[OpenIndiana-discuss] Problems with two disks after Hypervisor switched Disk paths

[Till Wegmüller]

Hrmm yeah I think it's no problem with the pool but rather something
with the Solaris device management I am not getting.

c14t0d0 is recognized as new disk by format but what is anoying though
is this:

# zpool add -f tank spare c14t0d0
invalid vdev specification
the following errors must be manually repaired:
/dev/dsk/c18t0d0s0 is part of active ZFS pool bkpool. Please see zpool(1M).

Which makes me think that there is still a label on that disk somewhere.
Anybody any ideas?


Thanks and Greetings
Till

On 09.01.2018 03:46, Warren Marts wrote:
> Writing 1 MB of zeros to the raw disk device has always been enough to make
> sure a drive is treated as new.
> 
> My experience is mostly with FreeBSD, but a zpool export .. reboot .. zpool
> import [-f] cycle has fixed up things for me before. Or zpool clear
> <device> .....
> 
> On Solaris based systems I understand the FMA may need to be examined or
> cleared.
> 
> On Jan 8, 2018 9:48 AM, "Till Wegmüller" <toasterson at gmail.com> wrote:
> 
>> Hello Community
>>
>> I am a bit stuck with two disks which don't want to attach to a zpool
>> after being removed from the pool.
>>
>> Story: We have a KVM-VM running OpenIndiana on a Linux host. the Guest
>> VM has a Zpool with about 10 disks. Passed through from the host via
>> virtio. After a Host Reboot Linux decided to switch around the disk
>> names. (Linux likes to to that) Thus the directly passed through disks
>> to the Guest got switched around aswell. Three devices seem to have been
>> affected. two of them where hot spares so no data loss. I managed to get
>> the Zpool working again by replacing the missing disk with c18t0d0.
>> However c14t0d0 and c15t0d0 do not want to be added as hot spares anymore.
>>
>> c15t0d0 is an odd case If I try to access the disk with dd it says No
>> such device or address. Same with zpool labelclear and friends.
>>
>> I tried to wipe every piece kind of zfs label on c14t0d0 including all
>> partitions with format. If I now try to use format again to start from
>> scratch It asks me to set the disk type only to tell me that the
>> partition is in use. Does anybody know how to reset a disk like this
>> short from dd'ing with zero the whole disk?
>>
>> Short from dd'ing the whole disks zero which are 3TB so.... I am out of
>> ideas? Has anybody an idea what I could do with these disks to be able
>> to attach them to the zpool ?
>>
>> Also everytime I try to do anything with c14t0d0 it says c18t0d0 (notice
>> the name difference) is already part of the pool. Does anybody know why
>> zpool thinks c14t0d0 is c18t0d0?
>>
>> Thanks in advance and Greetings
>> Till
>>
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