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• MySQL is killing the server IO.

  - by OneOfOne

  I manage a fairly large/busy vBulletin forums (running on gigenet cloud), the database is ~ 10 GB (~9 milion posts, ~60 queries per second), lately MySQL have been grinding the disk like there's no tomorrow according to iotop and slowing the site. The last idea I can think of is using replication, but I'm not sure how much that would help and worried about database sync. I'm out of ideas, any tips on how to improve the situation would be highly appreciated. Specs : Debian Lenny 64bit ~12Ghz (6x2GHz) CPU, 7520gb RAM, 160gb disk. Kernel : 2.6.32-4-amd64 mysqld Ver 5.1.54-0.dotdeb.0 for debian-linux-gnu on x86_64 ((Debian)) Other software: vBulletin 3.8.4 memcached 1.2.2 PHP 5.3.5-0.dotdeb.0 (fpm-fcgi) (built: Jan 7 2011 00:07:27) lighttpd/1.4.28 (ssl) - a light and fast webserver PHP and vBulletin are configured to use memcached. MySQL Settings : [mysqld] key_buffer = 128M max_allowed_packet = 16M thread_cache_size = 8 myisam-recover = BACKUP max_connections = 1024 query_cache_limit = 2M query_cache_size = 128M expire_logs_days = 10 max_binlog_size = 100M key_buffer_size = 128M join_buffer_size = 8M tmp_table_size = 16M max_heap_table_size = 16M table_cache = 96 Other : From the cloud's IO chart, we're averaging 100mb/s read. > vmstat procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 9 0 73140 36336 8968 1859160 0 0 42 15 3 2 6 1 89 5 > /etc/init.d/mysql status Threads: 49 Questions: 252139 Slow queries: 164 Opens: 53573 Flush tables: 1 Open tables: 337 Queries per second avg: 61.302. moved from superuser

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• How to use a Macro command button in mac excel 2011

  - by user21255

  Im using Mac excel 2011 and I can't seem to get Macro to work. What I am trying to do is that in Worksheet (1st) I am trying to get all of the data entered in the Cases Table at the bottom to all be automatically inserted into the table in the "Cases" worksheet when I click on the "Update" button. But instead I keep getting a pop up saying runtime error and then it asks if I want to End, debug or something else. I just don't know if it is because I am not using Mac Excel correctly as I am used to using windows because I believe my code is correct in the VBA editor to get the button working. Anone who is able to use Mac excel 11 can they check to see if they can use the file provided to see i the button works? If anyone has windows excel then please feel free to check to see if it works on there as well. If it is a coding problem then can you please let me know. My question is simply how to run and stop a Macro in Mac excel 2011. The file can be accessed below: http://ge.tt/76qNwIx/v/0 Thanks

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• Apache 2.2, worker mpm, mod_fcgid and PHP: Can't apply process slot

  - by mopoke

  We're having an issue on an apache server where every 15 to 20 minutes it stops serving PHP requests entirely. On occasions it will return a 503 error, other times it will recover enough to serve the page but only after a delay of a minute or more. Static content is still served during that time. In the log file, there's errors reported along the lines of: [Wed Sep 28 10:45:39 2011] [warn] mod_fcgid: can't apply process slot for /xxx/ajaxfolder/ajax_features.php [Wed Sep 28 10:45:41 2011] [warn] mod_fcgid: can't apply process slot for /xxx/statics/poll/index.php [Wed Sep 28 10:45:45 2011] [warn] mod_fcgid: can't apply process slot for /xxx/index.php [Wed Sep 28 10:45:45 2011] [warn] mod_fcgid: can't apply process slot for /xxx/index.php There is RAM free and, indeed, it seems that more php processes get spawned. /server-status shows lots of threads in the "W" state as well as some FastCGI processes in "Exiting(communication error)" state. I rebuilt mod_fcgid from source as the packaged version was quite old. It's using current stable version (2.3.6) of mod_fcgid. FCGI config: FcgidBusyScanInterval 30 FcgidBusyTimeout 60 FcgidIdleScanInterval 30 FcgidIdleTimeout 45 FcgidIOTimeout 60 FcgidConnectTimeout 20 FcgidMaxProcesses 100 FcgidMaxRequestsPerProcess 500 FcgidOutputBufferSize 1048576 System info: Linux xxx.com 2.6.28-11-server #42-Ubuntu SMP Fri Apr 17 02:45:36 UTC 2009 x86_64 GNU/Linux DISTRIB_ID=Ubuntu DISTRIB_RELEASE=9.04 DISTRIB_CODENAME=jaunty DISTRIB_DESCRIPTION="Ubuntu 9.04" Apache info: Server version: Apache/2.2.11 (Ubuntu) Server built: Aug 16 2010 17:45:55 Server's Module Magic Number: 20051115:21 Server loaded: APR 1.2.12, APR-Util 1.2.12 Compiled using: APR 1.2.12, APR-Util 1.2.12 Architecture: 64-bit Server MPM: Worker threaded: yes (fixed thread count) forked: yes (variable process count) Server compiled with.... -D APACHE_MPM_DIR="server/mpm/worker" -D APR_HAS_SENDFILE -D APR_HAS_MMAP -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled) -D APR_USE_SYSVSEM_SERIALIZE -D APR_USE_PTHREAD_SERIALIZE -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT -D APR_HAS_OTHER_CHILD -D AP_HAVE_RELIABLE_PIPED_LOGS -D DYNAMIC_MODULE_LIMIT=128 -D HTTPD_ROOT="" -D SUEXEC_BIN="/usr/lib/apache2/suexec" -D DEFAULT_PIDLOG="/var/run/apache2.pid" -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" -D DEFAULT_ERRORLOG="logs/error_log" -D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types" -D SERVER_CONFIG_FILE="/etc/apache2/apache2.conf" Apache modules loaded: alias.load auth_basic.load authn_file.load authz_default.load authz_groupfile.load authz_host.load authz_user.load autoindex.load cgi.load deflate.load dir.load env.load expires.load fcgid.load headers.load include.load mime.load negotiation.load rewrite.load setenvif.load ssl.load status.load suexec.load PHP info: PHP 5.2.6-3ubuntu4.6 with Suhosin-Patch 0.9.6.2 (cli) (built: Sep 16 2010 19:51:25) Copyright (c) 1997-2008 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies

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• keyboard intermittently stops working even after reinstalling windows 7; possibly a Chrome issue?

  - by neverskipbreakfast

  My keyboard intermittently stops working. Sometimes a couple of keys will work, but usually none. Sometimes if I mash the ctrl+alt+windows keys randomly for a bit, the keyboard will let me type one more letter before stopping again. Sometimes the keys will open a program menu but usually not. I have even completely wiped my machine and reinstalled windows 7; the problem continues. Specs: Intel iMac (early 2006, 2.0GHz, 2MB RAM, 240GB HD) running ONLY Windows 7 Professional, 32-bit (NOT through boot camp) and using a USB keyboard (Saitek Eclipse II.) Unplugging & reconnecting keyboard does NOT fix it. Connecting a different keyboard does NOT fix it. That one won't work, either. Drivers are up-to-date. Removing and reinstalling drivers does NOT fix it. Restarting the computer does NOT fix it. In fact, when the Windows logon screen appears the keyboard won't work and neither will the icon to pull up the on-screen keyboard. My mouse can click around just fine. I can only log onto a non-password protected account. Generally, logging into as different Windows user fixes it. I can then log back on to my main user account and continue work for a few hours until it happens again. Clearing my Chrome browsing data stopped the problem from recurring for a week or so. I have already REINSTALLED Windows 7 (not just a restore.) The problem returned after 2 days of use. I use Avira free antivirus software, and repeated scans turn up nothing fishy. I suspect it is related to something in Google Chrome because I used my google account to reload all my previous Chrome extensions, saved data, etc. (Chrome Extensions Installed: AdBlock, Better Google Tasks, DropBox, FB Photo Zoom, Google Mail Checker, StayFocusd.) Any ideas? Any at all?

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• I love google Chrome, but some non-static pages like Piwik render it unresponsive

  - by gogowitsch

  The web-stat software Piwik stops reacting on mouse clicks after 1-2 seconds. The same is true for Google Maps and Producteev (but GMail and most other pages work like a charm). These rely heavily on JS, and work without Flash. I can click for a very short time period and then the mouse cursor doesn't feel the UI anymore (it doesn't turn into a I over input fields, though it moves; if the freeze occured while the pointer was over an input field, the cursor keeps being a I) and all clicks on the DOM are being ignored by Chrome. No message appears, neither obvious nor in the Console (F12). There is no obstructing div or the like in the DOM (F12). Since I couldn't find any hints on the source of my problems, I suspected my plugins and extensions. Unfortunately, neither deactivating all plugins nor all extensions solved the problem. for the problematic pages, it always happens no Dropbox running several GB of free RAM the taskmanager doesn't show any high CPU or memory utilization (the offending tab uses 30 MB and uses 0-1 % CPU) all problematic pages work in other browsers (Chrome, Firefox, IE) the rest of the computer is very responsive the computers use different security suites (Kaspersky and Avira) The effect exists between several (synchronized) Chrome instances on different machines, all running Windows 7. Both the OS and Chrome are updated automatically. Other tabs and the Chrome chrome (tabs, menus, toolbar buttons of the browser itself) still work. I really don't like switching between browsers. Any ideas?

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• How to direct reverse proxy requests using wildcard vhosts

  - by HonoredMule

  I'm interested in running a reverse proxy with 2-3 virtual machines behind it. Each internal server will run multiple virtual hosts, and rather than manually configuring each individual vhost on the proxy (a variety of vhosts come and go too often for this to be practical), I would like to use something which can employ pattern matching in a sequential order to find the appropriate back-end server. For example: Server 1: *.dev.mysite.com Server 2: *.stage.mysite.com Server 3: *.mysite.com, dev.mysite.com, stage.mysite.com, mysite.com Server 4: * In the above configuration, task.dev.mysite.com would go to Server 1, dev.mysite.com would go to Server 3, yoursite.stage.mysite.com to Server 2, www.mysite.com to Server 3, and yoursite.com to Server 4. I've looked into using Squid, Varnish, and nginx so far. I have my opinions regarding their respective desirability and general suitability, but it's not readily apparent if any of them can handle dynamic server selection in this manner and not require per-vhost configuration. Apache on the other hand can do this handily and simply, but otherwise (aside from being well-known and familiar) seems very poorly suited to the partly-performance-serving task. Performance isn't actually a major concern yet, but it seems foolish to use Apache if another system will perform far better and can also handle the desired 'hands-free' configuration. But so is frequently having to adjust the gateway for all production services and risk network-wide outage...and so also is setting oneself up for longer downtime later if Apache becomes a too-small bottleneck. Which of these (or other) reverse proxies can do it/would do it best? And maybe I should post this as a separate question, but if Apache is the only practical option, how safe/reliable/predictable is apache-mpm-event in apache2.2 (Ubuntu 12.04.1) particularly for a dedicated reverse proxy? As I understand it the Event MPM was declared "safe" as of 2.4 but it's unclear whether reaching stability in 2.4 has any implications for the older (2.2) versions available in official/stable package channels of various distros.

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• Are there any Microsoft Exchange Clients for iOS and Android that store their local data in an encrypted manner?

  - by Zac B

  I don't feel like this is a product recommendation question, more of a "does this tech even exist and is it feasible" question, but if I'm wrong, feel free to give this question the boot. Context: Our company has a bunch of traveling employees who access the company's Exchange server via thier iDevices or android phones, but because of the data protection laws in the state where our company is based (and the nature of the data our company works with), a recent security audit found that all mobile devices (laptops, phones, etc) operated by our company need to have all company correspondence and related data encrypted all the time. For laptops, that was easy: BitLocker or TrueCrypt, problem solved. For phones and tablets, however, I'm stumped. Sure, you can put lock screens/passwords on the phones, but the data is still accessible via external extraction, as law enforcement authorities already know. Question: Are there any clients for Microsoft Exchange that run on iOS or Android which store local data encrypted? The people using our mobile devices do a lot of their work while offline, so just giving them OWA access with SSL connection security isn't enough. Are there apps/technologies that present an additional login credential prompt to decrypt locally stored data in the app's storage area on the phone? My gut reaction when I started looking into this was "that doesn't sound like something Apple would allow into the App Store", but I've been wrong before...

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• Backup, Migrate or Clone Failing CentOS 4 (LVM)

  - by Hegelworm

  Hello there, I've been running a BlueQuartz CentOS 4 system (Nuonce.net distro) for a few years now and although the hard drive (Deskstar) has always been a bit noisy, on a few recent occasions I've heard it having trouble spinning up. Basically, I want to clone this drive to a similar sized one (80 Gig). I've spent many hours reading upon dd, dd_rescue, rsync, clonezilla and LVM mirroring yet the sheer number of options and nightmarish accounts has left me frozen - unable to make an informed decision as to how to start. I've made a few attempts. dd failed after about 2 hours, as, although the drives appeared to be identical on the surface (ATA Seagate Barracudas, Thai not Chinese), the destination drive is slightly smaller. My most recent attempt involved using a Debian CD to format the new drive and then rsync-ing everything over and editing the new drive's grub and fstab to reflect the changes. No joy here either as I hadn't chosen LVM when partitioning the destination drive and it wouldn't boot. As you can probably tell, I'm out of my depth here and a panic-invoking mixture of caution and frustration has prompted me to sign up here. The server itself, although not strictly a production environment, has a very specific installation of Festival, LAME and ffMpeg and provides the back-end for a Text-to-Speech jQuery plugin that I've built over the last 2 years. I'm also planning to rebuild the whole TTS system on Debian as the existing CentOS system still has PHP4 etc. For now though, I'd really like to just shift everything over to a new drive. As this is my first post, please feel free to lay any house rules on me that I might've overlooked; I've been hovering around StackOverflow for a while now but have only just signed up. Many thanks.

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• Heavy Apache memory usage

  - by Ree

  Recently I've noticed that httpd processes started to consume massive amounts of memory - after some time pretty much using almost all of the 2GB of RAM the server has and I don't have any memory left for other stuff. Here's what top tells me: 26409 apache 15 0 276m 152m 28m S 0 7.4 0:59.12 httpd 26408 apache 15 0 278m 151m 28m S 0 7.4 1:03.80 httpd 26410 apache 15 0 277m 149m 26m S 0 7.3 0:57.22 httpd 26405 apache 15 0 276m 148m 25m S 0 7.3 0:59.20 httpd 26411 apache 16 0 276m 146m 23m S 0 7.2 1:09.18 httpd 17549 apache 15 0 276m 144m 23m S 0 7.0 0:36.34 httpd 22095 apache 15 0 276m 136m 14m S 0 6.6 0:30.56 httpd It seems to me that each httpd process does not free the memory after handling a request. So they all sit at ~270MB which is BAD. Is there a way for me to know where all the memory goes and why it stays that way? I haven't done any server tweaking lately, so I'm sure it's not me who messed something up (haven't had the problem before). The server is used to serve PHP apps. EDIT: Apache is configured with prefork module and MaxRequestsPerChild is set to 4000.

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• LTO 2 tape performance in LTO 3 drive

  - by hmallett

  I have a pile of LTO 2 tapes, and both an LTO 2 drive (HP Ultrium 460e), and an autoloader with an LTO 3 drive in (Tandberg T24 autoloader, with a HP drive). Performance of the LTO 2 tapes in the LTO 2 drive is adequate and consistent. HP L&TT tells me that the tapes can be read and written at 64 MB/s, which seems in line with the performance specifications of the drive. When I perform a backup (over the network) using Symantec Backup Exec, I get about 1700 MB/min backup and verify speeds, which is slower, but still adequate. Performance of the LTO 2 tapes in the LTO 3 drive in the autoloader is a different story. HP L&TT tells me that the tapes can be read at 82 MB/s and written at 49 MB/s, which seems unusual at the write speed drop, but not the end of the world. When I perform a backup (over the network) using Symantec Backup Exec though, I get about 331 MB/min backup speed and 205 MB/min verify speeds, which is not only much slower, but also much slower for reads than for writes. Notes: The comparison testing was done on the same server, SCSI card and SCSI cable, with the same backup data set and the same tape each time. The tape and drives are error-free (according to HP L&TT and Backup Exec). The SCSI card is a U160 card, which is not normally recommended for LTO 3, but we're not writing to LTO 3 tapes at LTO 3 speeds, and a U320 SCSI card is not available to me at the moment. As I'm scratching my head to determine the reason for the performance drop, my first question is: While LTO drives can write to the previous generation LTO tapes, does doing so normally incur a performance penalty?

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• Gmail notification in Ubuntu's native mail icon.

  - by D Connors

  So, new Ubuntu 10.04 up and running. Playing with the interface eventually got me curious about something. Up until now, I've only used the chat and broadcasting functionalities of the mail icon in Ubuntu's top panel, mostly because I take care of my mail on firefox so I don't need one more program (empathy) running on my poor little netbook. I'm currenty using gnome-gmail to set gmail as my default mail client in Ubuntu. But, when I click on the "Set up mail" item, inside the Panel's Mail icon, it simply brings up empathy. My question is: Is it possible (in any way whatsoever) to have my gmail notifications up there, configured so that clicking it will just take me to a gmail tab in Firefox? (instead of opening up empathy) This is really just some frivolous interest of mine, nothing important. Right now I'm using check-gmail to notify me of new mail, but the panel is really cramped up on my netbook, so it'd be nice to free up some room by getting rid of check-gmail and only using Ubuntu's mail icon. Ok, hope I was clear enough.

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• ZFS: Mirror vs. RAID-Z

  - by John Clayton

  I'm planning on building a file server using OpenSolaris and ZFS that will provide two primary services - be an iSCSI target for XenServer virtual machines & be a general home file server. The hardware I'm looking at includes 2x 4-port SATA controllers, 2x small boot drives (one on each controller), and 4x big drives for storage. This allows one free port per controller for upgrading the array down the road. Where I'm a little confused is how to setup the storage drives. For performance, mirroring appears to be king. I'm having a hard time seeing what the benefit would be of using RAIDZ over mirroring would be. With this setup I can see two options - two mirrored pools in one stripe, or RAIDZ2. Both should protect against 2 drive failures, and/or one controller failure...the only benefit of RAIDZ2 would be that any 2 drives could fail. The storage should be 50% of capacity in both cases, but the first should have much better performance, right? The other thing I'm trying to wrap my mind around is the benefit of mirrored arrays with more than two devices. For data integrity what, if any, would be the benefit of a RAIDZ over a three-way mirror? Since ZFS maintains file integrity what does RAIDZ bring to the table...doesn't ZFS's integrity checks negate the value of RAIDZ's parity?

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• Windows 7 on an EEE PC 901 - Is it a practical change?

  - by Dave

  I am currently running WinXP on my EEE PC 901, and I'm happy to say that it runs really well. But this did not come with out significant manipulation of the OS. Here's the basic steps I took: Install XP Modify registry to install Install bare essential drivers Relocate page file to d:\ (remember, this model has two SSD's, one roughly 3.6gb, and the other roughly 16gb - XP won't run on the bigger drive, only the smaller one) Install remaining drivers skip normal updates, install service pack 2 straight away. modify system registry to place service pack backup folder into new Program Files directory on D drive (where software is being installed). Change My Documents folder to sit on D drive. Install .net framework Install remaining updates and service pack 3 (the hidden backup folders in the c:\Windows directory are deleted after every update as well as the contents of the service pack downloads folder in order to continually free up space). I have also found that Disktrix UltimateDefrag to be brilliant at keeping the system clean and tidy. This is roughly the order I did things in. In this configuration the machine works really well. QUESTION: Can this kind of configuration be implemented with Windows 7 to achieve the same result on this machine? Thanks in advance. Dave.

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• Windows 7 Black Screen On Boot, Seperate Bootable VHD Works Fine

  - by David Osborn

  I have a Window 7 x64 install with a bootable VHD (also Windows 7 x64). I was having problems getting my homeserver to do backups (VSS erred) so I ran check disk and used a tool from MS (cleanc2r.exe) to remove an empty Q drive from the VHD that I believe was a result of installing Office 2010 Beta. (All of this was done on the bootable VHD, not the main install.) Now I can't boot into the main install. It gets past the Starting Windows screen and then goes black. I can still boot into the bootable VHD and everything works fine from there. I have tried to boot the main install in Safe Mode/Safe Mode with Networking/and Safe Mode command prompt and it has the same issue. I ran chkdsk /r on the main install and after doing all the work there was a message about correcting some free space that was marked as allocated and also that it was unable to make an entry into the event log. I tried the startup repair utility and it found no problems. I don't see the setting for restore to last know good configuration so I couldn't do that. I don't recall installing anything new to the main install nor having hooked up any new hardware recently.

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• Data recovery on a corrupted 3TB disk

  - by Mark K Cowan

  Short version I probably need software to run a deep-scan recovery (ideally on Linux) to find files on NTFS filesystem. The file data is intact, but the references are no longer present. Analogous to recovering data from a "quick-formatted" partition. Hopefully there is a smarter way available than deep-scan, one which would recover filenames and possibly paths. Long version I have a 3TB disk containing a load of backups. Windows 7 SP1 refused to detect the disk when plugged in directly via SATA, so I put it on a USB/SATA adaptor which seemed to work at first. The SATA/USB adaptor probably does not support disks over 2.2TB though. Windows first asked me if I wanted to 'format' the disk, then later showed me most of the contents but some folder were inaccessible. I stupidly decided to run a CHKDSK on my backup disk, which made the folders accessible but also left them empty. I connected this disk via SATA to my main PC (Arch Linux). I tried: testdisk ntfsundelete ntfsfix --no-action (to look for diagnostically relevant faults, disk was "OK" though) to no avail as the files references in the tables had presumably been zeroed out by CHKDSK, rather than using a typical journal'd deletion). If it is useful at all, a majority of the files that I want to recover are JPEG, Photoshop PSD, and MPEG-3/MPEG-4/AVI/MKV files. If worst comes to worst, I'll just design my own sector scanner and use some simple heuristic-driven analysis to recover raw binary blocks of data from the disk which appears to match the structures of the above file types. I am unfamiliar with the exact workings of NTFS but used to be proficient at recovering FAT32 systems with just a hex-editor, so I can provide any useful diagnostic information if you let me know how to find it! My priorities in ascending order of importance for choosing the accepted answer: Restores directory structure Recovers many filenames in addition to the file data Is free / very cheap Runs on Linux Recovers a majority of file data The last point is the most important, but the more of the higher points you match the more rep you'll probably get :)

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• How can I download a file directly to a web server?

  - by matt

  I'd like to download files directly to a hosted server, whether it's one I set up myself or a hosted service like Dropbox. For example, when I download a podcast, instead of downloading it to my computer then uploading it to the server, how can I have it download directly to the cloud. My interest here is reducing the traffic I'm using over a metered data plan on my laptop, so I don't want my computer acting as a physical intermediary caching the file. Ideally, there would be some way for me to have a download link and tell it to go directly to my server. How can I accomplish this? I realize that this question is potentially involving a "webapp" and it is potentially involving "server administration" and since my goal is to cut my computer out of the loop I can see people saying this is off-topic and should be on another site. My issue is this: I don't know if this is going to be a webapp solution or a server solution but I do know regardless I'm going to be using a computer to get it done and I am replacing a function that's currently done on my computer so I figured I'd ask it here. If I was wrong and this definitely should be at webapps feel free to let me know or just migrate it.

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• Troubleshooting wireless connection problem / site survey?

  - by johnnyb10

  I just started in the IT department of a small company (200 users) and it's clear that one of the main problems that is driving everyone crazy is the spotty nature of the wireless connectivity throughout the office, particularly in certain conference rooms. This is a huge problem because the connection often drops during important presentations to clients. I was hired to help ease the load on the existing IT admin, who has done a great job, but is overloaded with many other tasks to deal with. So I would like to try to help out with this wireless issue. I am looking for advice on the best way to solve this problem--a realistic troubleshooting methodology that does not require me to spend any money. So far, I've experimented with Ekahau Heat Mapper, which is free and helps create a site survey. But I'm not exactly sure what I'm looking for or if there are other programs/tools/methods I should try as well. Any advice would be greatly appreciated. [Some background: The wireless setup consists of an HP ProCurve Mobility MSM (710?) controller that controls 10 access points throughout the building. There are three virtual wireless networks configured on the controller: one seems to be a default that cannot be changed, one is for internal employees and authenticates via Active Directory, and the third is a guest network for visitors. When I use HeatMapper, these show up as three different SSIDs, with different MAC addresses, all on the same channel. At first I thought maybe this would cause interference, but this seems to be the way the controller works;apparently, it automatically configures the channels to avoid interference from the other APs on the network.]

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• Time not propagating to machines on Windows domain

  - by rbeier

  We have a two-domain Active Directory forest: ourcompany.com at the root, and prod.ourcompany.com for production servers. Time is propagating properly through the root domain, but servers in the child domain are unable to sync via NTP. So the time on these servers is starting to drift, since they're relying only on the hardware clock. WHen I type "net time" on one of the production servers, I get the following error: Could not locate a time-server. More help is available by typing NET HELPMSG 3912. When I type "w32tm /resync", i get the following: Sending resync command to local computer The computer did not resync because no time data was available. "w32tm /query /source" shows the following: Free-running System Clock We have three domain controllers in the prod.ourcompany.com subdomain (overkill, but the result of a migration - we haven't gotten rid of one of the old ones yet.) To complicate matters, the domain controllers are all virtualized, running on two different physical hosts. But the time on the domain controllers themselves is accurate - the servers that aren't DCs are the ones having problems. Two of the DCs are running Server 2003, including the PDC emulator. The third DC is running Server 2008. (I could move the PDC emulator role to the 2008 machine if that would help.) The non-DC servers are all running Server 2008. All other Active Directory functionality works fine in the production domain - we're only seeing problems with NTP. I can manually sync each machine to the time source (the PDC emulator) by doing the following: net time \\dc1.prod.ourcompany.com /set /y But this is just a one-off, and it doesn't cause automated time syncing to start working. I guess I could create a scheduled task which runs the above command periodically, but I'm hoping there's a better way. Does anyone have any ideas as to why this isn't working, and what we can do to fix it? Thanks for your help, Richard

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• File transfer from MP3 player to computer

  - by JP

  I own an old 20GB Creative Zen jukebox (all external screws are gone on it LOL) and I would like to transfer files back to my PC to get them on my new iPod. Problem is, no matter what software I use (WinAMP, Creative Media Source or Windows Media Player), it just stops transferring files on my HD with an error message that says there is no more space on the destination folder. Problem is, there is still 320GB free. I tried lot of things like installing newer driver, latest Zen plug-in for Media Source, latest WinAMP version. Sometimes, it just works and then again, it stops working and I get this non-sense error. Restarting my PC sometime solves the issue by giving me enough time to transfer 10 or 15 more files and then I get the error again and again. Yesterday though I managed to transfer up to 3GB of MP3s on my computer before getting the error. Seems like I'm having a driver issue or a weird behavior from the player and/or the software I'm using. 3 different software can't reproduce the exact same issue by themselves so it must be something related to the driver. I can't find any post of any sort concerning such issue on old forums. Any idea?

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• Hard drive failed, suspected filesystem corruption, still cannot salvage any data from harddrive

  - by Hippy-Head

  Firstly, I am terribly sorry if this is a duplicate, but I couldn't find a similar issue to mine, so here goes. I have a 1TB hdd bought around 8 months ago used as backup hard drive. I have not used the drive for a period of time whatsoever, and when I was trying to get back to some files on it, it was completely wiped just like that. At first it would not boot I tried everything from command line chkdsk and filesystem recovery software to rebuilt it. After a few attempts I managed to initialize it, at that time it was an achievement. The problems started when I tried to recover the data inside, I have used A LOT of software free and commercial software on both Mac and Windows, with the help of cmd or Terminal commands, however no data of any kind was recovered, even after leaving it thoroughly scan for around 9-10 hours all night sometimes longer, with no results at all. I am somewhat desperate, I am usually good at retrieving data from corrupt hard drives, but this is not the case. Call me paranoid, but I do not want to give it to someone to fix it for me, as I have a lot of photos and personal stuff that I do not want anyone to see.

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• Wiping Deleted Directory Entries and Defragmenting Directories

  - by Synetech inc.

  Hi, I have seen plenty of apps that wipe free space on a disk (usually by creating a file that is as big as the remaining space) or defragment a file (usually by using the MoveFile API to copy it to a new contiguous area). What I have not seen however is a program that wipes the deleted directory entries. That is, when a file is deleted, its information (name, dates, etc.) remain in the directory, but are simply marked as empty. That leaves all kinds of information in a directory entry, and also wastes space since (at least on FAT drives), the directory may be using several clusters. For example, if a directory once had a lot of files, it will be expanded to use another cluster which could be anywhere on the disk. This means that the directory is fragmented, and may be using more clusters than needed, possibly with 100’s of unused (ie, “deleted file”) entries between active files. Does anyone know of a program that can defragment/consolidate directories (ie, wipe unused entries, and move active entries together)? (I would really rather not have to resort to writing my own yet again.) Thanks a lot. EDIT Sorry, I should have said, Windows and/or DOS, for FAT*/NTFS.

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• Multiple VM environment for developing/testing

  - by Hippo

  I was asked to create a setup for automated deployment, configuration, installation/updates of websites. A bunch of small websites will be bundled on one server. If more website will come up a new server will be created... I decided to us chef for this task. All servers will be running Ubuntu at the same version and configuration. The actual question: Everything needs to be tested properly before starting live deployment, so my question is: What is the best virtualisation tool to run multiple (5 - 10) virtual machines on a Ubuntu Laptop? Requirements: easy setup, fast (clone/snapshot of VMs) All VMs should be easily connected to the internet and should be able to communicate to each other (Open-Source / free would be great) So far I looked into: Virtual box is more for Desktop virtualisation, Cloning not possible, every new machine needs to be installed VMware Player Any suggestions? If there are any question about what I am doing please comment on this question, I will answer as soon as possible. This question is not about the actual set up, it is about a nice working environment.

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• Software for handling camera RAW-files

  - by Eikern

  I use a digital SLR as most other photographers do today and have quickly realised that capturing images using camera-RAW files is the way to go. Personally I use Adobe Lightroom to handle my photo library, but I know there are other software available like Apple Aperture. These applications are quite hard to use for a novice, and are quite expensive too. I've often recommended other photographers to switch to camera-raw, but they won't do it because Windows can't handle it natively. Are there any free or cheaper applications out there that can do simple file handling and adjustments? Preferably so simple that my mom can do it. I know Nikon offers a codec that allows you to view NEF-files natively inside Windows, but still limits the uses of the file and slows the system down if the file is big. Does anybody know of a drag-and-drop application that converts camera-raw to JPG on-the-fly? In case I or someone would need to upload an image to the web or use it inside a word-document. Thanks.

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• Easy solution to monitoring & blocking connections to non-malicious services, IP's, and tracking companies

  - by binarybunny

  Our family lives in the middle of nowhere, so the only high-speed internet available is Verizon's 3G mobile broadband. We have the highest package available, yet continually go over the 10GB limit and get charged $10 every 1GB we go over. We run a business from home, so stopping when we hit the limit is not an option. I've found the majority of connections are to Google, Microsoft, Akamai, Facebook, and other web service companies (mainly google). I know these are harmless connections, but when it costs money for them to monitor our web activity it becomes a serious problem. Here's some things I've done, but I'm sure there's something else that could help before blocking a huge set of IP ranges: stopped using windows (on my machine) use MVPS host file on all computers use firefox on all computers (with don't track me option) ad block plugin on all browsers blocking google updates blocking windows updates block images in browsers (when possible) use comodo (paranoia-level style of blocking..) virus-free computers with ESET NOD32 bought router and installed dd-wrt in attempt to block connections more diligently (and throttle bandwidth if it comes to that) Anything I'm missing? I know Google analytics is on almost all websites, as well as FB like buttons but I would like to be able to stop these connections without blocking use of google services like gmail, etc. Any ideas?

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• "cannot receive new filesystem stream: invalid backup stream" error when unpacking flash archive on solaris 10

  - by Bovril

  I've searched around but i'm having no luck with some peculiar behavior with a flash archive. I'm using HP Server Automation 9.14 to deploy the OS. I'm creating a Solaris 10 flash archive to create a snapshot default build in our environment. I create the flash archive with # flar create -c -S -n g8-solaris10-u10 g8-solaris10-u10.flar It seems to create the file without any problems (exit status 0). When deploying to a new system (same hardware), it extracts to a point and then bails. The last error in the log I can see is Extracted 2047.00 MB ( 82% of 2488.98 MB archive) ERROR: Could not read file (172.27.118.100:/media/opsware/sunos/flar/g8-solaris10-u10.flar ERROR: Errors occurred during the extraction of flash archive. The file /tmp/flash_errors contains the list of errors encountered ERROR: Could not extract Flash archive ERROR: Flash installation failed The error log contained the following message cannot receive new filesystem stream: invalid backup stream A previous version of this flash archive (1.8gb) worked ok, so I suspect size may be a factor. The source system (the one the flash archive is an image of) is an HP BL460C GEN8 some more info below. OS version Info # uname -a SunOS testhostname 5.10 Generic_147441-01 i86pc i386 i86pc # who -r . run-level 3 Oct 15 08:15 3 0 S disks # echo | format Searching for disks...done AVAILABLE DISK SELECTIONS: 0. c0t0d0 <DEFAULT cyl 17841 alt 2 hd 255 sec 63> /pci@0,0/pci8086,3c06@2,2/pci103c,3355@0/sd@0,0 Specify disk (enter its number): Specify disk (enter its number): zpools # zpool list NAME SIZE ALLOC FREE CAP HEALTH ALTROOT rpool 136G 24.6G 111G 18% ONLINE - Zones # zoneadm list -cv ID NAME STATUS PATH BRAND IP 0 global running / native shared The file size of 2047 seems suspiciously close to 2048, which is concerning. Any help would be greatly appreciated. Thanks

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