Hi Was having a play with creating pools and whilst trying to create a mirror with two ide disks got the following:
paulj at opensolaris4:~$ pfexec zpool create newpool1 mirror c5d0 c5d1 invalid vdev specification use '-f' to override the following errors: /dev/dsk/c5d0s0 is part of exported or potentially active ZFS pool mypool1. Please see zpool(1M). Looking at the disks available paulj at opensolaris4:~$ pfexec format Searching for disks...done AVAILABLE DISK SELECTIONS: 0. c4d0 <DEFAULT cyl 5001 alt 2 hd 255 sec 63> /pci at 0,0/pci-ide at 11,1/ide at 0/cmdk at 0,0 1. c5d0 <ST380011-5JVS7DE-0001-74.53GB> /pci at 0,0/pci-ide at 11,1/ide at 1/cmdk at 0,0 2. c5d1 <ST380011-5JVS5GH-0001-74.53GB> /pci at 0,0/pci-ide at 11,1/ide at 1/cmdk at 1,0 Specify disk (enter its number): paulj at opensolaris4:~$ pfexec zpool list NAME SIZE USED AVAIL CAP HEALTH ALTROOT rpool 36.2G 11.9G 24.4G 32% ONLINE - paulj at opensolaris4:~$ pfexec zpool status mymirror1 cannot open 'mymirror1': no such pool Or even: paulj at opensolaris4:~$ pfexec zpool status pool: rpool state: ONLINE status: The pool is formatted using an older on-disk format. The pool can still be used, but some features are unavailable. action: Upgrade the pool using 'zpool upgrade'. Once this is done, the pool will no longer be accessible on older software versions. scrub: none requested config: NAME STATE READ WRITE CKSUM rpool ONLINE 0 0 0 c4d0s0 ONLINE 0 0 0 errors: No known data errors Any ideas about this mypool1 and how to kill it safely? I used the -f option and created the pool successfully but am rather curious. The machine has been quite messed about and it's possible the disk c5d0 may have been used in another config. Regards Paul