I would like advise about how to replace a raid 0 lun. The lun is basically a
raid 0 lun which is from a single disk volume group / volume from our Flexline
380 unit. So every disk in the unit is a volume group/volume/lun mapped to the
host. We then let ZFS do the raid.
We have a lun now which has been getting read errors and basically the
underlying drive needs to be replaced. I've done this in the past but as I
remember it was cumbersome and didn't go that smoothly so I would like some
advise about how to go about it. As I recall if you just fail the disk via
Santricity, the lun really doesn't go offline from a host point of via and
hence ZFS still tries to write to the lun/disk. I believe I either unmapped
the lun to the host at which point ZFS kicked in a hot spare, or I offlined the
disk via ZFS first. Then at that point the drive can be replace on the storage
and the volume re-initialized then remapped back to the host. So part of my
question... does the above sound reasonable, or should I be doing this
differently? Also I'm a little unsure about how to get the original lun back
in operation and the spare back to a spare.
For example I have the following situation now:
raidz2 ONLINE 0 0 0
c10t600A0B800011399600007CF945E80E95d0 ONLINE 0 0 0
c10t600A0B8000115EA20000FEEB45E8145Ed0 ONLINE 0 0 0
spare ONLINE 0 0 0
c10t600A0B800011399600007D2345E81075d0 ONLINE 0 0 0
c10t600A0B800011399600007CE145E80D4Dd0 ONLINE 0 0 0
c10t600A0B800011399600007D3F45E81157d0 ONLINE 0 0 0
c10t600A0B8000115EA20000FF1145E817BEd0 ONLINE 0 0 0
c10t600A0B800011399600007D5D45E813EBd0 ONLINE 0 0 0
c10t600A0B8000115EA20000FE7D45E80CDEd0 ONLINE 0 0 0
c10t600A0B800011399600007C6145E808C7d0 ONLINE 0 0 0
c10t600A0B8000115EA20000FE9945E80E6Ad0 ONLINE 0 0 0
c10t600A0B800011399600007C8B45E80A59d0 ONLINE 0 0 0
c10t600A0B800011399600007CA745E80B21d0 ONLINE 0 0 0
c10t600A0B8000115EA20000FEB545E810D4d0 ONLINE 0 0 0
c10t600A0B800011399600007CD145E80CD7d0 ONLINE 0 0 0
c10t600A0B8000115EA20000FED145E8129Cd0 ONLINE 0 0 0
c10t600A0B800011399600007CFB45E80EA5d0 ONLINE 0 0 0
c10t600A0B8000115EA20000FEED45E8146Ed0 ONLINE 0 0 0
spares
c10t600A0B800011399600007CE145E80D4Dd0 INUSE currently in use
c10t600A0B8000115EA20000FEE145E81328d0 AVAIL
c10t600A0B800011399600007D0B45E80F21d0 AVAIL
c10t600A0B8000115EA20000FEFD45E81506d0 AVAIL
c10t600A0B800011399600007D3545E81107d0 AVAIL
c10t600A0B800011399600007D5345E81289d0 AVAIL
c10t600A0B8000115EA20000FF2345E81864d0 AVAIL
c10t600A0B800011399600007D6F45E8149Bd0 AVAIL
I thought if I replace the original device with the same (but new) lun that
should work, but I get
the following:
zpool replace tank c10t600A0B800011399600007D2345E81075d0
c10t600A0B800011399600007D2345E81075d0
invalid vdev specification
use '-f' to override the following errors:
/dev/dsk/c10t600A0B800011399600007D2345E81075d0s0 is part of active ZFS pool
tank. Please see zpool(1M).
The above lun is the same as before, but the underlying disk on the storage was
replaced. Do I need to do something to this lun to make ZFS think it is a new
disk? Or should I be doing something different?
I now have another disk which has gone back so I need to fix my above situation
with the hot
spare first, and then go through the process again for my second failure.
The environment is S10U4, running on a x4600 with Flexline 380 storage units.
Tia,
David
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