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On Sat, Apr 3, 2010 at 4:13 PM, Mark Knecht <markknecht@×××××.com> wrote: |
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> On Fri, Apr 2, 2010 at 10:18 AM, Mark Knecht <markknecht@×××××.com> wrote: |
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> <SNIP> |
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>> |
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>> I also purchased two Enterprise Edition drives - the 500GB size. They |
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>> are also spec'ed at 300K |
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>> |
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>> http://www.wdc.com/en/products/products.asp?DriveID=489 |
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>> |
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>> My intention was to use them in a RAID0 and then back them up daily to |
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>> RAID1 for more safety. However I'm starting to think this TLER feature |
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>> may well be part of this problem. I don't want to start using them |
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>> however until I understand this 30/minute issue. No reason to wear |
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>> everything out! |
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>> |
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>> <SNIP> |
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> |
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> Duncan, |
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> Just a quick follow-up. I tested the WD Green drives for the last |
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> 36 hours in Spinrite and found no problems. I think the drives are OK. |
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> |
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> I then took the two 500GB Raid Enterprise drives above and made a |
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> new RAID1 on which I did a quick Gentoo install. This uses the same |
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> SATA controller, same cables and same drivers as I was using earlier |
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> with the Green drives. While doing the install I saw no problems or |
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> delays on them. Now I've got a new RAID1 install but cannot get it to |
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> boot as grub doesn't seem to automatically assemble the RAID1 device. |
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> I'm moderately confident that once I figure out how to get grub to |
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> understand / is on RAID1 then I may be in good shape. |
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> |
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> Thanks for your help, |
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> |
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> Cheers, |
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> Mark |
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> |
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|
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OK, after a solid day of testing it really looks like the cause is the |
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WD10EARS drive. With RAID1 on these new enterprise drives I no longer |
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see 100% waits and I have no error messages anywhere that I can find |
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them. Additionally the early SMART data looks like there's not the |
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same LOAD_CYCLE_COUNT incrementing problem either. |
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|
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I sort of feel like this should be reported to someone - LKML or maybe |
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the SATA driver folks. It's completely reproducible, and I'd be happy |
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to help some developer debug it if they wanted to, but I'm not sure |
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how to go about something that specific. |
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|
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Anyway, it appears my problems are solved. I'm using RAID for / and |
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your ideas about multiple /boot partitions. I haven't tested the other |
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boots yet but I'm sure it will likely work. |
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|
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Thanks, |
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Mark |
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