[zfs-discuss] Permanently using hot spare?
Have a failed drive on a ZFS pool (three RAIDZ2 vdevs, one hot spare). The hot spare kicked in and all is well. Is it possible to just make that hot spare disk -- already silvered into the pool -- as a permanent part of the pool? We could then throw in a new disk and mark it as a spare and avoid what would seem to be an unnecessary resilver (twice, once when the spare is brought in and again when we replace the failed disk). This document[1] seems to make it sound like it can be done, but I'm not really seeing how... Can I add the spare disk to the pool when it's already in use? Probably not... Note this is on Solaris 10 U9. Thanks, Ray [1] http://dlc.sun.com/osol/docs/content/ZFSADMIN/gayrd.html#gcvcw ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Permanently using hot spare?
Just detach the faulty disk, then the spare will become the normal disk once it's finished resilvering. #zfs detach pool fault_device_name Then you need to the new spare : #zfs add pool new_spare_device There seems to be a new feature in illumos project to support a zpool property like spare promotion, which would not require the manual detach operation. Tianhong -Original Message- From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Ray Van Dolson Sent: Thursday, May 05, 2011 5:53 PM To: zfs-discuss@opensolaris.org Subject: [zfs-discuss] Permanently using hot spare? Have a failed drive on a ZFS pool (three RAIDZ2 vdevs, one hot spare). The hot spare kicked in and all is well. Is it possible to just make that hot spare disk -- already silvered into the pool -- as a permanent part of the pool? We could then throw in a new disk and mark it as a spare and avoid what would seem to be an unnecessary resilver (twice, once when the spare is brought in and again when we replace the failed disk). This document[1] seems to make it sound like it can be done, but I'm not really seeing how... Can I add the spare disk to the pool when it's already in use? Probably not... Note this is on Solaris 10 U9. Thanks, Ray [1] http://dlc.sun.com/osol/docs/content/ZFSADMIN/gayrd.html#gcvcw ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Permanently using hot spare?
On 05/ 6/11 09:53 AM, Ray Van Dolson wrote: Have a failed drive on a ZFS pool (three RAIDZ2 vdevs, one hot spare). The hot spare kicked in and all is well. Is it possible to just make that hot spare disk -- already silvered into the pool -- as a permanent part of the pool? We could then throw in a new disk and mark it as a spare and avoid what would seem to be an unnecessary resilver (twice, once when the spare is brought in and again when we replace the failed disk). Yes, as Tianhong just posted, just detach the faulted device. What you describe is what I normally do, add the original drive back as a spare when it is replaced. -- Ian. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Permanently using hot spare?
On Thu, May 05, 2011 at 03:13:06PM -0700, TianHong Zhao wrote: Just detach the faulty disk, then the spare will become the normal disk once it's finished resilvering. #zfs detach pool fault_device_name Then you need to the new spare : #zfs add pool new_spare_device There seems to be a new feature in illumos project to support a zpool property like spare promotion, which would not require the manual detach operation. Tianhong Thanks! Great tip. Ray ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
