Comments on: RAID 5 drive failure http://echeng.com/journal/2006/05/25/raid-5-drive-failure/ Eric Cheng's Journal Sat, 11 Feb 2012 13:44:00 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: remove system fix virus http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-3212505 remove system fix virus Tue, 20 Dec 2011 07:53:00 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-3212505 <p>Sorry to hear that! That's really annoy to have such a failure.</p> Sorry to hear that! That’s really annoy to have such a failure.

]]> By: alexking.org: Blog > Around the web http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-48730 alexking.org: Blog > Around the web Sun, 28 May 2006 14:12:50 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-48730 <p>[...] [ECHENG.COM] - RAID 5 drive failure - never let Eric anywhere near a HD you care about. [...]</p> [...] [ECHENG.COM] – RAID 5 drive failure – never let Eric anywhere near a HD you care about. [...]

]]> By: Adam Steffes http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-47388 Adam Steffes Fri, 26 May 2006 20:43:12 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-47388 <p>Can I have a UPS, Curtis? :D</p> Can I have a UPS, Curtis? :D

]]> By: Adam Steffes http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-47387 Adam Steffes Fri, 26 May 2006 20:41:58 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-47387 <p>Eric, the same controller exists for SATA and SAS disks. I suppose you would have to invest in a SAS chassis that accepts SATA disks, though. Then buy a couple of these bad boys:</p> <p>http://www.seagate.com/cda/products/discsales/marketing/detail/0,1081,743,00.html</p> <p>Check out the P400 if you're remotely interested in the RAID6 stuff: http://h18004.www1.hp.com/products/servers/proliantstorage/arraycontrollers/index.html</p> Eric, the same controller exists for SATA and SAS disks. I suppose you would have to invest in a SAS chassis that accepts SATA disks, though. Then buy a couple of these bad boys:

http://www.seagate.com/cda/pro.....43,00.html

Check out the P400 if you’re remotely interested in the RAID6 stuff: http://h18004.www1.hp.com/prod.....index.html

]]> By: echeng http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-47300 echeng Fri, 26 May 2006 17:25:01 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-47300 <p>Thanks, Curtis. You're the master of old gear. :) I have a big UPS under there and have been wanting to get another, since I have two devices that can shut themselves off via UPS control signal. Problem is that one of them requires USB, so a SU700 won't work.</p> <p>I wonder if the serial port in my main server is working... ;)</p> Thanks, Curtis. You’re the master of old gear. :) I have a big UPS under there and have been wanting to get another, since I have two devices that can shut themselves off via UPS control signal. Problem is that one of them requires USB, so a SU700 won’t work.

I wonder if the serial port in my main server is working… ;)

]]> By: Curtis Leo http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-47168 Curtis Leo Fri, 26 May 2006 12:36:49 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-47168 <p>Sorry to hear about bad drives. Since you're never home, you might try a raid 5 + 2 online spares.</p> <p>Another method that I've used in building arrays, 10 Drive array, 2 x Raid 5 + 1 (4 drives + 1 online spare). You'll have a "faster rebuild" time, thus lowering your unprotected state. Each in a protected group.</p> <p>When you do buy another set of drives, buy 2 extra shelf spares. At work, we run through drives like crazy and found a bunch of drives with different servo codes, firmware codes, sector size differences. The sector size difference is nasty during a rebuild process.</p> <p>Also unstead of having all the drives in the same case as your motherboard, go external enclosure. I think it's time for a 42U rackmount frame! When drives are all spinning in a array, there is a vibration induced by drives. As you add more drives to the mix, each one is vibrating at a different frequency. Basically all the drives can vibrate each other to death.</p> <p>I just qualified the Hitachi Deskstar T7K500 500gb SATA 3.0gb/s drives in our arrays. :) 500gb x 10! :)</p> <p>I'm guessing that you already have UPSs but I have a bunch of APC SU700 UPS that I don't need anymore. Think I have 6 more of them. Want them? They just need new batteries.</p> Sorry to hear about bad drives. Since you’re never home, you might try a raid 5 + 2 online spares.

Another method that I’ve used in building arrays, 10 Drive array, 2 x Raid 5 + 1 (4 drives + 1 online spare). You’ll have a “faster rebuild” time, thus lowering your unprotected state. Each in a protected group.

When you do buy another set of drives, buy 2 extra shelf spares. At work, we run through drives like crazy and found a bunch of drives with different servo codes, firmware codes, sector size differences. The sector size difference is nasty during a rebuild process.

Also unstead of having all the drives in the same case as your motherboard, go external enclosure. I think it’s time for a 42U rackmount frame! When drives are all spinning in a array, there is a vibration induced by drives. As you add more drives to the mix, each one is vibrating at a different frequency. Basically all the drives can vibrate each other to death.

I just qualified the Hitachi Deskstar T7K500 500gb SATA 3.0gb/s drives in our arrays. :) 500gb x 10! :)

I’m guessing that you already have UPSs but I have a bunch of APC SU700 UPS that I don’t need anymore. Think I have 6 more of them. Want them? They just need new batteries.

]]> By: echeng http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-46893 echeng Thu, 25 May 2006 22:47:10 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-46893 <p>Yeah, I understand your point, Victor. My system already does auto-rebuilds, but I need a swap drive, which I am not doing at the moment because I need all the space I have!</p> <p>During the next big upgrade (after I pass 2TB of data), I'll be sure to configure a 7-drive RAID 5 + 1 drive swap.</p> Yeah, I understand your point, Victor. My system already does auto-rebuilds, but I need a swap drive, which I am not doing at the moment because I need all the space I have!

During the next big upgrade (after I pass 2TB of data), I’ll be sure to configure a 7-drive RAID 5 + 1 drive swap.

]]> By: Victor A. http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-46876 Victor A. Thu, 25 May 2006 21:31:36 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-46876 <p>Eric,</p> <p>Re: your comment to me. Sadly nothing can prevent drive failure (not even brushing your teeth 3 times a day, saying your prayers and eating your broccoli). What an enterprise-clase storage device would do would reduce the impact that drive failure has (RAID 50, hot spare, battery backup, etc..)</p> <p>With you being gone on multi-day/week trips, a system with 2+ hot spares that auto-rebuild the raid might mean you could just stop home to do laundry, swap dead drives, have a meal with Vienna and head back to the AirPort. :-)</p> <p>After seeing your setup, it almost seems that if there was a next (reinforcement) step up to be taken, a Xserve RAID (or similar) might be it. Plus, dang it, Apple's RAID works for windows - it is a rare time I get to recommend hardware from that little fruit company that menas not buying a Mac.</p> <p>hehehe.</p> Eric,

Re: your comment to me. Sadly nothing can prevent drive failure (not even brushing your teeth 3 times a day, saying your prayers and eating your broccoli). What an enterprise-clase storage device would do would reduce the impact that drive failure has (RAID 50, hot spare, battery backup, etc..)

With you being gone on multi-day/week trips, a system with 2+ hot spares that auto-rebuild the raid might mean you could just stop home to do laundry, swap dead drives, have a meal with Vienna and head back to the AirPort. :-)

After seeing your setup, it almost seems that if there was a next (reinforcement) step up to be taken, a Xserve RAID (or similar) might be it. Plus, dang it, Apple’s RAID works for windows – it is a rare time I get to recommend hardware from that little fruit company that menas not buying a Mac.

hehehe.

]]> By: echeng http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-46868 echeng Thu, 25 May 2006 20:46:51 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-46868 <p>Adam - how am I going to get 2TB of online storage via SCSI? :) I think I'm going to have to stick with SATA. :) Performance isn't important for me, since there are usually at most 2-3 machines accessing the data at once. It's all over gigabit, so I'm capped at 26-28MB/s of transfer, anyway.</p> Adam – how am I going to get 2TB of online storage via SCSI? :) I think I’m going to have to stick with SATA. :) Performance isn’t important for me, since there are usually at most 2-3 machines accessing the data at once. It’s all over gigabit, so I’m capped at 26-28MB/s of transfer, anyway.

]]> By: Adam Steffes http://echeng.com/journal/2006/05/25/raid-5-drive-failure/comment-page-1/#comment-46866 Adam Steffes Thu, 25 May 2006 20:37:13 +0000 http://echeng.com/journal/2006/05/25/raid-5-drive-failure/#comment-46866 <p>You may want to investigate a RAID controller which supports dual-parity ADG RAID-6, such as the HP Smart Array P600. :)</p> <p>http://h18004.www1.hp.com/products/servers/proliantstorage/arraycontrollers/smartarrayp600/index.html</p> You may want to investigate a RAID controller which supports dual-parity ADG RAID-6, such as the HP Smart Array P600. :)

http://h18004.www1.hp.com/prod.....index.html

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