Tom Bird wrote: > Hi, > > Have a problem with a ZFS on a single device, this device is 48 1T SATA > drives presented as a 42T LUN via hardware RAID 6 on a SAS bus which had > a ZFS on it as a single device. > > There was a problem with the SAS bus which caused various errors > including the inevitable kernel panic, the thing came back up with 3 out > of 4 zfs mounted. > > I've tried reading the partition table with format, works fine, also can > dd the first 100G from the device quite happily so the communication > issue appears resolved however the device just won't mount. Googling > around I see that ZFS does have features designed to reduce the impact > of corruption at a particular point, multiple meta data copies and so > on, however commands to help me tidy up a zfs will only run once the > thing has been mounted. >
You should also check the end of the LUN. ZFS stores its configuration data at the beginning and end of the LUN. An I/O error is a fairly generic error, but it can also be an indicator of a catastrophic condition. You should also check the system log in /var/adm/messages as well as any faults reported by fmdump. In general, ZFS can only repair conditions for which it owns data redundancy. In this case, ZFS does not own the redundancy function, so you are susceptible to faults of this sort. -- richard > Would be grateful for any ideas, relevant output here: > > [EMAIL PROTECTED]:~# zpool import > pool: content > id: 14205780542041739352 > state: FAULTED > status: The pool metadata is corrupted. > action: The pool cannot be imported due to damaged devices or data. > The pool may be active on on another system, but can be imported > using > the '-f' flag. > see: http://www.sun.com/msg/ZFS-8000-72 > config: > > content FAULTED corrupted data > c2t9d0 ONLINE > > [EMAIL PROTECTED]:~# zpool import content > cannot import 'content': pool may be in use from other system > use '-f' to import anyway > > [EMAIL PROTECTED]:~# zpool import -f content > cannot import 'content': I/O error > > [EMAIL PROTECTED]:~# uname -a > SunOS cs3.kw 5.10 Generic_127127-11 sun4v sparc SUNW,Sun-Fire-T200 > > > Thanks > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
