This is the problem... I can not create such pool including the second and third disk, because second disk is already in the root pool (rpool)...
root at HgS:~# zpool create hgpool c8d1 c9d0 invalid vdev specification use '-f' to override the following errors: /dev/dsk/c8d1s0 is part of active ZFS pool rpool. Please see zpool(1M). Nevertheless, if I create separate zpool adding just one (third) disk to it and creating file system on it zfs create hgpool/mercurial and zfs list output: NAME USED AVAIL REFER MOUNTPOINT hgpool 98K 457G 19K /hgpool hgpool/mercurial 19K 457G 19K /hgpool/mercurial rpool 6.98G 221G 81K /rpool rpool/ROOT 3.90G 221G 19K legacy rpool/ROOT/opensolaris 33.2M 221G 3.72G / rpool/ROOT/opensolaris-1 3.87G 221G 3.72G / rpool/dump 1.50G 221G 1.50G - rpool/export 76.7M 221G 21K /export rpool/export/home 76.7M 221G 21K /export/home rpool/export/home/pili 76.6M 221G 76.6M /export/home/pili rpool/swap 1.50G 223G 101M - ... then the system could not boot (stopped at listing devices). I could not even enter BIOS setup. -- This message posted from opensolaris.org