zfs discuss - Apr 2010 - zpool lists 2 controllers the same, how do I replace one?

Hello.

zpool lists my pool as having 2 disks which have identical names.  One
is offline, the other is online.  How do I tell zpool to replace the
offline one?  I want to replace the offline c5t5d0 with c5t2d0 but
when I run the command:

pfexec zpool replace -f space c5t5d0 c5t2d0

I get the error:

cannot replace c5t5d0 with c5t2d0: c5t2d0 is busy

here is the status of my pool:
zpool status -v space
  pool: space
 state: DEGRADED
status: One or more devices has been taken offline by the administrator.
        Sufficient replicas exist for the pool to continue functioning
in a  degraded state.
action: Online the device using ''zpool online'' or replace the
device
with  ''zpool replace''.
 scrub: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        space       DEGRADED     0     0     0
          raidz1-0  DEGRADED    0     0     0
            c5t3d0  ONLINE          0     0     0
            c5t4d0  ONLINE          0     0     0
            c5t5d0  ONLINE          0     0     0
            c5t5d0  OFFLINE         0     0     0

errors: No known data errors

How can I replace the offline disk?

Michelle

On Sun, 18 Apr 2010, Michelle Bhaal wrote:
> zpool lists my pool as having 2 disks which have identical names.  One 
> is offline, the other is online.  How do I tell zpool to replace the 
> offline one?
If you''re lucky, the device will be marked as not being present, and
then
you can use the GUID.

To find out, use the command "zdb -C" to dump out the configuation 
information.  In the output, look for the offline disk (it should be under 
a heading "children[3]").  If the "not_present" value is
there, then you
can use the guid to do the replace.  The guid is the really long number 
listed after the "id" value (which should also be 3 in your config).

# zpool replace space <really long number> <new disk>

> If you''re lucky, the device will be marked as not being present,
and then
> you can use the GUID.
> To find out, use the command "zdb -C" to dump out the
configuation
> information.  In the output, look for the offline disk (it should be under 
> a heading "children[3]").  If the "not_present" value
is there, then you
> can use the guid to do the replace.  The guid is the really long number 
> listed after the "id" value (which should also be 3 in your
config).
What if not_present isn''t there;

            children[1]:
                type: ''disk''
                id: 1
                guid: 9311942279929207354
                path: ''/dev/dsk/c6t33d0s0''
                devid: ''id1,sd at n50014ee0010dd179/a''
                phys_path: ''/pci at 0,0/pci8086,340e at 7/pci8086,32c
at 0/pci1028,1f04 at 8/sd at 21,0:a''
                whole_disk: 1
                DTL: 584
                create_txg: 40

            children[14]:
                type: ''disk''
                id: 14
                guid: 13886071452172028089
                path: ''/dev/dsk/c6t33d0s0''
                devid: ''id1,sd at n50014ee101e8fc90/a''
                phys_path: ''/pci at 0,0/pci8086,340e at 7/pci8086,32c
at 0/pci1028,1f04 at 8/sd at 21,0:a''
                whole_disk: 1
                DTL: 449
                create_txg: 64771

Other is failed and other is online on pool, in different raidz2-sets

Yours
Markus Kovero