Re: Uneven load on drives in ZFS RAIDZ1

On Mon, 19 Dec 2011, Peter Maloney wrote:
....
> Thanks for the info. But I am confused by it, because when my disks
> moved around randomly on reboot, it really did mess things up. The first
> few times it happened, there was no issue, but when a spare took the
> place of a pool disk, it messed things up. I can see the UUIDs when I
> look at zdb output, so I really have no idea why it messed things up.
> ... but it did, so I will always caution people anyway. I can't point
> you to any relevant lines of code that cause the problem, but I know it
> can happen... and it will when you least expect it. ;)
>

Normaly spare disks are not part of the pool so it can't replace
a pools disk automatically (except the property 'autoreplace' is set to 'on').

But as allways no software is error free and your issue could be an uncaught
edge case of something.

Theoretically it could be an timing issue during boot too due to the async
GEOM/CAM nature...

Bye/2
---
Michael Reifenberger
Michael@Reifenberger.com
http://www.Reifenberger.com

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