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  • Can't get IPv6 address using radvd on wireless interface on windows, wired works fine.

    - by AndrejaKo
    I set up my router to use OpenWRT and set it up to use IPv6 using a tunnel form SixXs. I'm having problems with stateless autoconfiguration using radvd. On my computer, wired connection can get its IPv6 address fine, but wireless can't. After spending some time on OpenWRT forums, I'm pretty much sure now that router is set up fine and that the problem is with my windows settings. Also, I do not have any problems getting IPv6 address on openSUSE 11.3. So what should I do to solve this and what information should I post? Here's radvdump output for wired interface: interface br-lan { AdvSendAdvert on; # Note: {Min,Max}RtrAdvInterval cannot be obtained with radvdump AdvManagedFlag on; AdvOtherConfigFlag on; AdvReachableTime 0; AdvRetransTimer 0; AdvCurHopLimit 64; AdvDefaultLifetime 1800; AdvHomeAgentFlag off; AdvDefaultPreference medium; AdvSourceLLAddress on; prefix 2001:15c0:67d0::/64 { AdvValidLifetime 86400; AdvPreferredLifetime 14400; AdvOnLink on; AdvAutonomous on; AdvRouterAddr off; }; # End of prefix definition }; # End of interface definition Here's radvdump output for wireless interface: # # radvd configuration generated by radvdump 1.6 # based on Router Advertisement from fe80::a0b7:deff:fef0:5b34 # received by interface br-lan # interface br-lan { AdvSendAdvert on; # Note: {Min,Max}RtrAdvInterval cannot be obtained with radvdump AdvManagedFlag on; AdvOtherConfigFlag on; AdvReachableTime 0; AdvRetransTimer 0; AdvCurHopLimit 64; AdvDefaultLifetime 1800; AdvHomeAgentFlag off; AdvDefaultPreference medium; AdvSourceLLAddress on; prefix 2001:15c0:67d0::/64 { AdvValidLifetime 86400; AdvPreferredLifetime 14400; AdvOnLink on; AdvAutonomous on; AdvRouterAddr off; }; # End of prefix definition }; # End of interface definition # # radvd configuration generated by radvdump 1.6 # based on Router Advertisement from fe80::a0b7:deff:fef0:5b34 # received by interface br-lan # interface br-lan { AdvSendAdvert on; # Note: {Min,Max}RtrAdvInterval cannot be obtained with radvdump AdvManagedFlag on; AdvOtherConfigFlag on; AdvReachableTime 0; AdvRetransTimer 0; AdvCurHopLimit 64; AdvDefaultLifetime 1800; AdvHomeAgentFlag off; AdvDefaultPreference medium; AdvSourceLLAddress on; prefix 2001:15c0:67d0::/64 { AdvValidLifetime 86400; AdvPreferredLifetime 14400; AdvOnLink on; AdvAutonomous on; AdvRouterAddr off; }; # End of prefix definition }; # End of interface definition

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  • Will wear induced by turning computers off in the evening be offset by energy savings?

    - by sharptooth
    I'm asking this here because this is primarily a huge office scenario and administrators will more likely have the answer I'm looking for. Employees' desktop computers can be either left turned on for the whole night or switched off in the evening and turned back on in the morning. The latter will surely save energy. In the same time turning on and off is very harmful for the equipment - hardware often breaks specifically when turned on. Both energy and hardware replacements cost money. With energy it's quite obvious - you pay every month according to what your power meter shows. With hardware replacements it's worse - you need qualified stuff to quickly diagnose the problems and once something breaks the affected employee will have to wait for some time while his computer is fixed/replaced and the data is recovered. So the company has to choose between saving money on energy and saving money on computer maintaince and lost hours. Such decisions must be well though. Is there any detailed study of how turning computers off each evening affects their lifetime?

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  • RAID 10 or RAID 5 for multiple VMs - what is the best choice?

    - by Lars Fastrup
    I have just ordered a new rig for my business. We do a lot of software development for Microsoft SharePoint and need the rig to run several virtual machines for development and test purposes. We will be using the free VMware ESXi for virtualization. For a start, we plan to build and start the following VMs - all with Windows Server 2008 R2 x64: Active Directory server MS SQL Server 2008 R2 Automated Build Server SharePoint 2010 Server for hosting our public Web site and our internal Intranet for a few people. The load on this server is going to be quite insignificant. 2xSharePoint 2007 development server 2xSharePoint 2010 development server Beyond that we will need to build several SharePoint farms for testing purposes. These VMs will only be started when needed. The specs of the new rig is: Dell R610 rack server 2xIntel XEON E5620 48GB RAM 6x146GB SAS drives Dell H700 RAID controller We believe the new server is going to make our VMs perform a lot better than our existing setup (2xIntel XEON, 16GB RAM, 2x500 GB SATA in RAID 1). But we are not sure about the RAID level for the new rig. Should we go for having the the 6x146GB SAS drives in a RAID 10 configuration or a RAID 5 configuration? RAID 10 seems to offer better write performance and lower risk of a RAID failure. But it comes at a cost of less drive space. Do we need RAID 10 or would RAID 5 also be a good choice for us?

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  • Turn computer into DAS (Direct Attached Storage)

    - by Damon
    Can we build a direct attached storage by taking a computer/server, adding an HBA, and installing some appropriate software? We would use Debian as a host OS for both the DAS and the server. If so, what software do we use? And do we simply need a HBA for the DAS and the Server? Or do we need more hardware? The goal is to use an older server that does not have enough room for drives but does have ECC memory, server processors, redundant power supplies, dual nics, etc. Then find any boxes, server or not, the key being having enough room for 8-12 drives, fans, etc. and turning them into a DAS; build two of these DAS's and have them connected to the server. Eventually we want to have two servers using DRBD and associated services like heartbeat and pace maker to create an HA setup for our server(s) but that will take a long time to configure since I have no experience with anything related to DRBD (yet) and have a learning curve I have to get past, not to mention the additional cost of more hardware (two servers vs one).

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  • Php5-fpm Crash if much visitors

    - by chillah
    I decided to change my OP to Nginx from Litespeed because i read much about the low resource that Nginx would cost. Im running a Wordpress site with 500 users online My www.conf in "/etc/php5/fpm/pool.d" pm.max_children = 200 pm.start_servers = 20 pm.min_spare_servers = 20 pm.max_spare_servers = 60 ;pm.process_idle_timeout = 10s; ;pm.max_requests = 1000 Since i changed that config to higher requests and more children the Site needs longer till it shows me a White blank page. If i restart the php5-fpm prozess then, the site is running fine again. The CPU usage is at 5% if the php5-fpm is crashed and if its running its about 20 to 90%! Heres my Nginx.conf: user www-data; worker_processes 2; pid /var/run/nginx.pid; events { worker_connections 3048; # multi_accept on; } http { ## # Basic Settings ## sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; # server_tokens off; I already tried changing the settings, tryed all variants but nothing worked. The Mashine: Dualcore 4gb ram

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  • Docking Station Sound Doesn't Work on Dell D830 with Windows 7

    - by cisellis
    EDIT: I can only mark one answer as the correct one but the actual solution was a combination of two comments (updating the BIOS to A15 AND installing the Sigmatel audio drivers). I have a Dell Latitude D830 laptop that is running Windows 7 Enterprise x64. I connect to a docking station during the day with multiple monitors, a keyboard and a mouse. Everything runs with no problems including most of the docking station ports (usb, monitors, etc.) However, the sound port from the docking station does not work since the upgrade to Windows-7. Even with the laptop plugged in, the sound always comes out of the laptop, not the headphones plugged into the docking station. Here's what I've tried: I've seen other issues like via Google this that seem to be mostly unanswered. I found one or two that referenced using the Vista x64 drivers, especially the Nvidia drivers. I do not have an Nvidia chipset but I've reinstalled the sound drivers and that has not helped. I don't have a support contract and considering the cost is usually high to call Dell, that's not an option. Dell's forums are pretty much a wasteland and I've found no help there. Since this is a docking station I thought I might need to try the SATA or Intel chipset drivers from the dell site instead, however I'm not really sure and I need to work on this laptop in the meantime. I can't really afford the downtime to experiment with random drivers all day in case they turn out to be incompatible (Dell still hasn't added Windows 7 to their support site as far as I can tell). Does anyone have any other ideas? Has anyone had this issue and solved it? If so, how? Thanks in advance for your help.

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  • my cpu won't start. all fan were spinning for a second then nothing happen

    - by Tommy
    I need help about this.. I'm from Malaysia.. Back then my cpu is all okay..and it's 4 year old.. I think this question is answered before but i'm still don't understand.. when i plugged my cpu..turn it on and all of the fan (graphic card, mobo fan and PSU fan) were spinning just for a second than nothing happen.. I don't know if it is because of the PSU or my mobo.. I sent my cpu to the shop and they said it must be the mobo.. They tell me to change my mobo and PSU also..and it cost over 100 buck (rm300 in Malaysia). and i'm real 'dry' right now. My whole data is inside the HDD. School projects, photos, games, and many..I really-really need my cpu back alive.. My mobo is MSI MS-7529 with dual core chips. My PSU is ATX-480W. the PC store guy said i need to change to new ASUS mobo if I want. I dont know what type it is but Then he tell me to change my PSU also because he don't think my old PSU (ATX-480W) ain't compatible to the new mobo.. I was very need a help from you techie guys.. sorry for my terrible English..

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  • Hosting multiple websites from home

    - by dean nolan
    I have just been accepted for Microsofts Wevsite Spark program which I mainly got for the tools, Visual Studio, Blend. I also have a few of my own websites, personal and a couple of business ones. I also work freelance and sometimes I would like a place to just put a demo up of a clients project. The websites I currently have are all on differnet hosting provders and domain registrars. The WebsiteSpark comes with Windows Server 2008 and SQL Server 2008. It would be really advantagous of me to have all these in one place but also so I have complete control over the database and the environment. So I am thinking over the next 4-6 months of migrating all this to my own server that I will host from home, or maybe even setup at home and then store in a proper datacentre. I was wondering what steps I should take and what to be aware of, specifically: 1) having all these different websites on one computer and having the url got to the proper place. 2) Cost effectiveness? Having the server in home as apposed to datacentre. Most solutions I see charge over £1000 a month to have a machine in datacentre. This is mostly for my own ease of management and shared hosting which I currently have is very limited configuration wise. Would getting a server in house be beneficial for then upgrading to the cloud? What measures should I take with my ISP? I know this is a lot I've asked but just even links to good articles would be good. Thanks

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  • Replacing the LCD panel in a netbook (Asus Eee PC 1005)

    - by neilfein
    Yesterday, I was cleaning up and dropped my Asus Eee 1005PE. The screen is cracked inside (i.e., cracks are visible only when on), and no longer works properly. I booted up with another monitor attached, and the computer itself is fine, but needs a new screen. Best Buy wants at least $250 to repair it (that includes their $150 fee to breathe in the same room as the unit), and Asus was of no help at all. (They're incredibly cagey and won't provide any money numbers at all, not even the cost of the part.) If replacing the LCD is no more trouble than replacing memory or a hard drive, I can do that. It's within my means to buy the part (18G241010402, a TFT LCD), but I'd like to know more about the procedure involved. My question: How does one replace the screen in this unit? Do I simply open the case and swap out the unit, or do I need to disassemble anything else to get to the screen? I don't want to order the part and then end up in a situation like this. Is the case screwed shut, or is it like an iPod where they glue things closed? I know enough about my abilities with a soldering gun to not attempt to solder tiny wires, would any of that be involved?

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  • EC2 Auto-Scaling with Spot and On-Demand Instances?

    - by platforms
    I'm looking to optimize the cost of our auto-scaling EC2 groups by having them launch spot instances instead of on-demand instances. What I really want is to be able to keep some servers in the group as on-demand instances, regardless of what happens to the spot instance pricing market. Then I want any additional servers in the group, above my configured minimum, to be spot instances. I'm generally OK with the delay in adding servers via spot requests. I can't seem to find any way to do this and I've tried to scour the AWS documentation. It appears that an ASG can either be on-demand or spot, but not a hybrid. I could possibly manually add an on-demand instance to the Elastic Load Balancer assigned to the auto-scaling group, but then the load of that server would not be factored into the auto-scaling measurements and triggers. I suppose I could enter a ridiculously high bid price in order to ensure that I always get the servers I need, but then I look at the pricing history and see occasional large spikes. The AWS documentation is at odds with itself, since in one place it says that if you enter a server minimum, that number is "ensured" to be there. But then when you read about spot instances, there are no assurances. The price differential for spot is compelling, so I'd like to leverage that as much as I can while still maintaining an always-on baseline. Is this possible?

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  • Need Help Scoping a Server to use for study (MCITP Ent Admin + SharePoint 2010)

    - by AVFamily76
    i need to study for mcitp, but i also need to study for sharepoint 2010 i have a poweredge 1850 with two single-core CPUs + two 73G drives - it kills me on electricity, so don't want to use it, and it won't do VT, but it could be one of three boxes for a lab that's cheap, but will cost a lot on electricity i was thinking . . . OPTION #1 Opteron 4170 HE (50 watt chip), 6-core, only two-bills ($200), but the board's are $250, so that's an $800 box, then get another box to dual-boot Win7/Hyper-V on the cheap...? OPTION #2 Used Quad - but how many VM's that are really banging away could it run at same time? (Server 2008r2, SQL 2008r2, Search Server) OPTION #3 Study from books and just get one box that can run two VM's at same time, even if slowly. the last time i had and used a home lab was five years ago when i had a DC, SQL, Exchange and business app box, that's where i got my server skills was just banging on it for four years, but didn't read any books, so now i have to get certified and know the material, and just am not sure how much attention i should pay to the box i use versus the studying time and reading. sorry it's a subjective question, and am obviously open to all sorts of abuse here, but hope you can tell me also how many VM's i can run at the same time given what they'll be doing (SQL and SharePoint FAST search server are resource hungry) thanks!

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  • Offloading backups to secondary network

    - by user1467163
    I'm trying to solve a problem- Currently, we are constantly backing up and have no budget for additional servers. Our production network is still a 10/100 and handles voip, SQL plus our backup traffic, and I'd like to offload the backup traffic onto a secondary network- all of our servers have secondary NIC's that are not in use, and all support gigabit (Our switching hardware does not- a topic for another day). I'd like to move my backups off the production network, but I am having a hard time getting the computers to communicate. I am using a Netgear GS724T switch for the backup network- Chosen for cost and because I have used them extensively on networks saturated with ghosting traffic, so I know it's up to the task. I have defined a VLAN, with ports that are not members of any other VLAN. All traffic is untagged on the VLAN. I have set the servers with 192.168.1.10 and 192.168.1.11 addresses, 255.255.255.0 netmask and I have tried a blank GW, using the local IP of the server 192.168.1.whatever address, and I have tried using the switch's production-side IP as the GW. The machines cannot find each other. DNS addresses are blank because I am going purely by IP for now... Any ideas how to get these machines to talk? they are Windows machines, running Server 2008R2 and 2003R2. Thanks!

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  • Provider claiming "all web servers in the cloud are automatically kept in sync" - should I be skeptical?

    - by RobMasters
    I'm no expert in cloud computing - I've spent a fair bit of time researching it and various providers but am yet to get any hands-on experience with it. From what I've read about AWS and auto-scaling EC2 instances though, it seems as though each instance should be completely decoupled from all other instances. i.e. If content is uploaded to the web server's local filesystem from a custom CMS backend then that content won't be available if subsequently requested from a different web server in the auto-scaling group. Is that right? I met with a representative of our existing hosting provider recently and he was claiming that it isn't a problem that our legacy CMS system is highly dependent on having a local filesystem. He said that all web servers, regardless of how many, would be kept as exact duplicates so I shouldn't notice any difference compared to our existing setup of a single dedicated server. This smells a little too much like bull fecal-matter to me...should I be skeptical about this? I'm a little worried because my (non-technical) boss who ultimately makes the decisions is all for signing up to this cloud solution because it won't require any extra work. I'm sure that they must at least be able to provide this, otherwise they wouldn't be attempting to sell it to us. But at what cost? It sounds as though each web server will always need to be checking the other web server(s) for new static content, which to me sounds like unwanted overhead that'll slow things down. I'd really appreciate it if somebody could clear this up to me. I'm all for switching to AWS and using S3+CloudFront for all static content, but that isn't looking very likely to happen at the moment.

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  • Routing public IPs (each a /32) through a VPN to another server

    - by Lee S
    Hopefully the title makes sense; I have a server currently in a colo facility, with many IP addresses routed to it. They are individual IPs and not in a contiguous block. Due to vastly improved connectivity (fibre) at home I am slowly bringing my infrastructure in-house for managability and eventually, cost savings. What I would like to do though is use the IP addresses allocated to my existing server, at home. I have an IP block allocated to me on my new ISP connection, but for a couple of reasons I'd like to make use of the colo ones for now: Ease of transition - lots of domains, dns, hard-coded IPs in programs, etc. Connectivity fallback. If my primary line goes down and switches to fallback 1 (dsl) or fallback 2 (4G), I lose access to the ISP-allocated IP block of IPs that are only presented on the primary WAN interface. What I'd like to achieve is my home virtualisation server (Proxmox/Debian-based) "dials in" to the colo server in the colo facility (also Proxmox/Debian) via VPN or similar, and gets to make use of the IP addresses that currently terminate on the colo box. If the primary connection to my ISP goes down and one of the fallback routes kicks in, the VPN tunnel will just time out and then be re-established on the backup connection instead. I'm sure this is doable, but I have no idea how. I'm not afraid to get my hands dirty, I just don't really know where to start?

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  • Suggestions for Backup solution

    - by jiewmeng
    i am considering between windows home server simple nas extra HDD's in desktop btw, i will be the main user i am looking to fulfil the following needs: reliability (i am think RAID 1 or 5) not so prone to virus/malware infections (will using a separate NAS or home server help? say windows home server is still a windows pc except separated by network?) power efficiency (eg. spin down when not in use) download (eg. i may want to dl big files/torrents overnight and i may not want to use a full powered PC for it? does a full pc vs NAS provide significant power usage to justify cost of new system esp. since i am only user?) performance (i guess i like to write/access my files fast, on 2nd thought, maybe for backup i can forgo this? maybe for a WD Green HDD? but how much slower will it be? plus since i am the only user, i think the whole HDD will be mine?)

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  • Distributed and/or Parallel SSIS processing

    - by Jeff
    Background: Our company hosts SaaS DSS applications, where clients provide us data Daily and/or Weekly, which we process & merge into their existing database. During business hours, load in the servers are pretty minimal as it's mostly users running simple pre-defined queries via the website, or running drill-through reports that mostly hit the SSAS OLAP cube. I manage the IT Operations Team, and so far this has presented an interesting "scaling" issue for us. For our daily-refreshed clients, the server is only "busy" for about 4-6 hrs at night. For our weekly-refresh clients, the server is only "busy" for maybe 8-10 hrs per week! We've done our best to use some simple methods of distributing the load by spreading the daily clients evenly among the servers such that we're not trying to process daily clients back-to-back over night. But long-term this scaling strategy creates two notable issues. First, it's going to consume a pretty immense amount of hardware that sits idle for large periods of time. Second, it takes significant Production Support over-head to basically "schedule" the ETL such that they don't over-lap, and move clients/schedules around if they out-grow the resources on a particular server or allocated time-slot. As the title would imply, one option we've tried is running multiple SSIS packages in parallel, but in most cases this has yielded VERY inconsistent results. The most common failures are DTExec, SQL, and SSAS fighting for physical memory and throwing out-of-memory errors, and ETLs running 3,4,5x longer than expected. So from my practical experience thus far, it seems like running multiple ETL packages on the same hardware isn't a good idea, but I can't be the first person that doesn't want to scale multiple ETLs around manual scheduling, and sequential processing. One option we've considered is virtualizing the servers, which obviously doesn't give you any additional resources, but moves the resource contention onto the hypervisor, which (from my experience) seems to manage simultaneous CPU/RAM/Disk I/O a little more gracefully than letting DTExec, SQL, and SSAS battle it out within Windows. Question to the forum: So my question to the forum is, are we missing something obvious here? Are there tools out there that can help manage running multiple SSIS packages on the same hardware? Would it be more "efficient" in terms of parallel execution if instead of running DTExec, SQL, and SSAS same machine (with every machine running that configuration), we run in pairs of three machines with SSIS running on one machine, SQL on another, and SSAS on a third? Obviously that would only make sense if we could process more than the three ETL we were able to process on the machine independently. Another option we've considered is completely re-architecting our SSIS package to have one "master" package for all clients that attempts to intelligently chose a server based off how "busy" it already is in terms of CPU/Memory/Disk utilization, but that would be a herculean effort, and seems like we're trying to reinvent something that you would think someone would sell (although I haven't had any luck finding it). So in summary, are we missing an obvious solution for this, and does anyone know if any tools (for free or for purchase, doesn't matter) that facilitate running multiple SSIS ETL packages in parallel and on multiple servers? (What I would call a "queue & node based" system, but that's not an official term). Ultimately VMWare's Distributed Resource Scheduler addresses this as you simply run a consistent number of clients per VM that you know will never conflict scheduleing-wise, then leave it up to VMWare to move the VMs around to balance out hardware usage. I'm definitely not against using VMWare to do this, but since we're a 100% Microsoft app stack, it seems like -someone- out there would have solved this problem at the application layer instead of the hypervisor layer by checking on resource utilization at the OS, SQL, SSAS levels. I'm open to ANY discussion on this, and remember no suggestion is too crazy or radical! :-) Right now, VMWare is the only option we've found to get away from "manually" balancing our resources, so any suggestions that leave us on a pure Microsoft stack would be great. Thanks guys, Jeff

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  • 150 TB and growing, but how to grow?

    - by seandavi
    My group currently has two largish storage servers, both NAS running debian linux. The first is an all-in-one 24-disk (SATA) server that is several years old. We have two hardware RAIDS set up on it with LVM over those. The second server is 64 disks divided over 4 enclosures, each a hardware RAID 6, connected via external SAS. We use XFS with LVM over that to create 100TB useable storage. All of this works pretty well, but we are outgrowing these systems. Having build two such servers and still growing, we want to build something that allows us more flexibility in terms of future growth, backup options, that behaves better under disk failure (checking the larger filesystem can take a day or more), and can stand up in a heavily concurrent environment (think small computer cluster). We do not have system administration support, so we administer all of this ourselves (we are a genomics lab). So, what we seek is a relatively low-cost, acceptable performance storage solution that will allow future growth and flexible configuration (think ZFS with different pools having different operating characteristics). We are probably outside the realm of a single NAS. We have been thinking about a combination of ZFS (on openindiana, for example) or btrfs per server with glusterfs running on top of that if we do it ourselves. What we are weighing that against is simply biting the bullet and investing in Isilon or 3Par storage solutions. Any suggestions or experiences are appreciated.

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  • Standing and sitting while using a computer at work

    - by Adam Batkin
    I would like to be able to comfortably switch between sitting and standing while at work (I'm a software developer, so I spend most of my day in front of a computer). For the past couple of months I have been using a large elevated stand that sits on my desk (designed expressly for this purpose) containing my keyboard and mouse, and my monitors have been raised as high as possible and aimed upwards. So I can stand all day and I'm pretty comfortable (my right wrist may be at too much of an angle when it's on my mouse, but that's a separate issue). The only problem is that sometimes I want to be able to sit. I can easily place my keyboard and mouse back down under the elevated stand, but I have to look up pretty steeply and that is uncomfortable and makes it difficult to see the screens since they are tilted upwards. My monitor mounts are difficult to adjust quickly/easily, so I can't just re-aim them. I would of course love one of those hydraulic standing/sitting desks (cost isn't the problem). But I'm in a row of "trader-style" desks where it's basically a very long surface with people sitting at 6-foot intervals. What type of equipment do you recommend? I suppose the best thing would be some sort of monitor stand (it must be able to hold 2-3 LCDs) that can easily be lowered and raised. But any other suggestions are also welcome.

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  • Recommended drive encryption solution

    - by Chris Driver
    Hello, I will soon be purchasing a number of laptops running Windows 7 for our mobile staff. Due to the nature of our business I will need drive encryption. Windows BitLocker seems the obvious choice, but it looks like I need to purchase either Windows 7 Enterprise or Ultimate editions to get it. Can anyone offer suggestions on the best course of action: a) Use BitLocker, bite the bullet and pay to upgrade to Enterprise/Ultimate b) Pay for another 3rd party drive encryption product that is cheaper (suggestions appreciated) c) Use a free drive encryption product such as TrueCrypt Ideally I am also interested in 'real world' experience from people who are using drive encryption software and any pitfalls to look out for. Many thanks in advance... UPDATE Decided to go with TrueCrypt for the following reasons: a) The product has a good track record b) I am not managing a large quantity of laptops so integration with Active Directory, Management consoles etc is not a huge benefit c) Although eks did make a good point about Evil Maid (EM) attacks, our data is not that desirable to consider it a major factor d) The cost (free) is a big plus but not the primary motivator The next problem I face is imaging (Acronis/Ghost/..) encrypted drives will not work unless I perform sector-by-sector imaging. That means an 80Gb encrypted partition creates an 80Gb image file :(

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  • Application that will identify percentage of your system disk bandwidth used on a user-application by user-application basis?

    - by Warren P
    I always (subjectively) feel my computer is far too slow (however fast it is), and so I'm always looking for ways to measure and understand what my computer is actually doing, that is making it seem "slow" to me. It has been my observation that my software-developer workload is most often disk-bound (I am waiting for Disk I/O) more than CPU bound. What has made it worse, is that I am using a corporate PC that has in-memory active-scanning anti-virus software that I do not have control over, and also some IT department mandated services that seem to suck up a lot of available hard-disk bandwidth. The best tool I have seen (in Windows 7) is the Resource Monitor which I usually acess from the button in the task Manager. The disk IO page, however, seems to label Disk Activity at a very low level (for example, showing the Volume Shadow Storage, which is flushing information obviously written by something ELSE other than VSS itself, and then writes to Pagefile.sys, which are obviously due to Virtual Memory faults in some application). What I would like to know is if a utility exists that can add up all direct disk input and output by user-level process, or find the process or service that caused VM or VSS activity. In that way, I hope, you could establish a real idea of how much of your computer's precious disk subsystem bandwidth is attributable to a particular application. here's a scenario: MyApp.exe writes 100k/s and reads 100k/s directly. VSS ends up writing another 100k/s. pagefaults caused inside MyApp.exe cause another 100k/s of writes. So the total "cost" of MyApp.exe running, during a period of time (let's say 1 second) is 400k/s, whereas you can only directly observe half of that, in Resource Monitor. Is there a smarter disk-IO watching piece of software I can use?

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  • Block SMTP connections from mail domains which don't themselves accept SMTP connection.

    - by bignose
    I'm administrating a mail service for a small business. Their mail host's internet connection is an ADSL service with a permanent IP address. Unfortunately, many misconfigured mail systems will happily deliver to this host, but, when the host attempts to send mail back (e.g. a bounce notice, or a normal response from someone), the original sender refuses to receive connections from this host. That misconfiguration makes their system a one-way mail sender, which is a problem. How can I configure Postfix on this customer's mail host to refuse SMTP sessions that declare a sender domain which itself refuses SMTP from this host? That is, if the SMTP client declares a domain that we can't make SMTP connections back to, then there's not much point accepting the incoming connection in the first place. I'm imagining a late check (after the low-cost checks to winnow most of the rubbish connections) that keeps the client on the other end while it attempts an SMTP client connection back to the declared domain of the sender. If that connection is rejected, the incoming one is also rejected. I'm also open to other suggestions for how this problem might be addressed (short of not using this mail host at all, which isn't an option).

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  • How can I duplicate HBCD's XP boot loader with my MBR?

    - by Warpstone
    I'm stumped. I'm migrating a Win XP Lenovo T500 to an SSD: I copied the XP partition using EaseUS to the SSD. Aligned the boot sector using Gparted The MBR needs to be rebuilt (fair enough) However, all attempts to use the Windows Recovery console hang (both via a boot CD and even when the console was installed as a boot option). I've tried using a bunch of tools to rebuild/replace the MBR, but no dice. They all say the MBR has been fixed, but I cannot load Windows from the SSD. The HBCD's boot from windows option works just fine however. I'm confused as to what HBCD can do that my drive can't. How can I get that functionality on my SSD? Is it a MBR fix I can mirror? The SSD is extremely fast when I do use HBCD to boot up... but it would be nice to not need a token-based access to the machine! :) Note: I know, windows 7 may be worth a fresh install, but I'm trying to avoid the cost and hassle if possible.

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  • Recommendation for a simple no-frills Windows PDF printer driver?

    - by Scott Bussinger
    I'm looking for an extremely simple Windows PDF printer driver that I can recommend to clients. Ideally it would have these characteristics: When you print something, it should just create it as a temporary file and then display it in their default PDF viewer with no prompting. If they want to save it, they can save it manually from inside the viewer. This workflow should be with no special post-install configuration. Installation should be very simple. A double click the installation program and click "Finish" sort of thing. No complicated multi-step installation, no asking questions your grandmother wouldn't know the answer to (preferably no questions at all), no extra crap being installed. An option for a completely silent installation would be nice, but not necessary. Ideally it would be free to simplify their installing on a small network, but low cost is an option. I've tried a quite a few but none really fit the bill. Some can achieve the first goal but only after careful configuration, some try to install extra toolbars, some have other installation complexities that would make it hard for extremely novice users to succeed. Any suggestions? Thanks!

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  • Disaster Recovery Standby Server

    - by user64300
    Hi, I work for a small business with 25 users and 2 servers. 1 server is the DC running Windows Server 2003/Exchange 2003. We want a reliable disaster recovery strategy for this server without having to spend a lot of money. We take regular backups but I have been advised that only an identical server will allow them to be restored easily. I'm trying to come up with a solution that means we don't have to buy two servers at twice the cost everytime we upgrade. I'm toying with the idea of upgrading our DC more frequently (say every 3 years) and then using the old server as the recovery server (temporarily - until we can source a replacement server). However, I won't know whether the backups will restore on the old server until I try it! We're planning to upgrade to Server 2008R2 in the near future so I'm hoping the backup tools will give me some success in restoring to different hardware (or perhaps I can use hyper-v if not). So what I am wondering is whether it is a idea to use old hardware as a disaster recovery strategy (providing we regular test it obviously!).

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  • What are the typical methods used to scale up/out email storage servers?

    - by nareshov
    Hi, What I've tried: I have two email storage architectures. Old and new. Old: courier-imapds on several (18+) 1TB-storage servers. If one of them show signs of running out of disk space, we migrate a few email accounts to another server. the servers don't have replicas. no backups either. New: dovecot2 on a single huge server with 16TB (SATA) storage and a few SSDs we store fresh mails on the SSDs and run a doveadm purge to move mails older than a day to the SATA disks there is an identical server which has a max-15min-old rsync backup from the primary server higher-ups/management wanted to pack in as much storage as possible per server in order to minimise the cost of SSDs per server the rsync'ing is done because GlusterFS wasn't replicating well under that high small/random-IO. scaling out was expected to be done with provisioning another pair of such huge servers on facing disk-crunch issues like in the old architecture, manual moving of email accounts would be done. Concerns/doubts: I'm not convinced with the synchronously-replicated filesystem idea works well for heavy random/small-IO. GlusterFS isn't working for us yet, I'm not sure if there's another filesystem out there for this use case. The idea was to keep identical pairs and use DNS round-robin for email delivery and IMAP/POP3 access. And if one the servers went down for whatever reasons (planned/unplanned), we'd move the IP to the other server in the pair. In filesystems like Lustre, I get the advantage of a single namespace whereby I do not have to worry about manually migrating accounts around and updating MAILHOME paths and other metadata/data. Questions: What are the typical methods used to scale up/out with the traditional software (courier-imapd / dovecot)? Do traditional software that store on a locally mounted filesystem pose a roadblock to scale out with minimal "problems"? Does one have to re-write (parts of) these to work with an object-storage of some sort - such as OpenStack object storage?

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