Auto-shutdown on degraded? | Thecus User Group

nogami
Junior Member

Posts: 68

Auto-shutdown on degraded? Oct 16, 2007 14:54:59 GMT 7

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Post by nogami on Oct 16, 2007 14:54:59 GMT 7

Wondering if someone might be able to cook up a module to auto-shutdown (with adjustable delay?) for when a drive comes up as degraded.

Might be handy to have as an option on a raid-5 box so the system auto-shuts-down after a drive has gone bad, giving time to put a replacement in with the least possible chance of another drive failing during the degraded period.

Possible?

rookie
Full Member

Posts: 194

Auto-shutdown on degraded? Oct 16, 2007 16:08:13 GMT 7

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Post by rookie on Oct 16, 2007 16:08:13 GMT 7

I think that's a bit tricky, because there is also a big risk in stopping harddisks that have run for a long time. They might never start up again, resulting in a lost RAID-set.

Maybe one risk is a bit higher than the other, but I think it's something to take notice of.

unit: N4200 (fw 3.03.00.4)
modules: IPCAM,USBCOPY,DLM2,USB_ESATA_BACKUP,INFO,SSHD,SYSUSER
disks: Samsung HD501LJ (2), WD WD1503FYYS (2)
raid: 0 + 1
filesystem: XFS

sauron
New Member

Posts: 41

Auto-shutdown on degraded? Oct 18, 2007 5:56:15 GMT 7

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Post by sauron on Oct 18, 2007 5:56:15 GMT 7

Drive failures are definitely more likely on startup - that's when there is peak strain on the motor and the drive suffers the largest thermal gradient as it warms up. It wouldn't be hard to implement this, but it wouldn't enhance data safety either, unless you go a long time before you replace the drive.