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• Using 2-port LSI 2308-8e card to control 24 SAS HDDs

  - by GregC

  I would like to rely on a RAID-on-chip solution to control 24 SAS hard drives in a direct-attached environment. How would you approach this to get best bandwidth given that I'd like to spend less than $10,000 on the interconnect. I've read that LSI 2308 chip can easily handle 8-drive SSD RAID6 in hardware. I'd like to harness its power to control 24 SAS hard drives over an expander in an external enclosure. Currently I use an Infortrend S24S-G2240 external enclosure. It provides its own controller and expander. I'd like to use LSI 2308 controller for RAID6 somehow instead of the mystery controller in the enclosure. P.S. I tried to create SAS-expander as a tag, but my rep on this site is low.

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• Cloud Computing - Multiple Physical Computers, One Logical Computer

  - by bundini

  I know that you can set up multiple virtual machines per physical computer. I'm wondering if it's possible to make multiple physical computers behave as one logical unit? Fundamentally the way I imagine it working is that you can throw 10 computers into a facility one day. You've got one client that requires the equivalent of two computers worth, and 100 others that eat up the remaining 8. As demands change you're just reallocating logical resources, maybe the 2 computer client now requires a third physical system. You just add it to the cloud, and don't worry about sharding the database, or migrating data over to a new server. Can it work this way? If yes, why would anyone ever do things like hand partition their database servers anymore? Just add more computing resources. You scale horizontally with the hardware, but your server appears to scale vertically. There's no need to modify your application's supporting infrastructure to support multiple databases etc.

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• Cloud Computing - Multiple Physical Computers, One Logical Computer

  - by Koobz

  I know that you can set up multiple virtual machines per physical computer. I'm wondering if it's possible to make multiple physical computers behave as one logical unit? Fundamentally the way I imagine it working is that you can throw 10 computers into a facility one day. You've got one client that requires the equivalent of two computers worth, and 100 others that eat up the remaining 8. As demands change you're just reallocating logical resources, maybe the 2 computer client now requires a third physical system. You just add it to the cloud, and don't worry about sharding the database, or migrating data over to a new server. Can it work this way? If yes, why would anyone ever do things like partition their database servers anymore? Just add more computing resources. You scale horizontally with the hardware, but your server appears to scale vertically. There's no need to modify your application's infrastructure to support multiple databases etc.

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• How can I login to Ubuntu using a USB serial port?

  - by marc

  How can enable remote terminal login into Ubuntu 9.10 using a USB serial port? I created device /dev/ttyUSB0 and i want to allow logins using Hyper-Terminal. I found some resources but they are related to real hardware rs232 ports. I can't find any information about USB converter. So far I have established connection between that USB-serial port and my laptop. I can send text to the port (cp sometext.txt /dev/ttyUSB0) and read it using hyperterminal. What do I need to do to enable logins on this port?

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• arcserve vs backup exec vray

  - by Luigi

  I have to buy one backup software to backup a vmware environment with the following server/applications: mixed microsoft windows 2003/2008/2012 server standard environment sql server 2005/2008 mixed linux centos/ubuntu servers postgresql sap environment exchange 2007 linux fileservers windows fileservers active directory random applications/sqlserver/fileserver on workstations xp/7/8 my hardware is: 5 blades on ibm bladecenter, various san, lto4 on 4gbit fiber channel connected to a windows2003 blade where I will install the backup software (backupexec or arcserve). What are your advice and comments over backupexec vray or arcserve choice ? I know that arcserve have a lower price. I used backup exec for some years but I found it pretty complicated. Thank you.

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• Expanding Files 0%, error 0x80070017 Windows 7 x64 RTM

  - by Liam

  I have downloaded Windows 7 x64 from MSDN. I have checked the hash of the file and it is correct. I have them made a bootble USB stick (http://kmwoley.com/blog/?p=345 (had to use my vista bootsect.exe as running 32bit at the moment). When I boot from the USB it fails when expanding the file. It stays on 0% and fails after around 90 seconds. The error is 0x80070017. As the hash is correct and I am using USB I guess it could be a hardware problems. Any advice how to get Windows 7 installed? The machine is a Dell Studio Slim.

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• No audio input deviced are installed

  - by Meowbits

  If I go to Sound Recording Devices and it says "No audio devices are installed" If I click to set up a microphone I get an error "Wizard could not launch, No audio input device found, make sure your audio hardware is working properly and check your audio configuration in the Audio Devices and Sound Themes control panel. Where can I get an audio input device? I just want something so I can actually use the microphone on my headset. This is ridiculous. I have tried to look for any file but I simply cannot find a way to add an audio input device... I really do not want to format my computer just for this problem but I am starting to feel like that is the only option I have. I have the latest chipsets

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• Virtualized CPU cores vs. threads

  - by nedm

  We've got a KVM host system on Ubuntu 9.10 with a newer Quad-core Xeon CPU with hyperthreading. As detailed on Intel's product page, the processor has 4 cores but 8 threads. /proc/cpuinfo and htop both list 8 processors, though each one states 4 cores in cpuinfo. KVM/QEMU also reports 8 VCPUs available to assign to guests. My question is when I'm allocating VCPUs to VM guests, should I allocate per-core or per-thread? Since KVM/QEMU reports the server has 8 VCPUs to allocate, should I go ahead and set a guest to use 4 CPUs where I previously would have set it to use 2 (assuming 4 total VCPUs available)? I'd like to get the most possible out of the host hardware without over-allocating.

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• Intel Xeon vt-d query

  - by deploymonkey

  Does Xeon westmere ep (xeon 56xx series) have vt-d (=iommy / direct io) or does intel TXT (Intel® Trusted Execution Technology) include vt-d? I'm at a loss. I've been researching current processors for an important project for some time now. I need to know, if the xeon 5600s (Westmere EP) include vt-d (iommu/directed io/pci passing) because the system will run virtualized guests. This enables direct hardware access eg. pci passthrough, in xen for example. It seems that the 5600s TXT should incorporate vt-d and that xeon 5600s should include vt-d as they are ramped up 5500s, but there is no conclusive answer anywhere. Intel's processor comparison only states that 5500s have vt-d and no TXT and 5600s have no vt-d but TXT. I'd be really grateful if anybody could clear this up and possibly even provide a citation. Thanks a lot.

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• Mac Book Pro SSD

  - by LiamB

  I have a Mac Book Pro (I7 and 8 Gig Ram). I'm a developer - do a fair amount of .net via VMware but lots of Ruby and NodeJs on the Mac. I'm looking to extract some more performance and i think a SSD might be a good option. So I have 2 questions, Can I straight up replace the drive thats in there with a SSD or will this cause me problems? I have files on there as well as apps. What are my options in terms of available hardware.

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• Ubuntu 10.04 install - frozen at splash, no errors

  - by Andrew Bolster

  Has anyone else come across this? After about as much of a fresh install as i can muster without buying new drives, and after walking through the amd64 alternate install with ease, and after a little 'pre-splash' screen where the orange dots under the (very sexy) new ubuntu logo blink away, I'm left with a vista of purple hues and logo plonked in the middle, with the dots not going anywhere. I was at this same position last night at 3 in the morning, left it lying overnight, and nothing had changed, so I'm pretty sure its frozen, the virtual terminals are not accessible, ie, c+a+F1 etc does nothing, but when i go in and inspect /var/log/* in the recovery console by booting off the installation cd, no errors, no complaints, no problems. I'm at my wits end and am just about ready to try anything. If this was on SO I'd be bountying, but if anyone can help you'll just have to cope with my thanks! Additional Details on my blog and my first attempt at asking for help Update: I can reasonably say it is not a hardware fault, as a full install of 9.10 with dual screen nvidia xinemara indicate that nothing is wonky

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• WEP authentication suddenly failing in Ubuntu

  - by kellishaver

  I'm running Ubuntu 9.10 and after a recent reboot, I'm now unable to authenticate to wireless networks using WEP encryption. I can connect fine to open networks (no idea about WPA). When trying to connect via WEP, I'm continually prompted for the network key, which I know I have entered correctly (and should have been/is saved in my keyring anyway). Everything had been working fine until the reboot. No updates had been installed or configuration changes made. Hardware-wise, everything looks fine (http://pastebin.org/113777), and the fact that connecting to an open network works just fine leads me to think this is a software issue. I just don't know where to begin fixing it. Any insights would be greatly appreciated.

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• What is the current state of development for the FLAC codec?

  - by TwentyMiles

  I have a pretty large collection of FLAC files created from my CD collection. I love the FLAC format and the sound quality that you can get from it. Lately, however, I've been trying to write a few tools to manipulate the files and I've been noticing what seems to be a stagnation of the community around the codec. Some of the links on the official FLAC page point to thing that are no longer relevant (7digital, for example, appears to no longer sell FLAC encoded songs). It's pretty hard to find hardware players that support FLAC any more (most noticeably it's not present on lower end players when it used to be, and playback is absent on Android). Programming language tools (Java and .NET libraries) are at best old, and at worst unfinished. What's the current state of FLAC development? Has it been replaced by another codec?

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• How to install old versions of gcc on Fedora without a VM?

  - by mikeh

  Hi, I need gcc 4.3 running alongside the shipped 4.4 on an FC13 machine. I can't do the VM solution discussed at http://serverfault.com/questions/88445/how-to-install-old-versions-of-gcc-on-fedora-12 since I need hardware access (CUDA computations on the graphics card). There's no compat-gcc-43 package (only compat-gcc-34). So I've built gcc by hand and am now trying to decide how to "install" it. Could anyone confirm that this was my only option, and/or suggest a best practice for how to manage the side-by-side gcc versions?

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• Quiet Sound while recording using the "Stereo Mix" option on Windows XP.

  - by DragoonX

  I'm trying to record some of my work, and the video capture program I'm using works fine. It's HyperCam2, and since it's not really professional, I don't care about that little thing in the corner. Anyways, If I check the record sound option and put it on the highest quality, and I want it to record the sounds playing from my computer, I have it record the "Stereo Mix" setting. However, after a quick test, I saw that even though my computer was at max volume, the recorded sound was very quiet, almost inaudible. Thinking it was just HyperCam, I downloaded Audacity, and only met similar results. While I'm not entirely savvy with hardware, I BELIEVE this to be my soundcard: SoundMAX Integrated Digital HD Audio

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• Disable Bing search entirely from IE when using sysprep

  - by takesides

  I'm creating a Windows Server 2012 R2 image for our product (an all-in-one appliance installed on server hardware) and I am having incredible trouble with getting Bing removed from Internet Explorer. Our clients do not want Bing at all, not as a default search, not as a "search from address bar" feature, not in any sense. I've managed to configure everything else that I want in IE using WAIK to generate an unattend XML file but this has me completely stuck. Ideally I want Bing removed from IE altogether but I would make do with it just being completely disabled. I can find no options in either WAIK or Group Policy to configure this as I need it. Any ideas gratefully received.

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• Restrict access to ESXi

  - by kdl

  What is the best option to restrict access to ESXi machine so that it could be managed using VSphere client from only certain hosts? I know there is no built-in firewall and everyone recommends placing an ESXi machine behind a firewall, but when this is not an option... Is there any other option like using hosts.allow/deny or anything else? Or I better use ESX instead of ESXi? Edit: In the given circumstances, I am not able to add any additional hardware or use things like managed switches.

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• MySQL cluster: Error after 1 data node is shutdown and started again

  - by nitins

  MySQL cluster: Error after 1 data node is shutdown and started again. We have configured MySQL cluster(version 7.1) with 2 sql/data nodes. We are using table space instead of in-memory clustering. The setup was working fine. So to test the setup I shutdown one data node, updated a table and and again stated the stopped node. Its giving this error and not starting. Any ideas ? Forced node shutdown completed. Occured during startphase 5. Caused by error 2306: 'Pointer too large(Internal error, programming error or missing error message, please report a bug). Temporary error, restart node'.

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• Remote Desktop with resource sharing

  - by Malfist

  I recently removed ubuntu from my laptop and installed Windows 7 because Microsoft's DreamSpark program gave me Visual Studio Pro for free and I want to do some C# programming with it. The problem is that my laptop's screen is small, it's resources are extremely limited, and it doesn't have a full sized keyboard. However, I do have a desktop that is my primary system, and it's got a quadcore and tons of RAM in it, and dual monitors. My question is this, is there a way I can use a program from my laptop, on my desktop, and share my desktops CPU and RAM with the laptop? Everything is connected through a 100 MB/s switch. One caveat, my desktop is running ubuntu.

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• Non-Apple RAID card for Mac PRO (TOWER)

  - by Arthor

  I have the following: MAC PRO (Model Number: A1186) (PCIe - SLOTS) At present I am using the software RAID however I wish to move to the hardware raid because of the following: Performance (4 x 300gb SATA II in RAID 5) Redundancy (Raid 5, 1 drive can fail and system will be online) I do not wish to use the Apple RAID card (very expensive), I would like to use an aftermarket one which is cheaper. Questions: Does anyone have a WORKING aftermarket RAID card working in their MAC PRO (TOWER)? -(Have done some research, ROCKETRAID, need confirmation) If so to the above, does it work from boot? Thanks

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• What are the "must " security tools for small organizations ?

  - by Berkay

  One of my friend has started a company, it's a small-scale company that has a 40 workers.There is two guys also responsible for the security and IT related issues.He is managing the LAN, Webpage of the company, e-mail configuration, printer hardware modification, application deployment etc. In this point, to provide the security measures including access controls, authentication, web server security etc. Which tools do you use for securing, monitoring and controlling the system ? Are you paying for these tools or are they open source? This question is due to the security administrators requests to my friend.He offers to get some tools for the company and my friend hesitates to pay that much on them (what he mentioned me.)

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• How to avoid Memory "Hard Fault/sec"

  - by Flavio Oliveira

  i've a problem on my windows 2008 server x64, and i cannot understand how can i solve it. i'm looking to Resource Monitor and see about 100 to 200 hard faults/sec. and generally the machine is slow. As i've readed a bit it is caused by a "memory Page" that is no longer available on physical memory and causes a io operations (disk) and it is a problem. The current hardware is a intel core2duo E8400 (3.0GHz) with 6GB RAM on a Windows Server Web 64-bit. Actually the machine have about 2GB Ram used what having 4Gb available to use, Why is the machine requires that high level of Disk operations? what can i do to increase the performance? Im experiencing a memory issues? what should be my starting point?

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• Can not run ifconfig like commands via browser

  - by savruk

  Hi, Problem is I cannot run "ifconfig" or similar commands via browser. Environment: Programming language : python Server : lighttpd(CGI) , running on busybox. Well machine is really small and so I am really restricted. Tried techniques: chown every script to root. But there is no differences. Why? Because lighttpd runs under another user, I mean not under root. As it is not root, when I try to run script from browser it always calls the python file with its uid. So it makes it impossible to run "ifconfig eth0 192.168.2.123" like commands via web browser. I get "ifconfig: SIOCSIFADDR: Permission denied" error. What can I do? I do not have any sudoers file, so cannot modify sudo command. Well, I don't even have "sudo" command :) Thanks for your help

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• RAID P410i and P812 performance issues

  - by Alexey

  I'm having much trouble with I/O performance of HP DL360 server with two RAID controllers - P410i and P812, Windows Server 2008, 36 GiB RAM and 16 x Intel Xeon x5550. The server runs a bunch of tasks producing heavy sequential I/O, and after about 20-30 minutes of intensive work it looks like the tasks are stuck, not using CPU and with enough free memory (so this cannot be a bottleneck). The same tasks were running quite well on the older server (Windows Server 2003, 4 x Intel Xeon, 12 GiB RAM). RAID cache is present, write-cache battery is installed. Cache is configured as 25% readahead/75% writeback. The swap file resides on the logical disk served by P410i and other logical disks are on P812. Can someone tell me what can be the matter of this? Is this a hardware problem or misconfiguration?

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• VPN using Zywall

  - by Rune FS

  I've played around with a certificate based VPN (normally I don't do hardware) we've manged to setup the connection and the tunnel between the routers is working correctly. We now need the last step. There's no connection to the computers on the other end. What could we have forgotten? (we're testing with two standard configured Win7 machines) EDIT: Just to clarify the tunnel is working I can ping the router on the other end. I can't access the computers on the other side of that router and vice versa. (It's also possible to access the remotemangement console of the remote router on the LAN IP)

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