Hi All,
I've been using ZFS for a while now - and everything's been going well. I
use it under FreeBSD - but this question almost certainly should be the
same answer, whether it's FreeBSD or Solaris (I think/hope :)...
Imagine if I have a zpool with 2 disks in it, that are mirrored:
"
NAME STATE READ WRITE CKSUM
vol ONLINE 0 0 0
mirror ONLINE 0 0 0
ad1 ONLINE 0 0 0
ad2 ONLINE 0 0 0
"
(The device names are FreeBSD disks)
If I offline 'ad2' - and then did:
"
dd if=/dev/ad1 of=/dev/ad2
"
(i.e. make a mirror copy of ad1 to ad2 - on a *running* system).
What would happen when I tried to 'online' ad2 again?
I fully expect it might not be pleasant... I'm just curious as to what's
going to happen.
When I 'online' ad2 will ZFS look at it, and be clever enough to figure out
the disk is obviously corrupt/unusable/has bad meta data on it - and
resilver accordingly?
Or is it going to see what it thinks is another 'ad1' and get a little
upset?
I'm trying to setup something here so I can test what happens - I just
thought I'd ask around a bit to see if anyone knows what'll happen from
past experience.
Thanks,
-Karl
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