It seems recent WD drives that aren't "Raid edition" can cause rather a lot of
problems on RAID systems. We have a few machines with LSI controllers
(6801/6081/9201) and we're seeing massive errors occuring. The usual pattern is
a drive failing or even a resilver/scrub starting and then, suddenly, most
drives on the whole backplane report errors. These are usually No Device (as
reported by iostat -En), but the result is that we may see data corruption at
the end. We also have a system setup with Hitachi Deskstars, which has been
running for almost a year without issues. One system with a mixture of WD
Blacks and greens showed the same errors as described, but has been working
well after the WD drives were replaced by deskstars.
Now, it seems WD has changed their firmware to inhibit people from using them
for other things than toys (read: PCs etc). Since we've seen this issue on
different controllers and different drives, and can't reproduce it with Hitachi
Deskstars, I would guess the firmware "upgrade" from WD is the issue.
Would it be possible to fix this in ZFS somehow? The drives seem to work well
except for those "No Device" errors....
Vennlige hilsener / Best regards
Roy Sigurd Karlsbakk
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et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av
idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og
relevante synonymer på norsk.
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