Hi All,
I recently shut down and moved my x86 solaris 11 server, with 1 boot drive and a 9 disk zpool, from one room to another, only to find that it wouldn't boot. (During this exercise I opened the server and cleared out about 3 years worth of dust).
Some nosing around found that one of power cables had come loose for one of the drives in the array (3 sets x3 disks, making up the pool). I reconnected the drive, recovered the boot_archive after booting from the Live CD (looks like the shutdown wasn't clean originally) and, voila, the system was up and running again as before.... almost.
One oddity: My 9 disk zpool was unavailable with a total of 5 disks showing as unavailable... What?!
(No read, write, cksum errors anywhere in the below list)
raidz1-0 DEGRADED
c14t1d0
c15t1d0
c8t0d0 UNAVAIL
raidz1-1 UNAVAIL
c15t0d0
c8t2d0 UNAVAIL
c8t3d0 UNAVAIL
raidz1-2 UNAVAIL
c14t0d0
c8t5d0 UNAVAIL
c8t4d0 UNAVAIL
When I run 'format', I discover that there's a whole new naming convention being used on the drives, c14t0d0, c14t1d0, c15t0d0, c15t1d0, c16d0, c16d1, c17d0, c17d1, c18d0, c19d1. The first 4 may 'look' the same but I've no reason to presume that they correspond to the original numbering now either. All the devices are showing as working and accessible in 'format' with no errors appearing it's just that they no longer correlate with what they used to be.
Is there any way to make solaris look at the device contents and zpool layout to basically say, "Ok well this device is actually that one over there in raidz1-0 and this other device is actually that disk in raidz1-1 etc"?
Considering it's common for things like controllers to fail, zpools to be moved etc, I'm assuming it's common for the device ID to change and need to be remapped, I've just no idea how. I had started to test with "zpool clear mypool c8t0d0" but it had reported no such device. It was that point at which I realised, the devices weren't missing at all, their IDs had changed (seemingly) all by themselves.
I'm a little wary of touching the array until I know what to do, assuming it is still recoverable. The disks were inaccessible after the move and the whole array is offline, it's reasonable to assume the data is all intact, if only there's a way to remap the new device IDs onto the zpool.
KR
Andrew