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• How reliable are Compact Flash drives

  - by bakytn

  For example, USB drives have read/write limits. and they are considered as unreliable and not durable for daily use over many years. My question is, however, about Compact Flash drives. AFAIK they are built almost in the same way as USB flash drives. I was going to use one Compact Flash drive for daily usage and install a lightweight operating system to it (Linux). What kind of limitations do they have? Read/write operations? Just a time? something else? Thank you!

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• Windows 7 Slowness following Virtual PC and Visual Studio Install

  - by Elliot Hughes

  I'm running Windows 7 32bit on a 3.2ghz Pentium D with 2gb RAM and a 1TB SATA hard drive. My system was running as fast as it ever has until I installed Visual Studio and Virtual PC a few days ago. Ever since - regardless of whether either application has been running the system has been running incredibly slowly. For example flash video plays jumpily, 3D games that used to run fine are now unplayable and even the smallest amount of multitasking makes the system unusable. I'm confident there is no virus or other such things present following scans in safemode and I'm fairly confident I've made no other changes to my system. Any ideas - I've run out of things to try!

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• Windows Server Configuration with Exchange, SQL Express and IIS

  - by Reafidy

  In our small office we are currently running a standalone tower server with WS 2008 R2, SQL Express and IIS. This server is going to be decommissioned and scrapped as its old and very noisy. We are going to purchase a new server with WS 2012 Standard and a heap of ram. It will still be a standalone server so it will be a domain controller, have SQL Express and IIS installed. We intend to install the hyper-v role and host a second virtual server to distribute the load. We are a small company and have only 15 staff members so its not a huge load on the server. Can a single server handle this type of installation, we don't want to purchase two servers. If so how should it be configured with regard to which software packages should be virtualized(if any). Redundancy is not a huge issue for us.

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• Leightweight Linux distro to install on my old PC

  - by Juri

  Hi, I have an old PC at home which is mainly used by my Mom or my brother just to browse the web and maybe open some PDFs / docs. Till now I had Win2000 installed, but it performs very poorly. So I thought about installing Linux on it. Could someone give me some suggestions for a leightweight Linux distribution which works well?? Is standard Ubuntu too heavy?? PC details CPU: Athlon AMD ~1211 MHz RAM: 1GB Grafics Card: NVidia GeForce FX 5200 (not so relevant,but still) Thx for your suggestions.

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• Is Ubuntu Netbook Remix actually lighter than Ubuntu Desktop?

  - by D Connors

  I'm running ubuntu on my work notebook. While it's not a netbook, it is a relatively weak machine. So, even though I'm not a big fan of the ubuntu netbook interface, I would be willing to use it if it's lighter (on RAM and CPU) than the desktop version. I know there are some very light linux distros available out there, but I'd like to stick with ubuntu both for it's community and for the support I have available here at my workplace. So, is Ubuntu Netbook Remix lighter on system resources than Ubuntu Desktop?

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• What causes winsock 10055 errors? How should I troubleshoot?

  - by Tom Kerr

  I'm investigating some issues with winsock 10055 errors on a chain of custom applications (some of which we control, some not) and was hoping to get some advice on techniques to troubleshoot the problem. No buffer space available. An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full. From research, non-paged pool and ports seem to be the only resources which can cause this error. Is there another resource which might cause 10055 errors? Currently, we have perfmon counters setup on the applications and non-paged pool usage looks low in most circumstances. Open TCP connections looks low and I am unaware of another way to monitor ports. Since it only happens in production, we are unable to use more invasive counters. Is there some other tool or procedure you would recommend to diagnose which application is causing the issue?

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• mysql settings - using the available resources

  - by Christian Payne

  I've got a lot of processing work I need to run on a mysql server. I've installed mysql 5.1.45-community on a Win 2007 64bit. Its running on a xenon, 3ghz 6 processors with 8 gig ram. It doesn't seem to matter what queries I run (or the number I run at the same time), when I look in task manager, I'll see one processor is out at 100%. The other 5 are idol. Memory is static at 1.54 gig. When I installed mysql, I used the wizard and selected the default "server" (not workstation) option. I feel like I should be getting more bang for my buck. Is there something else I should be monitoring or something I should change to use the other system resources???

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• Cannot log on to a remote server using rdp from windows 7 machine when I am remotley connected to th

  - by Gary

  Bear withe me, here is my set up. I use my 27" iMac 3.06GHz Core 2 Duo 4GB Ram to connect to my work desktop running Windows 7. From there I can administer other remote servers. Here is the problem. Using the Remote Desktop Client on my Mac I can connect to my work machine no problem. But when I then use the work machine to open a remote desktop session with another Windows server (usually SBS 2003 but applies to all) I get the log in prompt, I enter the user name password ensure i'm connecting to the domain, but it wont log me in. The error message is the same, as though I had typed the wrong password (i know this is not the case). Does anyone have a solution? Thanks in advance. Gary

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• Cannot find my hard disk while installing linux-“No root file system defined” error

  - by Syam Kumar S

  I am trying install Linux on my computer (tried Ubuntu 10.4 and Linux Mint 9). I started the installation wizard and on the hard disk selection page the hard disk is not displayed. I have a 500GB disk with 5 partitions and windows 7 ultimate in one partition. If I click the forward button, it shows an error- "No root file system defined". I have tried to install by booting from CD and pendrive but both shows the same error. When I load Linux as live CD it doesn't show the hard disk. My hard disk works fine in windows 7. System config: intel i3 2100, 500GB hdd, 2GB ram

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• How can I exceed the 60% Memory Limit of IIS7

  - by evilknot

  Pardon if this is more stackoverflow vs. serverfault. It seems to be on the border. We have an application that caches a large amount of product data for an e-commerce application using ASP.NET caching. This is a dictionary object with 65K elements, and our calculations put the object's size at ~10GB. Problem: The amount of memory the object consumes seems to be far in excess of our 10GB calculation. BIGGEST CONCERN: We can't seem to use over 60% of the 32GB in the server. What we've tried so far: In machine.config/system.web (sf doesn't allow the tags, pardon the formatting): processModel autoConfig="true" memoryLimit="80" In web.config/system.web/caching/cache (sf doesn't allow the tags, pardon the formatting): privateBytesLimit = "20000000000" (and 0, the default of course) percentagePhysicalMemoryUsedLimit = "90" Environment: Windows 2008R2 x64 32GB RAM IIS7 Nothing seems to allow us to exceed the 60% value. See attached screenshot of taskman.

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• Apache Prefork Configuration

  - by user1618606

  I'm newbie on VPS configuration. So, I've installed apache, php and mysql and now I need to know how to configure Prefork to optimize Apache. The system configuration is: CPU Cores 2 x 2 Ghz @ 4 Ghz RAM Memory 2304 MB DDR3 Burst Memory 3 GB DDR3 Disk Space 30 GB SSD Bandwidth 3 TB SwitchPort 1 Gbps Actually, after linux, mysql, apache and php, there are 250 MB memory in use. Well, I don't have idea to calculate. I saw in some websistes, some vars like: KeepAlive On KeepAliveTimeout 1 MaxKeepAliveRequests 100 StartServers 15 MinSpareServers 15 MaxSpareServers 15 MaxClients 20 MaxRequestsPerChild 0 or StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 How I could to do: Prefork or worker? Where and how the vars are placed? In httpd.conf?

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• Apache Prefork Configuration

  - by user1618606

  I'm newbie on VPS configuration. So, I've installed apache, php and mysql and now I need to know how to configure Prefork to optimize Apache. The system configuration is: CPU Cores 2 x 2 Ghz @ 4 Ghz RAM Memory 2304 MB DDR3 Burst Memory 3 GB DDR3 Disk Space 30 GB SSD Bandwidth 3 TB SwitchPort 1 Gbps Actually, after linux, mysql, apache and php, there are 250 MB memory in use. Well, I don't have idea to calculate. I saw in some websistes, some vars like: KeepAlive On KeepAliveTimeout 1 MaxKeepAliveRequests 100 StartServers 15 MinSpareServers 15 MaxSpareServers 15 MaxClients 20 MaxRequestsPerChild 0 or StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 How I could to do: Prefork or worker? Where and how the vars are placed? In httpd.conf?

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• Find which php scripts cause high CPU with php-cgi

  - by Oli

  Background: I maintain a server for a client who has half a dozen Wordpress sites on. They all have the W3 Total Cache plugin installed and eAcellerator is installed (might be APC). All the PHP sites run through a single batch of fastcgi php-cgi processes (it's actually php-fpm but I'm not sure if that makes a difference). Problem: php-cgi's CPU usage is quite high. Not terminally high but high enough to raise an eyebrow. The client wants to add more sites in the future and I want to avoid becoming CPU limited if I can help it. Question: Is there any way I can find the scripts or even just requests that are causing the high CPU. I realise I might not be able to do anything with the results but it would give me a chance.

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• FireFox/NoScript: why has the NoScript icon disappeared?

  - by Peter Mortensen

  Why has the appearence of NoScript changed? Using Noscript in FireFox (Microsoft Windows): Until now there has been an icon (the S icon) in the lower right of the screen. But now there is an button instead with the text "Options". Left clicking this button seems to bring up the menu as right clicking the old icon. Can I restore the previous state? Is there an auto-update function in NoScript and if so could it have caused the change? If it exists can the auto-update function be disabled? Platform: FireFox 3.0.6, NoScript 1.9.0.6, Windows XP 64 bit, 8 GB RAM.

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• Intermittent freeze of Windows 7 x64 on laptop

  - by georged

  I have Lenovo W500, 8GB RAM, 250GB Crucial SSD running Windows 7 x64 using boot-to-vhd. Lately I started to experience some random freezes for 5-30 seconds. And when I say "freeze" I mean it; it's like a time machine - no input taken, nothing is written anywhere, no log, no disk activity. And then suddenly machine would wake up and continue as if nothing happened. I do suspect that it's one of the drivers but I don't see any updates in the log lately except for .NET 4 framework and Adobe Reader. Out of new or updated software I can only recall Skype and IE9 but freezes started to occur definitely before IE install. Regular software includes but not limited to: Office 2010, VMWare Workstation, IE9, Chrome, Skype, Seesmic/TweeterDeck, Live Writer. How should I approach the "hunting season" to find our the culprit? Any tools or packages that could help me to identify the component, program, driver that causes the freeze? Cheers

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• How to tell if PAE is hurting me?

  - by James

  I have a couple of servers with 20-30 GB RAM that are running (a variant of) RHEL4. They are currently running the SMP i386 kernel, not x64, not even the hugemem kernel. This means LowMem is confined to < 1G, and thus dentry_cache and ext3_inode_cache to 100M or so each. How can I tell if this is a problem? Here's a typical vmstat report while it's compiling some Java: $ vmstat 10 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 1 1 0 19493816 394740 922420 0 0 1058 2292 1491 1020 6 3 80 12 2 1 0 19519480 395244 850156 0 0 1179 1412 1329 1195 9 4 75 12 1 1 0 19557368 392616 828344 0 0 1783 1680 1498 1756 14 5 72 9 I don't like the way bi is nonzero when there is so much memory free. I imagine slabtop could point more directly to the problem but I don't really understand how to interpret its output.

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• Where does apache store initialization state for mod_proxy_balancer

  - by khoxsey

  I run apache2 on Ubuntu as a caching load-balancing reverse proxy in front of a group of application servers. I have noticed that the balancer maintains some state for some of the attributes visible in /balancer-manager such as whether an IP is enabled/disabled, load factor, etc. My site has periods of high (and low) usage, and recently as I added a new server to the working group I noticed that the load balancer picked up the new server but had it set to Disabled. I'm curious where that data is stored, and/or how it is initialized.

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• KVM CLI install for CentOS 6.3 defaults to Minimal Install

  - by i.h4d35

  So I now I've installed KVM (and its associated tools and packages- libvirt, VMM etc.). On the GUI (i.e using the VMM), installation works as its supposed to. However, when I try to create a VM using the command line interface, the OS (I am working with CentOS 6.3) defaults to a Minimal Install instead of giving me options to choose from at the time of installation. I am trying to install using the following command: virt-install \ --connect qemu:///system \ --virt-type kvm --name testVM2 \ --ram 512 --disk path=/var/lib/libvirt/images/testVM2.img,size=8 --vnc \ --cdrom /media/db18de8e-0853-49fb-80de-5c794d58a46f/CentOS-6.3- x86_64-bin-DVD1.iso \ --network network=default Specifying the OS-type or the OS-variant parameters doesn't make a difference. Is there something that I am missing out on or some other parameter that I must specify? Thanks in advance.

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• Bandwidth Control on our Internet Connection

  - by AlamedaDad

  Hi all, I have Covad dual/bonded T1 service in our office coming through a Cisco 1841 and then through a Sonicwall 3060Pro/Enhanced SW firewall. The problem I'm looking for some input on is how to limit the amount of bandwidth any single user/PC can user for downloading a file from the Internet. It's become an issue that when one person happens to download let's say an ~300MB file, normal internet access for the other employees slows to a crawl. I've seen through MRTG that in fact usage of the circuit jumps to the full 3mb for the duration of the download and then drops. Is it possible to control this? I'm not familiar with QOS or the like so I'm not sure. Any help on this would be appreciated. Thanks...Michael

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• Pause/play AJAX on particular tabs in firefox

  - by bguiz

  Hi, I want to know if there is some method to disable AJAX on particular tabs within Firefox and re-enable them later. My concern is that I have metered bandwidth, and I need to conserve my usage. But I also like to leave several Gmail tabs open in the background. It would be great if I could just hit a "Pause AJAX" button, to stop the contents of that tab from sending or receiving anything, and then later on hit a "Play" button when I want it to start doing its thing again. Any suggestions?

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• grep pattern interpretted differently in 2 different systems with same grep version

  - by Lance Woodson

  We manufacture a linux appliance for data centers, and all are running fedora installed from the same kickstart process. There are different hardware versions, some with IDE hard drives and some SCSI, so the filesystems may be at /dev/sdaN or /dev/hdaN. We have a web interface into these appliances that show disk usage, which is generated using "df | grep /dev/*da". This generally works for both hardware versions, giving an output like follows: /dev/sda2 5952284 3507816 2137228 63% / /dev/sda5 67670876 9128796 55049152 15% /data /dev/sda1 101086 11976 83891 13% /boot However, for one machine, we get the following result from that command: Binary file /dev/sda matches It seems that its grepping files matching /dev/*da for an unknown pattern for some reason, only on this box that is seemingly identical in grep version, packages, kernel, and hardware. I switched the grep pattern to be "/dev/.da" and everything works as expected on this troublesome box, but I hate not knowing why this is happening. Anyone have any ideas? Or perhaps some other tests to try?

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• Configure TV Capture card to not use external audio jack for TV audio output

  - by Adam D.

  I had this working with MythTV on Ubuntu 9.1. Then a power surge killed the motherboard. After replacing the motherboard, ram and cpu, the card does not produce any audio except through the output jack on the back of the card. I do not want to use a cable to go from the back of the card to the audio in on the built in sound card of the new mother board. FYI, the old motherboard did not have an on-board sound card. There was a separate audio card installed. There's some configuration that has to be done to have it work the same way again. I just have no idea where to start. This is regarding wintv hauppauge mythtv linux ubuntu 9.10 audio

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• Advantages of multiple SQL Server files with a single RAID array

  - by Dr Giles M

  Originally posted on stack overflow, but re-worded. Imagine the scenario : For a database I have RAID arrays R: (MDF) T: (transaction log) and of course shared transparent usage of X: (tempDB). I've been reading around and get the impression that if you are using RAID then adding multiple SQL Server NDF files sitting on R: within a filegroup won't yeild any more improvements. Of course, adding another raid array S: and putting an NDF file on that would. However, being a reasonably savvy software person, it's not unthinkable to hypothesise that, even for smaller MDFs sitting on one RAID array that SQL Server will perform growth and locking operations (for writes) on the MDF, so adding NDFs to the filegroup even if they sat on R: would distribute the locking operations and growth operations allowing more throughput? Or does the time taken to reconstruct the data from distributed filegroups outweigh the benefits of reduced locking? I'm also aware that the behaviour and benefits may be different for tables/indeces/log. Is there a good site that distinguishes the benefits of multiple files when RAID is already in place?

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• Wake network adapter from deep sleep mode

  - by BeatMe

  I recently buyed a new Mainboard (Asrock ALiveXFire) and got some trouble with the network adapter. After switching my Windows 7 x64 in energey saving mode and returning from it, my network adapter couldn't be found. After some googling I found out, that apparently my network adapter has been put in a deep sleep mode and didn't reactivate. Their solution was to switch the PC off, take out the RAM and the CMOS battery for some time. After that, the adapter should be powered on again, but that didn't happen for me. I waited several hours before turning my PC on again, but that didn't help. Formatting and reinstalling didn't help either. The network adapter is not found in the hardware manager and reinstalling the drivers didn't help. I have the newest BIOS installed on the mainboard. I literally don't know what to try next. I'm thinking of returning my board, but I would like to avoid the hassle.

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• Hyper-Threading and Dual-Core, What's the Difference?

  - by Josh Stodola

  In a conversation with the network administator, I mentioned that my machine was a dual-core. He told me it was not. I brought up the task manager, went to the perfomance tab, and showed him that there are two separate CPU usage graphs. I have a quad-core machine at home and it has four graphs. He told there were two graphs on this particular machine because of hyper-threading. I used to have a hyper-thread pentium 4 processor back in the day, but I never fully understood what it meant. So what is the difference between hyper threading and dual-core? And how do you tell which one you have?

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