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  • Make Google Chrome's address bar prefer page titles to domain names when offering completions?

    - by Ryan Thompson
    I've recently switched from Firefox to Chrome, and the thing I miss most from Firefox is the "Awesome Bar" that suggests completions for what I type primarily based on page titles, and then secondarily based on domain names. Chrome offers both matching URLs and titles, just like like Firefox, but Chrome seems to always prefer a matching domain name over a matching page title or a match to another part of the URL (besides the domain), no matter how many times I pass over the former for the latter. In fact, Chrome also prefers to suggest a search rather than matching anything other than a domain name. So is there any hidden preference I can change to tell Chrome that I care more about page titles than domain names? Example: I want to go to Google Reader, so I press Control+L and begin typing "reader". The URL for google reader is http://www.google.com/reader/view/#overview-page, so the domain name is www.google.com, which does not contain the word "reader". So the first option that Chrome suggests is either another site that has "reader" as part of the domain, or a search for "reader" with the default search engine. No matter how many times I scroll down and select Google Reader, Chrome never "learns" that that's what I want.

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  • Why are FMS logs filled with 'play' event status code 408 for a failed webcast?

    - by Stu Thompson
    Recently we had a live webcast event go horribly wrong. I'm doing the technical post-mortem, with limited information. We know that the hardware encoder (a Digital Rapid Touch Stream Web HDI) was unable to send upstream at a sustained reliable high rate. What we don't know is if the encoder's connection was problematic (Zürich), or that of the streaming server (in Frankfurt). Unfortunately, I've got three different vendors all blaming each other (the CDN who runs the server, the on-site ISP and the on-site encoding team.) In the FMS log files I see a couple of interesting things: Zillions of Status Code 408 on play event entries for clients. Adobe's documentation stats that this "Stream stopped because client disconnected". ("Zillions" would be a ratio of 10 events for every individual IP address.) Several unpublish / (re)publish events per hour for the encoder I'd like to know if all those 408s could tell me with authority that the FMS server was starved for bandwidth, or that the encoding signal was starved (and hence the server was disconnecting clients.) Any clues?

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  • Why is a FLAC encoded from a decoded MP3 bigger than the MP3?

    - by Ryan Thompson
    To be more precise than in the title, suppose I have a MP3 file that is 320 kbps. If I decompress it, then logically, all the data except for roughly 320 kilobits out of each second of audio should be redundant data, able to be compressed away. So, when I encode the decompressed file to FLAC, or any other lossless codec, why is it so much larger? On a related note, is it theoretically possible to losslessly recover the source mp3 audio from a decompressed wav? (I know the mp3 itself is lossy. I'm asking if it's possible to re-encode without any further loss.) EDIT: Let me clarify the related question, and the rationale behind it. Suppose I have a wav that was decompressed from an MP3 file (and assume I don't have the mp3 itself for some reason). If I don't want to lose any more quality, I can re-encode it with FLAC or any other lossless encoder and get a larger file just to maintain the same quality. Or, I can re-encode it to mp3 again and get the same size as the original but lose more data. Obviously, neither of these cases is ideal. I can either have the original size or the original quality, but not both (I mean the quality of the original mp3, not the original lossless source). My question is: Can we get both? Is it theoretically possible to recover the lossy compressed data from the lossy decompressed data, without losing even more? If it is possible, I could imagine a lossless compression algorithm that compresses the audio with FLAC. Then it also scans the audio for any signs of previous lossy compression, and if detected, recompresses it losslessly to the original lossy file. Then it keeps whichever file is smaller.

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  • Mac Mini drive problems but SMART verified: bad hard drive or controller?

    - by Zac Thompson
    I have a 3-year-old Intel Mac Mini at home. About a month ago, it stopped booting from the hard drive (internal, SATA, 80GB). I tried booting from the Install Disc to repair the filesystem but Disk Utility was unable to do so ("invalid node structure"). I was also unable to use the hard drive in the Terminal from the Install Disc nor from an Ubuntu boot CD ("DRDY err"). I could see the contents of some directories, but others would give an error and I would get failures when trying to copy files. At this point I was sure the filesystem was hosed and I'd want to reformat at least. DiskWarrior was able to let me retrieve the data files I was interested in, which are now copied to an external hard drive, but it reported a high number of problems ("speed reduced by disk malfunction" count was over 2000) when in the process of trying to rebuild the directory for the drive. It also would not let me use the rebuilt directory to replace the one on the drive; it claimed the disk errors prevented recovery in this way. Under normal circumstances I would now assume that the drive itself was going bad: DiskWarrior's "disk malfunction" error above is supposed to imply hardware problems. My initial plan was to buy a replacement for the internal 2.5" drive. However: Disk Utility, command-line tools and DiskWarrior had reported all along that the SMART status of the drive was okay/Verified. So I'm now worried that the drive hardware is actually fine, and that the problems were due to a disk controller that has gone "bad" somehow. If this is the case, I'll probably just replace the whole computer. Any advice on how I can tell what is to blame? I don't have a lot of extra hardware sitting around, so I don't have the option of simply dropping the drive in another machine or popping another hard drive inside the Mini.

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  • How can I run Gnome or KDE locally in Cygwin?

    - by John Peter Thompson Garcés
    Apparently it is possible to do this using cygwin ports, as can be seen in screenshots. I followed this how-to to get apt-cygports set up, and I used it to install gnome-session. This how-to supposedly gives the commands needed to run Gnome or KDE, but whenever I try to run Gnome, a blank X-window pops up and then quickly disappears. Here is the terminal output: $ startx /usr/bin/dbus-launch gnome-session xauth: file /home/jpthomps/.serverauth.4168 does not exist Welcome to the XWin X Server Vendor: The Cygwin/X Project Release: 1.10.3.0 OS: Windows 7 Service Pack 1 [Windows NT 6.1 build 7601] (WoW64) Package: version 1.10.3-12 built 2011-08-22 XWin was started with the following command line: /usr/bin/X :0 -auth /home/jpthomps/.serverauth.4168 (II) xorg.conf is not supported (II) See http://x.cygwin.com/docs/faq/cygwin-x-faq.html for more information LoadPreferences: /home/jpthomps/.XWinrc not found LoadPreferences: Loading /etc/X11/system.XWinrc LoadPreferences: Done parsing the configuration file... winDetectSupportedEngines - DirectDraw installed, allowing ShadowDD winDetectSupportedEngines - Windows NT, allowing PrimaryDD winDetectSupportedEngines - DirectDraw4 installed, allowing ShadowDDNL winDetectSupportedEngines - Returning, supported engines 0000001f winSetEngine - Using Shadow DirectDraw NonLocking winScreenInit - Using Windows display depth of 32 bits per pixel winFinishScreenInitFB - Masks: 00ff0000 0000ff00 000000ff Screen 0 added at virtual desktop coordinate (0,0). MIT-SHM extension disabled due to lack of kernel support XFree86-Bigfont extension local-client optimization disabled due to lack of shared memory support in the kernel (II) AIGLX: Loaded and initialized /usr/lib/dri/swrast_dri.so (II) GLX: Initialized DRISWRAST GL provider for screen 0 winPointerWarpCursor - Discarding first warp: 637 478 (--) 5 mouse buttons found (--) Setting autorepeat to delay=500, rate=31 (--) Windows keyboard layout: "00000409" (00000409) "US", type 4 (--) Found matching XKB configuration "English (USA)" (--) Model = "pc105" Layout = "us" Variant = "none" Options = "none" Rules = "base" Model = "pc105" Layout = "us" Variant = "none" Options = "none" winBlockHandler - pthread_mutex_unlock() winProcEstablishConnection - winInitClipboard returned. winClipboardProc - DISPLAY=:0.0 winClipboardProc - XOpenDisplay () returned and successfully opened the display. xinit: XFree86_VT property unexpectedly has 0 items instead of 1 xinit: connection to X server lost waiting for X server to shut down winClipboardProc - winClipboardFlushWindowsMessageQueue trapped WM_QUIT message, exiting main loop. winClipboardProc - XDestroyWindow succeeded. winClipboardProc - Clipboard disabled - Exit from server winDeinitMultiWindowWM - Noting shutdown in progress

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  • Cannot access drive in Windows 7 after scandisk lockup, but can in safe mode....

    - by Matt Thompson
    I ran scandisk on my external USB drive due to the inability to delete a few files. Windows asked me if I wanted to unmount the drive before the scan, warning me that it would be unusable until the scan was finished, and I said yes. During the scan, my machine locked up, and I was forced to reboot the machine. When it came up, I was unable to access the drive, getting an error that "L:is not accessible, access is denied". Comupter Management sees the drive, and has the proper amount of disk space filled. I booted into safe mode, and can access the drive with no problems, and I noticed that in explorer, all the folders have locks on them. I booted back into windows, but still could not access the drive, getting the same error as above. Hovever, if I right click on the drive, select properties, and go to Customize, in the folder pictures ares, I select Choose File, and a window open up, that shows the root of the directory, with all the folder able to be accessed, but again, the icon is the folder icon with a lock on it. I can even copy files from the drive to another. So, the files are not gone, windows can obviously access the drive no matter what it thinks, so there has to be a problem with the flag windows put on the drive when it ran the original scan that failed. I was able to run a scan both in safe mode with no problems, and in windows. In windows, I received the cannot access error the first time I run scan disk on it, but if I try again, it works fine. Any ideas on how to clear the flag that windows set, so I can access the drive normally again?

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  • IIS6 Permissions

    - by Gordon Carpenter-Thompson
    We have a set of IIS6 Jakarta/ASP.NET applications (implemented as virtual directories) on a machine without a domain. The directories all exist under the default website. We need to setup the permissions so that certain users can access only specific applications yet others users can access several of the applications. The way it's been setup previously has been to explicitly deny access to the users for every application except the ones that they are allowed to see. The problem is that the list of applications changes fairly often (for demos etc) and it's been known for the developers to forget to deny the old users access to the new applications which leads to security problems. This is all quite unmaintainable. Does anybody have any advice on this? Surely I can't be the only person to find this all a bit of a mess? Thanks

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  • Is an Intel Atom D525 suitable to run MythTV

    - by Martin Thompson
    I have an oldish netbook with an Atom N450 (1.6GHz, 512KB cache) - I've been using it to experiment with MythTV, but it seems really slow, even just to work through the menus! Seconds, sometimes 10 or 20s, to load a new menu. Admittedly from a remote backend, but my older Core1 based laptop seems to be fine with the same setup. I was hoping to use one of the so-called "nettop" devices which currently seem to be D525-based (1.8GHz, 1MB cache) - is double the cache really going to make that much difference? Or has the internal architecture of the Atom moved on leaps and bounds in between? Given that I design non-Intel embedded computers for a living I was hoping to get lots of hardcore architecture detail from the Intel website, so I could see for myself, but I can't find it! So: will a D525 be fast enough to run a MythTV backend/frontend combined box?

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  • Hibernating and booting into another OS: will my filesystems be corrupted?

    - by Ryan Thompson
    Suppose I have Windows and Linux installed on the same computer. If I hibernate Windows, can I boot into Linux without corrupting the Windows filesystem when I resume Windows? What about the other way around? What if I hibernate one, boot into the other, and mount the hibernated filesystem read/write? Read-only? If this is unsafe, is there any way to detect the hibernated state of the other OS and prevent mounting its filesystem? Basically, how far can I push this before it breaks, and how dangerous is it near the edge? I think I know the answers to some of the above questions, but for other ones, I have no idea, and for obvious reasons I have not tested this on my own computer. If someone has tested these, please enlighten the rest of us. I'm not necessarily looking for a specific answer to every question; I'll accept any response that answers a reasonable portion. EDIT: Let me clarify that when I say "hibernate," I mean the process of writing the contents of RAM to the hard disk and completely powering down the computer. In this state, powering the computer back on brings you through the BIOS and bootloader again, and you could theoretically select another operating system on a multi-boot system. Anyway, on with the original question: RESULTS Ok, after everyone's assurances that this would work, I tested it for myself. I set up Ubuntu to remount all ntfs filesystems and external drives read-only before hibernating. There was no need for a similar Windows setup because Windows does not read Linux filesystems. Then, I tried alternately hibernating one operating system and resuming the other, back and forth a few times. I even tried mounting the Windows filesystem from Ubuntu read-write, and creating a few files. Windows didn't complain when I resumed. So, in conclusion, you can more or less freely hibernate in a dual-boot Windows/Linux scenario. Note that I did not test a dual Linux/Linux co-hibernation situation. If you have two or more Linux installs and you hibernate one of them, you might be able to corrupt the filesystem by mounting it from another.

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  • How to get back to an active minibuffer prompt in emacs without the mouse

    - by Ryan Thompson
    In emacs, sometimes I will be in the middle of finding a file or switching buffers or doing something in the minibuffer, and I will click somewhere else for some reason. When I go back, the only way to make the minibuffer prompt active again is to click inside the minibuffer, which is annoying because it is a thin area. Is there any way to switch back to an active minibuffer prompt without using the mouse?

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  • Can I make ssh tell me which control file it would use for multiplexing?

    - by Ryan Thompson
    I am using the following options in my ~/.ssh/config in order to enable connection multiplexing: ControlMaster auto ControlPath ~/.ssh/control/master-%r@%h:%p However, this has the annoying problem that the first shell to connect to a particular server must be the last to disconnect, because it is the master connection that all the other connections are using. So if you log out of the master, it appears to just hang. To solve this, I would like to wrap ssh with a script that checks if the control master file exists, and if not, starts a master ssh process in the background. Then it would start a slave ssh session. In order to accomplish this, my script would have to determine the path to the control file that ssh would use. This would entail parsing the ssh command line options and config files and implementing the logic for determining the ControlPath. Is there any way to just ask ssh what path it would use, so I can check it?

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  • How can I set environment variables for a graphical login on linux?

    - by Ryan Thompson
    I'm looking for a way to set arbitrary environment variables for my graphical login on linux. I am not talking about starting a terminal and exporting environment variables within the terminal, because those variables only exist within that one terminal. I want to know how to set an environment variable that will apply to all programs started in my graphical session. In other words, what's the Xorg equivalent of ~/.bash_login?

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  • Is it possible to store playlists in music file metadata?

    - by Ryan Thompson
    I have been trying to think of a way to store my playlists completely independently from any one music player, and I think that one way to do this would be to use each song's tags to store the list of playlists in which that song belongs. For example, if song1.mp3 and song2.flac both belong in the "Cool Songs" playlist, then I would add to each of them a tag called "Playlist" with a value of "Cool Songs". To access the "Cool Songs" playlist in my music player, I simply search for songs where the "Playlist" tag has a value of "Cool Songs". Obviously, I would need a music player that allows me to manipulate arbitrary tags on any music format, including multiple instances of the same tag (so that songs can be in multiple playlists). Instead of creating playlists, I create "saved searches" or whatever the music player calls them, that search for the appropriate playlist tag. Is this scheme possible, and how many music player programs would support such a scheme?

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  • Is there a way for Windows 7 to show remaining disk space in the status bar?

    - by Matt Thompson
    This is really driving me nuts. I do a lot of moving media files to and from USB drives, and I am constantly looking to the status bar to see how much remaining space I have on a drive. It's quick, and doesn't involve any clicking. At least, that's what I used to do using Windows XP. Is there a way to get the status bar in Windows 7 to behave in the same way? I saw in a Wikipedia article that some features have been removed from Windows 7, including these two that seem to be affecting me the most: The size of any selected item and free disk space are not shown on the status bar. When no items are selected in a folder, neither the details pane nor the status bar show the total size of files in the folder. Are there any plug-ins or registry tweaks that can be made to return this functionality? If not what is the quickest way to get the remaining space on a drive without having to click on something and leaving the directory you are working in?

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  • How can I prevent firefox from using bitmap fonts at certain zoom levels?

    - by Ryan Thompson
    In firefox 3.6 on Ubuntu 9.10, certain sites seem to use bitmap fonts for any fixed-width fonts, but only at specific zoom levels. This site and other stackexchange sites are among the affected sites, and of course the default zoom level is affected. At unaffected zoom levels, I get the expected smooth curvy fonts. How can I make firefox use the nice curvy smooth fonts at all zoom levels?

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  • How can a single disk in a hardware SATA RAID-10 array bring the entire array to a screeching halt?

    - by Stu Thompson
    Prelude: I'm a code-monkey that's increasingly taken on SysAdmin duties for my small company. My code is our product, and increasingly we provide the same app as SaaS. About 18 months ago I moved our servers from a premium hosting centric vendor to a barebones rack pusher in a tier IV data center. (Literally across the street.) This ment doing much more ourselves--things like networking, storage and monitoring. As part the big move, to replace our leased direct attached storage from the hosting company, I built a 9TB two-node NAS based on SuperMicro chassises, 3ware RAID cards, Ubuntu 10.04, two dozen SATA disks, DRBD and . It's all lovingly documented in three blog posts: Building up & testing a new 9TB SATA RAID10 NFSv4 NAS: Part I, Part II and Part III. We also setup a Cacit monitoring system. Recently we've been adding more and more data points, like SMART values. I could not have done all this without the awesome boffins at ServerFault. It's been a fun and educational experience. My boss is happy (we saved bucket loads of $$$), our customers are happy (storage costs are down), I'm happy (fun, fun, fun). Until yesterday. Outage & Recovery: Some time after lunch we started getting reports of sluggish performance from our application, an on-demand streaming media CMS. About the same time our Cacti monitoring system sent a blizzard of emails. One of the more telling alerts was a graph of iostat await. Performance became so degraded that Pingdom began sending "server down" notifications. The overall load was moderate, there was not traffic spike. After logging onto the application servers, NFS clients of the NAS, I confirmed that just about everything was experiencing highly intermittent and insanely long IO wait times. And once I hopped onto the primary NAS node itself, the same delays were evident when trying to navigate the problem array's file system. Time to fail over, that went well. Within 20 minuts everything was confirmed to be back up and running perfectly. Post-Mortem: After any and all system failures I perform a post-mortem to determine the cause of the failure. First thing I did was ssh back into the box and start reviewing logs. It was offline, completely. Time for a trip to the data center. Hardware reset, backup an and running. In /var/syslog I found this scary looking entry: Nov 15 06:49:44 umbilo smartd[2827]: Device: /dev/twa0 [3ware_disk_00], 6 Currently unreadable (pending) sectors Nov 15 06:49:44 umbilo smartd[2827]: Device: /dev/twa0 [3ware_disk_07], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 171 to 170 Nov 15 06:49:45 umbilo smartd[2827]: Device: /dev/twa0 [3ware_disk_10], 16 Currently unreadable (pending) sectors Nov 15 06:49:45 umbilo smartd[2827]: Device: /dev/twa0 [3ware_disk_10], 4 Offline uncorrectable sectors Nov 15 06:49:45 umbilo smartd[2827]: Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error Nov 15 06:49:45 umbilo smartd[2827]: # 1 Short offline Completed: read failure 90% 6576 3421766910 Nov 15 06:49:45 umbilo smartd[2827]: # 2 Short offline Completed: read failure 90% 6087 3421766910 Nov 15 06:49:45 umbilo smartd[2827]: # 3 Short offline Completed: read failure 10% 5901 656821791 Nov 15 06:49:45 umbilo smartd[2827]: # 4 Short offline Completed: read failure 90% 5818 651637856 Nov 15 06:49:45 umbilo smartd[2827]: So I went to check the Cacti graphs for the disks in the array. Here we see that, yes, disk 7 is slipping away just like syslog says it is. But we also see that disk 8's SMART Read Erros are fluctuating. There are no messages about disk 8 in syslog. More interesting is that the fluctuating values for disk 8 directly correlate to the high IO wait times! My interpretation is that: Disk 8 is experiencing an odd hardware fault that results in intermittent long operation times. Somehow this fault condition on the disk is locking up the entire array Maybe there is a more accurate or correct description, but the net result has been that the one disk is impacting the performance of the whole array. The Question(s) How can a single disk in a hardware SATA RAID-10 array bring the entire array to a screeching halt? Am I being naïve to think that the RAID card should have dealt with this? How can I prevent a single misbehaving disk from impacting the entire array? Am I missing something?

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  • Looking at desktop virtualization, but some users need 3D support. Is HP Remote Graphics a viable solution?

    - by Ryan Thompson
    My company is looking at desktop virtualization, and are planning to move all of the desktop compute resources into the server room or data center, and provide users with thin clients for access. In most cases, a simple VNC or Remote Desktop solution is adequate, but some users are running visualizations that require 3D capability--something that VNC and Remote Desktop cannot support. Rather than making an exception and providing desktop machines for these users, complicating out rollout and future operations, we are considering adding servers with GPUs, and using HP's Remote Graphics to provide access from the thin client. The demo version appears to work acceptably, but there is a bit of a learning curve, it's not clear how well it would work for multiple simultaneous sessions, and it's not clear if it would be a good solution to apply to non-3D sessions. If possible, as with the hardware, we want to deploy a single software solution instead of a mishmash. If anyone has had experience managing a large installation of HP Remote Graphics, I would appreciate any feedback you can provide.

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  • Logitech Performance MX Mouse Jumps on OS X Lion (10.7.4)

    - by Adam Thompson
    I have a Logitech MX Revolution wireless mouse that I am trying to use with OS X Lion. Everything is working except for one problem... there is a small, but quite noticeable, jump when the mouse cursor is moved. The problem is mostly prevalent when dragging and dropping files or trying to highlight items. It makes performing any task with the mouse accurately next to impossible. I did quite a bit of looking and found that all kinds of people have had mouse issues with OS X. I've tried all of the following with absolutely no success: Using the official drivers from Logitech (these performed worse than the default mouse drivers in OS X) Using SteerMouse as a third party mouse driver. This worked ever so slightly better than the default driver, but still suffered quite frequently from the skipping problem Cleaning the sensor on the mouse and ensuring it's not the result of the surface that it's being used on. Tested the mouse on a Windows machine. The mouse worked absolutely flawlessly on the other machine. Changed the channel that my wireless router operates on by the off chance my problems were the result of interference. This also had no effect. I can't think of anything else that could possibly interfere with the mouse. I'm am out of ideas on what to try, so I would really appreciate if anyone has any suggestions. I should also mention that an old wired mouse I had laying around worked just fine when I plugged it in. This really isn't the best solution, however, as I really prefer the MX Revolution.

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  • How do I make a privileged port non-privileged in Redhat 5?

    - by Jason Thompson
    So I have a RedHat 5 box that I'm wanting to run an application that I wrote that implements SLP. SLP uses port 427 for answering service queries. My understanding is that ports below 1024 are "privileged" and thus cannot be bound to by anyone that's not root. I cannot run this application as root as it is launched via tomcat. One creative solution I really like was simply writing an iptables rule to route the privileged port to a non-privileged. In my proof of concept tests, this works wonderfully. Unfortunately, it would be greatly (and understandably) desired by the powers if my application did not require screwing around with iptables upon installation. So I heard a rumor and cannot find anything to verify this that there was some sort of command or parameter that could be set to make any port I want be non-privileged. Is this true? If so, how is this done? Thanks!

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  • What is the value/cost of enabling "spread spectrum clocking" on my hard drives?

    - by Stu Thompson
    I'm building up a biggish NAS box (10x WD RE4 2TB SATA RAID10) and ran into some problems. During the course of my research, debugging, investigations, etc, I discovered a jumper on the physical drives labeled "spread spectrum clocking". After some googling about this on teh internets, it seems to be a feature that some suggest (without reference or explanation) enabling in 'a storage configuration' that makes the drive less sussesptable to EMI. But why? I've got three core questions: Why is this feature not enabled by default? What are the actual benefits? Are there any costs?

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