" "phase:2,auditlog,id:200003,t:none,log,deny,status:44,msg:'Multipart parser detected a possible unmatched boundary.'" Transformation completed in 0 usec. Executing operator "!eq" with param "0" against MULTIPART_UNMATCHED_BOUNDARY. Operator completed in 0 usec. Rule returned 0. Recipe: Invoking rule 554cbe0; [file "*********************************"] [line "94"] [id "200004"]. Rule 554cbe0: SecRule "TX:/^MSC_/" "!@streq 0" "phase:2,log,auditlog,id:200004,t:none,deny,msg:'ModSecurity internal error flagged: %{MATCHED_VAR_NAME}'" Rule returned 0. Hook insert_filter: Adding input forwarding filter (r 5541fc0). Hook insert_filter: Adding output filter (r 5541fc0). Initialising logging. Starting phase LOGGING. Recording persistent data took 0 microseconds. Audit log: Ignoring a non-relevant request. I can't see anything unusual in Fiddler. I'm using a ViewModel in the parameters of my action. No data is bound if SecRequestBodyAccess is set to On. I'm even logging all the Request.Form.Keys and values via log4net, but not getting any values there either. I'm starting to wonder if ModSecurity actually works with ASP.NET MVC or if there is some conflict with the ModSecurity http Module and the model binder kicking in. Does anyone have any suggestions or can anyone confirm they have ModSecurity working with an ASP.NET MVC website?

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• Setup Version Control on Dreamweaver

  - by John Isaacks

  I have a win computer on the Network called WIN2K8FS1 I have TortoiseSVN on a win computer and when I go to checkout a repository with Tortoise it asks me for the URL of the repository. I put in: file://WIN2K8FS1/Media/SVN_repo And it creates the working copy. I am trying to setup Dreamweaver CS5 to work with subversion. I create a new site and I go to the Version Control tab and it asks for a lot if info. First is Access. I choose Subversion since that is the only option Second is Protocol. Not sure which I need so I go with HTTP? Third is Server Address. I am assuming this is the name of the computer with the repository so I put in \\WIN2K8FS1\ Fourth is Repository Path. I put in /Media/SVN_repo Fifth is Port which I leave default to 80 Then it asks for user name and password. I never set one up for anything so I put in my domain username and password. I click test and it tells me: Server and project are not accessible! I am not sure what I am doing wrong. I am not the server admin but I did create the repository and have access to it via Tortoise. So I am not sure what I am doing wrong in Dreamweaver.

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• How to burn a data DVD in Windows XP

  - by SabreWolfy

  I am trying to burn a data DVD (DVD+R) in Windows XP SP3 on a Dell desktop computer. The computer has a licensed copy of Nero 6.3. Nero indicates that an update to version 6.6 is available, but after following the link provided, it redirects me to the Nero website to purchase the upgrade. I'm not interested in doing this. After creating a project in Nero 6.3, inserting a blank DVD+R and trying to start burning the data DVD, Nero indicates that I should insert an appropriate disk into the drive. It does not seem to detect the blank DVD+R. I downloaded infrarecorder and cdrtfe from Sourceforge. Neither of these programs worked either. They both indicated that I should insert the correct media, with cdrtfe saying there is no disk in the drive. I tried with another blank DVD +R with the same effect. I inserted a CDR containing data into the drive and the Windows read read this CDR without a problem. I have no reason to believe that the drive is faulty. I am aware that Windows XP itself is not able to burn DVDs. However, it seems that three third-party software programs are not able to burn a data DVD in Window XP. The specifications provided in Nero indicate that DVD+R is compatible with the drive. How can I burn a backup data DVD in Windows XP?

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• Experiences in Upgrading from Exchange 2003 to Exchange 2010

  - by gWaldo

  I'm currently running Exchange 2003 SP2 Cluster on a Server 2003 AD Forest (in native 2003 mode), and we beginning to plan the upgrade to Server 2008 AD and Exchange 2010. We have two main sites, one middle-sized office, and a couple of smaller sites which have DCs (which may be RODCs after the upgrade). Currently all of our Exchange cluster is in my main site, but we are considering using the new datastore paradigm for load-balance/failover at the other large site, but this is not set in stone. Right now we are in the information-gathering and planning phases. I am looking for input of any gotchas experienced while performing either upgrade, but especially the Exchange upgrade. Gotchas? What surprised you? What wasn't documented? What said one thing but was misleading? (Confusing either in content or severity.) What is great or horrible about the new system? What worked well? What worked poorly? If you were to do it over again...? (I know that this isn't so much a question that can be definitively answered, but I'm happy to reward insight and useful resources (not the Microsoft documentation, but Blogposts are welcome) with upvotes.) UPDATE A couple items of note: -We are not currently using OWA (currently only the admins), but it may become more of a consideration with iOS devices. -We do have a small number of Blackberries in the environment (< 10%). -In addition to the standard Exchange connectors, we have a third-party connector for Captaris RightFax integration.

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• Ways of marking a total match

  - by user331898

  I have two columns of matched data. One column contains the ID and the other column contains if there was a match(1) or no match(0) with that ID. There would be times when the all rows with the same ID will have all matched values of 1 and there would times where there were a mix of 0 and 1. I would like a third column to indicate where I have the same ID and all matched values are 1. Sample of what I have below column number and title of column: COLUMN 1: ID COLUMN 2: Match=1,No Match=0 1 1 1 0 2 1 2 1 3 0 3 0 3 1 This is what I would like: COLUMN # & TITLE COLUMN 1:ID COLUMN 2: Match=1, No Match=0 COLUMN 3: All ID Match & Match=1 1 1 N 1 0 N 2 1 Y 2 1 Y 3 0 N 3 0 N 3 1 N Is there a formula or way in excel 2010 that would make this possible? I would still like to keep the rows intact. Appreciate your help. Thank you in advance.

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• Are there any custom keyboard available for laptops

  - by Ahe

  My work laptop is a HP elitebook 8560w which I mainly use for programming. Usually I have a external keyboard but recently I have been working out of office and therefore have been using the laptops own keyboard. One thing has really started to bug me. The keyboard layout of this 15.6" laptop contains numpad but the arrow keys are really bad (too small). Also when programming, I really miss a standard inverted T-arrow keys and the home/end/PgUp/PgDn buttons. Then it occurred to me; I would rather give up a numpad than a standard arrow keys. (The keyboard real estate in 15.6" laptop would allow this, and I really have to agree with Jeff Atwood here http://www.codinghorror.com/blog/2009/02/have-keyboard-will-program.html) Which brings me to my question. Do any laptop manufacturers make custom keyboards for their laptops or is there some third party manufacturer who could supply these kind of special keyboards? Quick googling on this doesn't give any meaningful results. Looks like that I have to carry an external keyboard with me if someone here can't give any pointers.

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• Tracking down source of duplicate email messages in Outlook / Exchange environment

  - by Ken Pespisa

  I have a few users, who are also Blackberry users, that occasionally have duplicate emails generated from their "mailbox". I put mailbox in quotes because I'm not exactly sure where the duplicates are created. One of these users is in non-cached mode, and the other is in cached mode, and both experience the problem. In fact, the non-cached mode user was originally experiencing the problem while in cached mode, and I made the switch a few weeks ago to attempt to solve the problem. Today I discovered the issue still exists. I'm not sure if the fact that they are blackberry users could be causing the problem at all. I don't see how, but felt I should mention it anyway. Does anyone have ideas on how I might begin to troubleshoot this? I can see in the non-cached user's mailbox "Sent Items" that the message was sent only once. I confirmed the message does not state that there was a conflict and in fact that makes sense because they are in non-cached mode. On the server, we have a mail journaling feature turned on for our third-party mail archiving system, and I can see that that system sees two sent messages. And likewise, the recipient does in fact have two messages in their inbox with consecutive message IDs ([email protected]) and ([email protected]). It would seem to me that the duplicates are generated on the client, but is there a way to tell for sure?

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• Collect temperature and fan speed with munin from Windows 7 PC?

  - by mfn

  Hi, I'm quite fond of munin and using it also at home to monitor my PCs. What was super-duper easy under Linux is pretty much unsolvable for me under Windows: I'd like to monitor CPU and Motherboard temperatures as well as fan speed. On Linux I'm using lm-sensors and the plugin for munin was basically there. I access already some information from my Windows machine via SNMP (disk space, CPU usage, memory usage); the graphs are simple as is the information exposed via SNMP, but they do their job. But when it comes to temperature and fan speed I'm running against a wall. My research so far resulted in that Windows does not by default provide out of the box ability to retrieve temperature/fan speed data. Third party applications are necessary which have know-how how to communicate with the Motherboard chips. The best I cam up with is that SpeedFan exposes a shared memory interface and there exists a library which hooks into Windows SNMP facility and bridges over to SpeedFans shared memory interface; it's called SFSNMP (site currently down). Unfortunately the library doesn't work, there's a bug report at SpeedFan open about it, but it's currently not moving (although the SFSNMP author is active there) . So, unless that's going to work like anytime soon, are there any alternatives? I'm not found of buying any software to get that feature, given that I take it as granted that my system exposes me the information to properly monitor it, but anyway don't just not answer because of this.

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• Ubuntu karmic, chroot, Ubuntu server 8.04 LTS and Plesk

  - by morpheous

  I am pretty new to the Linux environment, and although I have been using Ubuntu Karmic desktop for development work, I have always prefered the GUI tools and very rarely use the terminal. I am about to launch a site (a VPS) which will be running Ubuntu server 8.04 LTS and Plesk. I want to install both the server (8.04 LTS) and Plesk in a 'chroot' on my Karmic desktop. I also want to test install some packages I have written for the server, and generally familiarize myself with the environment before I signup to the hosting service. I will be running a streamline server (no GUI), with only the following software: PHP Python mySQL PostgreSQL Apache Plesk Third party packages I developed In terms of mail, I think the hosting provider provides a mail service, so I dont know if I will need to run my own mail server. I will like some advice on the following: How can I install Ubuntu 8.0.4 server LTS in a chroot? How can I install Plesk in Ubuntu 8.0.4 server LTS (from the command line) Can anyone recommend how I back up the remote server when I go live (i.e. what tools to use)?. I will need to back up both databases, as well as some config data and installation packages

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• Sendmail : Mail delivery of same domain to internal or external mail server.

  - by Silkograph

  Its bit difficult to explain but very simple problem. We have internal sendmail server and hosted server. Both are set to same domain name. We have mixed mail accounts. For example we have two user in one office. [email protected] is local only [email protected] is internal plus external. Internal means we create user on local linux box where sendmail is set. External means we create user on local and hosted server. [email protected] can send mails to any internal user created on Linux box where sendmail is installed. But he can not send mail to outside domain and no mail can be sent to him as there is no account created on external hosted server. [email protected] can send mails to internal as well as all other domains through sendmail's smart_host feature, which uses hosted server's smtp. [email protected] can get all external emails internally through Fetchmail on linux box. Now we have third user [email protected] who will be always outstation and can use external server only. So I can not create account on local linux box for [email protected] because his mail will get delivered locally only. I don't want to create alias and send his mails to gmail or yahoo's account. I want to send emails to his external account from any internal user. How this can be done? Thanks in advance.

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• Cross-forest universal groups on Windows Server?

  - by DotGeorge

  I would like to create a Universal Group whose members are a mix of cross-forests users and groups. In the following example, two forests are mentioned (US and UK) and two domains in each forest (GeneralStaff and Java): For example, the universalDevelopers group may comprise of members from UK.Java.Developers and US.Java.Developers. Then, for example, there may be a group of universalSales which contains the users UK.GeneralStaff.John and US.GeneralStaff.Dave. In UK forest at the minute, I can freely add members and groups from the UK. But there is no way to add members from the US forest, despite having a two-way trust in place... e.g. I can login with US members into UK and vice-versa. A further complication is that, with a Universal group in the UK (which contains three domains), I can only add two of the three. It can't see the third. Could people please provide some thoughts on why cross-forest groups can't be created and ways of 'seeing' all domains within a forest. EDIT: This is on a combination of Windows 2003 and 2008 server. Answers can be regarding either. Thanks!

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• winbind failing after a semi-random amount of time

  - by The Digital Ninja

  I have winbind set up to authenticate to our AD for samba shares. This is the third such server, and the only one having any issues. It seems after a random amount of time samba shares will just stop working. Winbind processes seem to be running but restarting them seems to fix the issue for a while. Looking at the logs have been kind of hit an miss and I don't know exactly when it fails. One interesting thing is that it seems to be pulling from another domain controller that it shoudlnt. I censored out the domain name in this example. But isnt there some way to block authentication to a domain? I'm not sure if this is a symptom or a cause of the issue. [2010/10/18 08:02:10, 0] winbindd/winbindd_cache.c:initialize_winbindd_cache(2577) initialize_winbindd_cache: clearing cache and re-creating with version number 1 [2010/10/18 09:15:54, 1] libsmb/clikrb5.c:ads_krb5_mk_req(686) ads_krb5_mk_req: krb5_get_credentials failed for [email protected] (Cannot find KDC for requested realm) [2010/10/18 09:15:54, 1] libsmb/cliconnect.c:cli_session_setup_kerberos(624) cli_session_setup_kerberos: spnego_gen_negTokenTarg failed: Cannot find KDC for requested realm [2010/10/18 09:15:54, 0] lib/util_sock.c:write_data(1139) write_data: write failure. Error = Connection reset by peer [2010/10/18 09:15:54, 0] libsmb/clientgen.c:write_socket(242) write_socket: Error writing 108 bytes to socket 18: ERRNO = Connection reset by peer [2010/10/18 09:15:54, 0] libsmb/clientgen.c:cli_send_smb(290) Error writing 108 bytes to client. -1 (Connection reset by peer)

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• Tri-head linux system with Xmonad: is it possible to have HW acceleration

  - by progo

  What means there exists to have three monitors, all controlled by Xmonad and have hardware 3D acceleration as well? I had the pleasure of using three monitors earlier this year, and while Xmonad and Xinerama handle three monitors easily, I had to throw in an extra display driver, and also let go of Nvidia's own TwinView (which is a hack on Xinerama). This left me with no HW acceleration and some flickering as double buffering wouldn't work with certain applications. However, the three monitors handle so beautifully that I had hard time coming back to two. I understand the easiest way to achieve HW-accelerated tri-head combo is to split into two Xorgs. I wouldn't be able to switch windows between the Xorgs, so I'm not really into this solution. What's more, having a cheap and old PCI card along with even slightly better PCIe seemed to slow things down. Even if I occasionally disabled the third monitor from Xorg configure, I couldn't get HW acceleration to work. Only after I physically disconnected the old PCI card, I could get the games back in business. Would a Matrox Dual/Tri-head2go and a powerful Nvidia GPU do the trick? I understand Xmonad can be configured to "believe" that a "single" (as Dualhead2Go will merge) 3360x1050 display is actually two different ones? So that Xmonad's Mod-w and Mod-e would work properly there.

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• need advice on data center move, communication with both facilities during transition

  - by Brian Roden

  We are beginning the process of moving to a new facility. Office and warehouse operations will both be moving, and we must get shipping operations up and running at the new location while continuing to ship from the old location. Our contract with some third-party warehouse tenants requires two business day turnaround (only weekends and holidays excluded), so we can't have major downtime during the move. We would like to keep our 172.16.60/61.xxx internal address space in use throughout the move. Is it possible to keep using this same internal range, and have our existing WatchGuard Firebox 520 and whatever router we get for the other location (preferably the same model) just treat both locations as one network, leaving our host IPs the same throughout the move? Renumbering the servers when they move isn't a big deal, but our wireless terminals for order picking in the warehouse have fixed IPs (and a fixed IP, non-DNS reference to the host they speak with) and would be a massive undertaking to reconfigure when the servers move (each device would have to be reconfigured at least 2 times -- some when we start using them in the new building and the host is still here, all of them in both locations when the host moves to the new building, and the rest when they finally make the move to the new building). We're trying to avoid that if possible.

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• What is the IPv6 equivalent to IPv4 RFC1918 addresses?

  - by Kumba

  Having a hard time wrapping my head around IPv6 here. A lot of the lingo seems targeted at enterprise-level IPv6 deployments, discussing link-local, site-local, global unicast, scopes, etc. Not a lot of solid information on really small networks, like home networks. I want to check my thinking and make sure I am getting the correct translations from IPv4-speak to IPv6-speak. The first question is, what's the equivalent of RFC1918 for IPv6? Initial searches suggested there was no equivalent. Then I stumbled upon Unique Local Addresses (RFC4193), and that states that all ULA's should be assigned the prefix fc00, followed by a 40-bit random number in the routing prefix. This random number is to "prevent collisions when two IPv6 networks are interconnected" -- again, another reference to an enterprise-level function. If I have a small local LAN at home, numbered using 192.168.4.0/24, what's my equivalent in IPv6's ULA scope? Assuming I will never, ever, tie that IPv6 address into the real internet (a router will NAT & firewall it), can I ignore the RFC to an extent and go with fc00::4:0/120? It also seems that any address in fc00::/7 are to be globally routable. Does this mean I'll need extra protections so my router would not automatically start advertising these private IPv6 addresses to the world? Second question, what's this link-local thing? Reading suggests a default-assigned address in the fe80::/10 range that has the last 64bits of the address comprised of the interface's MAC address. Seems to be required, too, but I'm annoyed by the constant discussion of it in relation to enterprise networks. Third question, what is scope id for? Seems to be yet another term tossed around in relation to enterprise networks, especially when interconnecting them, but almost no explanation on the smaller home network level. Can I see a scope ID AND CIDR notation used together? I.e., fc00::4:0/120%6, or are scope IDs only supposed to be applied to a single /128 IPv6 address?

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• Excluding files from web logs

  - by Ray

  I originally tried this question on StackOverflow, but it was suggested that serverfault was a better choice. So, here it is... Looking through my web logs, I see a lot of entries that don't interest me. Some of them are commonly used images, css files, and scripts, which I can easily exclude by un-checking the 'log visits' check box in IIS for the folder properties. I would also like to exclude log entries for certain common requests which are not in their own folders. Mostly, 'favicon.ico'. 'scriptresource.axd', and 'webresource.axd'. These (especially scriptresource.axd) make up almost a third of a typical log file on my site. So, the question is, how do I tell IIS not to log these requests? And is there any reason that this is a bad idea? The purpose of doing this is to reduce the log file size and the amount of work the server has to do, to make the log file more manageable when I need to dig in to them for troubleshooting, and for my own curiosity. I realize that log file parsers can skip the junk, but I am interested in reducing the raw files, before parsing.

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• How to use more than 3 virtual disks in Linux using CentOS and XenServer

  - by 010110110101

  I've attached 5 virtual disks to a Virtual Machine in Citrix XenServer. The VM has the xs-tools installed. Initially it said that it couldn't add so many disks. After I installed the xs-tools, it let me add all the disks. But /dev doesn't show all the disks. It shows these: /dev/xvda /dev/xvdb /dev/xvdc /dev/cdrom Perhaps it is bound by the limits of an IDE bus? (3 disks + CD-ROM) If so, how does one change the VM to use SCSI? Edit: According to the documentation: 2.6.3. VM Block Devices In the PV Linux case, block devices are passed through as PV devices. XenServer does not attempt to emulate SCSI or IDE, but instead provides a more suitable interface in the virtual environment in the form of xvd* devices. It is also possible to get an sd* device using the same mechanism, where the PV driver inside the VM takes over the SCSI device namespace. This is not desirable so it is best to use xvd* where possible for PV guests (this is the default for Debian and RHEL). For Windows or other fully virtualized guests, XenServer emulates an IDE bus in the form of an hd* device. When using Windows, installing the Citrix Tools for Virtual Machines installs a special PV driver that works in a similar way to Linux, except in the fully virtualized environment. Still, with 5 virtual disks attached, I don't see the other xvd devices. Edit #2: (attached requested info) Host Machine: XenServer 6.1 Linux version 2.6.32.43-0.4.1.xs1.6.10.777.170770xen (geeko@buildhost) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-51)) #1 SMP Wed Apr 17 05:52:03 EDT 2013 Guest Machine: CentOS release 6.4 (Final) Linux version 2.6.32-358.6.2.el6.x86_64 ([email protected]) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Thu May 16 20:59:36 UTC 2013 Output of 'fdisk -l' on Guest Machine: Note, the disk beyond the first 3 attached are not displaying -- there should be 4 100GB disks. (There are a total of 5 disks displayed in XenCenter -- 16GB, 100GB, 100GB, 100GB, 100GB) Disk /dev/xvdb: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xfb6c95b9 Device Boot Start End Blocks Id System /dev/xvdb1 1 13054 104856223+ 83 Linux Disk /dev/xvda: 17.2 GB, 17179869184 bytes 255 heads, 63 sectors/track, 2088 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000e5f41 Device Boot Start End Blocks Id System /dev/xvda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/xvda2 64 2089 16264192 8e Linux LVM Disk /dev/xvdc: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xed249ced Device Boot Start End Blocks Id System /dev/xvdc1 1 13054 104856223+ 83 Linux Disk /dev/mapper/vg_blue-lv_root: 14.6 GB, 14571012096 bytes 255 heads, 63 sectors/track, 1771 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/vg_blue-lv_swap: 2080 MB, 2080374784 bytes 255 heads, 63 sectors/track, 252 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 I see that the Linux versions say SMP. The Guest VM doesn't say "xen" in the name. However, I have already run yum install kernel-xen. Could be a clue?

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• How do I load balance between two Linux machines?

  - by William Hilsum

  Inspired by the Stack Overflow network, I am now obsessed with HAProxy and trying to use it myself. At the moment, each HAProxy box has got two network cards (well, two configured, I can have a maximum of 4 and wasn't sure if they needed their own one for management between the boxes). On both machines, the backend one (eth1) is a private IP that goes to a switch connected to the webservers, and the front facing one (eth0) has a public internet IP that is routed straight though. In addition, I have created an additional virtual ip for eth0 called eth0:0 which has got a third public ip address. I just about get how to use it for load balancing between multiple web servers that are behind it, but, I am failing to load balance between the two HAProxy boxes - they appear to fight for the virtual IP, but, this does not appear to be a smart solution. Now, by using the virtual shared IP address, this solution appears to work and does seem to give me maximum uptime, but, is this the correct way to do it, or is there a smarter way? I have been looking at other Linux packages such as keepalived, but, I have only been using Linux (server) for a week now and am at the limits of my understanding. Is there anyone who has done this before and can you advise anything for maximum uptime?

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• OpenSolaris livecd, NForce NIC driver, and NTFS USB mounting. Oh My!

  - by Jake Wharton

  I'm attempting to install OpenSolaris 2009.06 on my server. Before I do I would like to test that everything works and am running in to problems. It has an Abit AN-M2 motherboard with an NForce chipset. The driver config utility says that I need a third-party driver and links me to http://homepage2.nifty.com/mrym3/taiyodo/eng/. Scrolling to the bottom, I have downloaded both tgzs just in case. Now the fun part: The only way to get this on to the computer is via a USB drive since I can't access the network. Also, install CD in the drive otherwise I'd just burn them to DVD. Since my USB key is NTFS formatted I cannot mount it since the install CD seems to be lacking NTFS drivers which require more downloaded packages. What should I do? The server will simply be a dumb NAS and I know that there exists other OpenSolaris-based flavors such as Nexenta but from what I read the stock install is likely the best. If this is not the case and pursuing a different flavor is required or better I will also accept that as an answer (but please don't jump straight to it).

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• Loss of network connectivity when playing video on Optoma HD180 projector

  - by Jeff Fohl

  Hi Folks - New to Super User, so I hope this question fits in with the guidelines. Very strange problem I am having, and I am at a loss as to how to continue troubleshooting this one. The basic problem is that when I attempt to watch streamed video on a particular display device (an Optoma HD180 projector), my network connectivity drops like a stone to barely measurable levels. This is my setup: I have a Dell H2C 730x running Windows 7 64bit. This particular computer has two ATI Radeon HD 4800 video cards. I have two Samsung 22" monitors connected to one card, and an Optoma HD180 digital projector connected to the other card via an HDMI cable. My internet connection is normally a reliable 6Mbps. The problem I am having occurs when I stream video (or even just browse the web) on the Optoma Projector. When I do this, my internet connection drops to practically zero (just a few kilobits per second). When I move the browser away from the projector, and over to one of my Samsung monitors, the internet connection comes right back. Note that the Optoma projector is on and enabled as a third monitor all this time. I can move the mouse around on the projector without triggering the problem. I tried pinging my router when I was playing a movie on one of the monitors, and I get a 1 millisecond response. However, when I have the movie playing on the Optoma projecter, pinging the router gives me response times in the hundreds of milliseconds, or times out completely. So, it clearly is something local to my machine - and not some sort of throttling occurring down the line. I would think that it is possibly something to do with the HDMI driver conflicting somehow with my network driver (which is a USB-based wireless connection). This one has me really stumped. Anyone have any ideas?

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• Using virtualization infrastructure for J2EE application distribution- viable alternative?

  - by Dan

  Our company builds custom J2EE web solutions. At the moment, we use standard J2EE distribution mechanisms (ear/war archives). Application servers are generally administered by our clients' IT departments and since we do not have complete control over the environment, a lot of entropy can be introduced into the solution. For example: latest app. server patch not applied conflicting third party libraries inside the app. server root server runtime and tuning parameters not configured (for example, number of connections in database pool) We are looking into using virtualization infrastructure for J2EE application distribution. Instead of sending the ear/war archive, we’d send image with application server node and our application preinstalled. Some of the benefits are same as using with using virtualization infrastructure in general, namely better use of hardware resources. For us, it reduces the entropy of hosting infrastructure - distributing VM should be less affected by hosting environment. So far, the downside I see can be in application server licenses, here they will have to use dedicated servers for our solution, but this is generally already done that way. Also, there is a complexity with maintaining virtualization infrastructure, but this is often something IT departments have more experience with than with administering and fine-tuning J2EE solutions. Anyone has experience with this model? What are the downsides? Will we not just replace one type of complexity with other?

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• What is the best way to create a failover cluster for my IIS website?

  - by ObligatoryMoniker

  Our eCommerce website www.tervis.com currently runs on two servers: SQL server: 2005 x 86 on Windows Server 2003 Standard x86 with a single dual core processor and 4 gb of memeory IIS server: Windows Server 2008 Web edition x64 with dual quad core hyper threaded processors and 32 gb of memory Tervis.com's revenue has steadily grown to the point where we need to have redundant servers deployed with a fail over mechanism so that we do not have any down time. Because the SQL server is so underpowered compared to the web server my thought was to purchase: 2 x SQL Server 2008 R2 web edition x64 single processor license 2 x Windows Server 2008 R2 Web Edition Licenses 1 x New Physical dual quad core 32 GB server 1 x F5 Load Balancer I need the Windows Server 2008 R2 Web Edition licenses so that I can run SQL and IIS on the same box for both of these servers. The thought is to run this as an active/passive fail over cluster that could be upgraded to an active/active cluster if we purchased the additional SQL licensing. The F5 load balancer would serve as the device that monitors the two servers and if the current active one stops responding then fails over to using the other server. To be clear this is not windows clustering but simply using a load balancer to fail over between two computers so that you now have a cluster in the general sense. Is this really the best way to accomplish what I need? Is there some way to leverage the old server 2003 SQL server to function as the devices that funnels http requests to the appropriate active server and then fails over if a problem occurs? Is there any third party clustering software that might help me accomplish this in a simpler fashion?

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• Can't write to samba share

  - by Tiddo

  I try to setup a samba file server, but whatever I do I can't get write access to work (reading works fine). This is my current situation: I have a local fileserver with 3 harddisks mounted at /mnt/share/disk<nr>. 2 of these use the ext4 filesystem, the third one is ntfs. This file server runs Fedora 18 32-bit. The root folders of these harddisks are owned by superman:superman, and testparm outputs the following: [global] workgroup = WORKGROUP netbios name = FILE_SERVER server string = Samba Server Version %v interfaces = lo, eth0, 192.168.123.191/8 log file = /var/log/samba/log.%m max log size = 50 unix extensions = No load printers = No idmap config * : backend = tdb hosts allow = 192.168.123. cups options = raw wide links = Yes [share] comment = Home Directories path = /home/share/ write list = superman, @users force user = superman read only = No create mask = 0777 directory mask = 0777 inherit permissions = Yes guest ok = Yes I've tried a lot to get this to work: the disk are chmodded to 777, I've tried turning off selinux, I've added the samba_share_t label to the disks and as can be seen in the above output I tried to make the smb config as permissive as I could, but still I cannot write to the share (tried from Windows 7 and another Fedora installation). What can I try to be able to write to the shares? EDIT: The replies I got so far are mostly concerned with the smb.conf. I have however tried a lot of different setup, ready made configs, and solutions to similar problems for the smb.conf file, so I suspect that the real problem is somewhere else.

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• Search inside of text files

  - by Matt

  So here is the situation. I currently run a mail server for my small non-profit company. My mail server (Merak Mail Server) keeps logs in .log files and mail as .tmp files. Essentially these are just text files that are kept on the server. Problem is that when I put text into the "Containing text" field on Windows Explorer, it always misses the files and tells me no results returned. Then when I search the files one by one (painful at best), I find the files I need. Do I not understand the search feature well enough, or maybe I have it indexing wrong. I really don't care what I need to use to search the files, even a third-party app is fine with me, I just want to type an email address into a box and search all of my log files or email files and find out which one I am looking for. It can be Windows Search or something else, as long as I can find a way to get the job done I will be happy. Pay solutions are fine as well. Thanks everyone in advance.

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