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• What is the deal with hard drive technology moving to 4K sectors, vs. 512 bytes? Are 4K sector disk

  - by Chris W. Rea

  I've noticed that some Western Digital hard drives are now sporting 4K sectors, that is, the sectors are larger: 4096 bytes vs. the actual de facto standard of 512 bytes. So: What's the big deal with 4K sectors? Is it marketing hype, or a real advantage? Why should somebody building a new PC care, or not, about 4K sectors? Why is this transition taking place now? Why didn't it happen sooner? Are there things to look out for when buying a 4K sector hard drive? e.g. incompatibility? Anything else we should know about 4K sectors?

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• AVG 9 (Internet Security Business Edition) and IIS 6.0

  - by Dave Holland

  Are any of you using AVG 9 Internet Security Business Edition along with IIS 6.0 and if so have you experienced problems? We just went from 8.5 to 9.0... Luckily I tried on only one of the servers in the web farm first to run for a week to make sure it played well with my servers. A few hours after the install all web apps were giving a "connection refused" error. Neither iisrest or restarting world wide web publishing services resolves the issue, only rebooting the machine brings the webs back up. They are all ASP.Net sites by the way (v2.5). What's interesting is if I take the machine out of the load balancer, the machine runs fine and the webs are just fine for days... as soon as i put it back in the pool it's only a few hours before its sad. The only thing I can think of right now is that the Resident Shield may be causing an issue, any thoughts?

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• Single/Mulitple LUN for vmware vm hosting

  - by Yucong Sun

  I'm building a iscsi storage system for hosting about ~500 Vmware vm running concurrently. And I have a disk array with 15 disks, I only need moderate write performance but preferably not SPOFed. so, that leaves me with RAID1 / RAID10 , I have couple choices: 1) 3x LUN 4disk RAID10 + 3 hot-swap 2) 1x LUN 14disk RAID10 + 1 hot-swap 3) 7x LUN 2disk RAID1 + 1 host-swap Which way is better? Is there a real problem running 500 vms on single LUN? and would it be better to resort to 7 LUns so each VM is better isolated with each other?

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• Windows Vista/7: Managing multiple audio playback devices

  - by BrianLy

  I've got speakers (audio in) and headphones (USB headset with it's own soundcard) connected to my desktop computer. Under Windows 7, I can right-click the Audio Mixer and select Playback Devices and toggle between my these devices. Is there an easier way, perhaps a keyboard shortcut, that would make it easier to toggle? I'm working in an shared space were sometimes I want headphones to avoid annoying other people, but at other times speakers are OK. I want to be able to toggle quickly. In an ideal world, the solution to my question would work in Vista too.

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• Synology DS210j & online backup: what do people recommend?

  - by Dean

  I've just purchased a Synology DS210j for my home network and would like to backup this NAS online. I noticed that DiskStation Manager v2.3 provides various options including Amazon S3 and rsync: Does anybody have some real usage against cost statistics for Amazon's S3 service? How is sensitive data protected on Amazon S3? Are there any rsync online backup options? If so, what do people recommend? UPDATE: I am still unable to find any decent answers to the above questions, can anybody help me out?

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• ifilter not working with MOSS 2007, cant crawl .pdf

  - by SORRYPROFESSEROFYEARNING

  Installed ifilter and followed the guides: http://msmvps.com/blogs/sundar_narasiman/archive/2008/02/06/configuring-moss-2007-to-search-pdf-documents-install-and-configure-pdf-ifilters.aspx and the accompanying link to the MS hotfix.. I have initiated multiple crawls that don't show any .pdf documents, let alone the contents of the .pdfs (I did constantly upload test documents with real content). In the 'file types' menu of the shared servies, it didn't show the pdf icon as I think it was meant to, it also lists 'pdf' as filetype 'AcroExch.Document', is this correct? Any ideas anyone?

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• Searching for a specific option in a man page

  - by mitch_feaster

  I often find myself man'ing a command just to learn about one specific option. Most of the time I can search to the option just fine, unless it's something like ffmpeg or gcc where I have to step through about 40 matches until I get to the actual description of the option... Sometimes I can get lucky and search for the word "options" to get close and then refine it from there, but it would be nice if I could reliably jump straight to the option in question. It would be cool if there was a tool that could parse out the options and build a database on which you could do searches, but after looking at the groff markup for a few pages I've determined it would only be a best-guess effort due to the lack of meta-information in groff markup... In my ideal world woman mode in emacs would support searching for specific options... :) Any tips for jumping straight to a specific option in a man page?

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• Changing Windows Media Center StartRecording Task Scheduler options

  - by T Reddy

  Hi, I'm experiencing some occasional crashes waking from sleep and I believe it may be related to the Corsair SSD F40GB2 as my boot disk...or the new Ceton tuner I recently installed... I dunno what the real problem is as I can't reproduce the problem manually. I read somewhere that I should not allow the hard disks to sleep...so I'm trying that in the meantime... At any rate, I don't really care that the computer crashes so long as WMC will start recording the task as soon as possible...the task is scheduled to wake the computer 5 minutes before the recording starts. I noticed that there is a StartRecording param in the Media Center folder in Task Scheduler. There is an option (currently unchecked) that will retry a failed task. I would like to know if there is a way to enable that checkbox. My hope is that if my PC crashes when waking up for this task, that after it reboots the task will trigger again and start recording. Thanks!

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• what is acceptable datastore latency on VMware ESXi host?

  - by BeowulfNode42

  Looking at our performance figures on our existing VMware ESXi 4.1 host at the Datastore/Real-time performance data Write Latency Avg 14 ms Max 41 ms Read Latency Avg 4.5 ms Max 12 ms People don't seem to be complaining too much about it being slow with those numbers. But how much higher could they get before people found it to be a problem? We are reviewing our head office systems due to running low on storage space, and are tossing up between buying a 2nd VM host with DAS or buying some sort of NAS for SMB file shares in the near term and maybe running VMs from it in the longer term. Currently we have just under 40 staff at head office with 9 smaller branches spread across the country. Head office is runnning in an MS RDS session based environment with linux ERP and mail systems. In total 22 VMs on a single host with DAS made from a RAID 10 made of 6x 15k SAS disks.

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• UDP multicast streaming of media content over WIFI

  - by sajad

  I am using vlc to stream media content over wireless network in scenario like this (from content streamer to stream receiver client): The bandwidth of wireless network is 54 Mb/s and UDP stream's required bandwidth is only 4 Mb/s; however there is trouble in receiving media stream and quality of playing specifically in multicast mode; means I can play the stream but it has jitter and does not play smoothly. In uni-cast I can stream up to 5 media streams correctly, but in multicast mode there is problem with streaming just one media! However when I stream from client some multicast streams; the wifi access-point can receive data correctly and I can see the video in "udp streamer" side correctly even when number of multicast streams increases to 9; But as you see I want to stream from streaming server and receive media in client size. Is this a typical problem of streaming real-time contents over wireless networks? Is it necessary to change configurations of my WIFI switch or it is just a software trouble? thank you

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• Apache </Location> Errors

  - by Eddie

  Hi there! I am having real trouble with this installation - Basically this is the erro that I am getting: apache2: Syntax error on line 234 of /etc/apache2/apache2.conf: Syntax error on line 10 of /etc/apache2/conf.d/amberdms-bs.conf: Expected </Location\xc2\xa0/billing_system> but saw </Location> and this is the code that is being used in that modules file: #  # Amberdms Billing System is an open source accounting, service billing and time keeping web application.  #  Alias /billing_system /usr/share/amberdms/billing_system  <Location /billing_system>  Order deny,allow  Allow from all  AllowOverride all    Please help me! I need this software to be installed, but this error has stumped me.

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• VMWare ESX Updates - Which to Apply?

  - by Aaron Alton

  Wondering what more experienced ESX admins typically do... I just brought our ESX hosts up to 3.5 Update 5 (Yes, I know we're behind still). I then applied the "Critical Host Updates" baseline in VMWare update manager, and found that we're still short on 14 "critical updates". My question is, do most people go ahead and apply any update flagged as critical, or do they evaluate each update one-by-one to determine whether or not the issue that has been addressed is likely to affect them. In the SQL Server world (my alma mater, so to speak), we regularly apply service packs, and sometimes cumulative updates, but we only apply hotfixes when the issue that they are targeted towards affects us. Does the same logic hold fast in VMWare land?

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• Wireless and Wired Network Access at same time?

  - by grasper

  At work, I use a laptop. It is a Dell Latitude D630 with Windows XP. I work in a lab environment where I need to use the Ethernet Port as a Static IP to interact with a local network (which cannot talk to the outside world). What I would like to do is use the Wireless as the internet connection so i can check email, etc at the same time I am using the ethernet network... It seems like this is not possible. Is there a piece of software or a way to configure it to allow me to do this?

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• Effects of HTTP/TCP connection handshakes and server performance

  - by Blankman

  When running apache bench on the same server as the website like: ab -n 1000 -c 10 localhost:8080/ I am most probably not getting accurate results when compared to users hitting the server from various locations. I'm trying to understand how or rather why this will effect real world performance since a user in china will have different latency issues when compared to someone in the same state/country. Say my web server has a maximum thread limit of 100. Can someone explain in detail how end user latency can/will effect server performance. I'm assuming here that each request will be computed equally at say 10ms. What I'm not understand is how external factors can effect overal server performance, specifically internet connections (location, or even device like mobile) and http/tcp handshakes etc.

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• Save output and exit code of command to files on windows

  - by poncha

  I want to run a command and save its output and its exit code, in different files. Here's what i am doing: cmd.exe /C command 1> %TEMP%\output.log 2> %TEMP%\error.log && echo %ERRORLEVEL% > %TEMP%\status || echo %ERRORLEVEL% > %TEMP%\status If i don't do output redirection (into %TEMP%\output.log and/or %TEMP%\error.log), then exit code is saved just fine. However, when i run the line as shown above more than once (just get back to previous line in command prompt and rerun it), i get 0 in %TEMP%\status regardless of the real exit code. What am i missing? Or maybe there's a better way of doing this?

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• BIND authoritative name server: SERVFAIL?

  - by Luca Tettamanti

  I have a BIND 9.6 instance that acts as a caching NS for the whole building and is also authoritative for an internal zone ("example" below): zone "example" { type master; file "example"; update-policy { grant dhcp-update subdomain example. A TXT; }; }; Due to a rogue switch we lost connectivity with the rest of the world, and the NS started answering SERVFAIL; what surprised me was that the server was also unable to respond to queries for the example domain. What is the reason of this behavior? Shouldn't the NS be able to answer since it has authoritative data? edit: The rest of the configuration is the standard one shipped with Debian: hints for the root servers and the zones for localhost and broadcast.

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• Can I run iOS apps on my Mac?

  - by Ken

  I've seen a number of neat iPhone apps recently that I'd like to use. In particular, there are a number of neat musical apps (metronome, tuner, etc.) that seem highly rated, and have no real Mac equivalent. I don't have a recent iPod/iPhone/iPad (I don't need portability or a phone and it seems silly to pay hundreds of dollars to run $15 worth of apps), but I do have an Intel (C2D) Mac. Can the iPhone dev simulator, or any other emulator, download and run iPhone App Store apps?

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• Is there a Windows equivalent of Unix 'CPU steal time'?

  - by Steffen Opel

  In order to assess performance monitoring accuracy on virtualization platforms, the CPU steal time has become an increasingly relevant metric - see EC2 monitoring: the case of stolen CPU for an instructive summary in the context of Amazon EC2 and IBM's paper on CPU time accounting for a more in-depth technical explanation (including illustrations) of the concept: Steal time is the percentage of time a virtual CPU waits for a real CPU while the hypervisor is servicing another virtual processor. Accordingly, it is exposed in most related Unix/Linux monitoring tools nowadays - see e.g. columns %steal or st in sar or top: st -- Steal Time The amount of CPU 'stolen' from this virtual machine by the hypervisor for other tasks (such as running another virtual machine). I've been unable to figure out how to capture the same metric on Windows though, is this possible already? (Ideally for the Windows 2008 Server R2 AMIs on EC2 and via a respective Windows Performance Counters of course.)

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• Extending my desktop across two monitors with Nvidia Geforce 8800 GT

  - by Vega Sera

  When I played my old computer before I got this one, I was able to use the horizontal span. (Nvidia Geforce 6200 I believe) However, with this new computer, using vista and the 8800, the horizontal span option is gone, and all I have is dual veiw, which doesn't suit my needs. I play World of Warcraft on both my monitors, using CT_Viewport to keep my character and my veiwport on a single screen, while the majority of my addons lie on my other monitor. The problem with dual view is that the WoW will only stay on my primary monitor. Horizontal span would fix this easily, but there is no option for it. Any help regarding this?

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• IIS7 returns 403.1 (execute access denied) for image file

  - by Kristoffer

  I have a web app running in IIS7 on Windows Server 2008. There is a virtual directory pointing to a shared folder "/Content/Data" on another machine (running Windows Server 2003), as well as a real directory "/Content/Images" on the local machine (web app sub folder). Accessing images in "/Content/Images" is no problem, but when an image (e.g. a JPEG file) in the "/Content/Data" is accessed by a browser, IIS returns this error: HTTP Error 403.1 - Forbidden: Execute access is denied. However, the web app can read and write to / from it. I assume IIS and ASP.NET are running under different user accounts? Does anyone have an idea on what I have to do to make it work? I have set the permissions on the shared folder to Everyone Full Control, with no luck.

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• mod_fcgid process doesn't respawn

  - by aaronsw

  I have a Python script running on my server as a FastCGI using Apache2 and mod_fcgid. I let it spawn up to five processes. But I soon get messages like these in the Apache logs: [Wed Sep 02 23:16:34 2009] [warn] (103)Software caused connection abort: mod_fcgid: ap_pass_brigade failed in handle_request function [Wed Sep 02 23:16:35 2009] [warn] (103)Software caused connection abort: mod_fcgid: ap_pass_brigade failed in handle_request function and then Apache doesn't seem to recognize that all its processes are dead (I have a max of 5 backends) and refuses to spawn new ones: [Wed Sep 02 23:26:16 2009] [notice] mod_fcgid: /var/www/hacks.og.theinfo.org/picker.fcgi total process count 5 >= 5, skip the spawn request [Wed Sep 02 23:26:17 2009] [notice] mod_fcgid: /var/www/hacks.og.theinfo.org/picker.fcgi total process count 5 >= 5, skip the spawn request at which point it refuses to respond to requests from the outside world. This doesn't seem to happen with my other FastCGIs, which all use the same Apache config: <IfModule mod_fcgid.c> AddHandler fcgid-script .fcgi IPCConnectTimeout 20 MaxProcessCount 5 DefaultMaxClassProcessCount 2 DefaultMinClassProcessCount 1 </IfModule> Any idea what causes it?

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• how to bypass internal DNS?

  - by fabjoa

  This is about Ubuntu but should be pretty much the same on all Linux flavors. Let's say I add an entry to my /etc/hosts such as 127.0.1.12 facebook.com and an Apache virtual host such as <VirtualHost 127.0.1.12> ServerName facebook.com DocumentRoot /var/www </VirtualHost> when i open my browser and send a GET request to facebook.com, firefox will browse my /var/www folder. Question: How could I fetch (ie, using wget in bash) the real facebook.com domain - without erasing the entry in /etc/hosts nor my Apache VirtualHost -- IOW how could I bypass internal DNS?

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• Clean up infected computer from viruses

  - by ripper234

  I have a computer which had AVG Free installed from day one. After several months of operation, it starts detecting viruses and trojans all the time. Besides running a full scan, what should I do to clean the computer? Should I install another anti-virus or anti-malware tool (can it help?), or once viruses infect a system the only real solution is a clean format? (Lately I've heard of viruses that burn themselves in the BIOS, so a clean format might not always work ... how common is this technique? Should I burn a fresh BIOS as well?)

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• Sharepoint Document Library not receiving emails

  - by ria

  I have created a sharepoint document library which is email enabled. However when i send email to the designated email address from anywhere, i dont receive the email & attachment in the list. I have done some R&D and i hv found that in order to receive email from anywhere i have to expose my DNS of the sharepoint site to the outside world. Now i dont know whether it applies to the email address designated to me in the Active directory profile as well (my company domain email address). How to test that this email reception is working in the document library? I have tried sending an email from the sharepoint site and it works fine so the SMTP settings are correctly done.

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• OSX: Undeletable files

  - by geoffjentry

  So via what I suspect is a cron'd rsync gone awry, I noticed that I have ~25000 variants of .DS_Store in a directory that's on an external disk, they're named "..DS_Store.FOO" where FOO varies. The problem is that I can seem to delete them, even using the various tricks I've seen over the years for removing files with oddball names. No problem, I said - I moved all of the real files into another directory and then just tried to do an 'rm -r' on the original directory ... no luck, it fails to delete those files and says directory not empty. Tried it again with 'rm -rf' and still no luck. I have no idea how to get rid of this thing, does anyone have any idea?

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