Re: [zfs-discuss] Trouble testing hot spares
On Oct 21, 2009, at 5:18 PM, Ian Allison wrote: Hi, I've been looking at a raidz using opensolaris snv_111b and I've come across something I don't quite understand. I have 5 disks (fixed size disk images defined in virtualbox) in a raidz configuration, with 1 disk marked as a spare. The disks are 100m in size and I wanted simulate data corruption on one of them and watch the hot spare kick in, but when I do dd if=/dev/zero of=/dev/c10t0d0 ibs=1024 count=102400 Should be: of=/dev/c10t0d0s0 ZFS tries to hide the slice from you, but it really confuses people by trying to not be confusing. -- richard The pool remains perfectly healthy pool: datapool state: ONLINE scrub: scrub completed after 0h0m with 0 errors on Wed Oct 21 17:12:11 2009 config: NAME STATE READ WRITE CKSUM datapool ONLINE 0 0 0 raidz1 ONLINE 0 0 0 c10t0d0 ONLINE 0 0 0 c10t1d0 ONLINE 0 0 0 c10t2d0 ONLINE 0 0 0 c10t3d0 ONLINE 0 0 0 spares c10t4d0AVAIL errors: No known data errors I don't understand the output, I thought I should see cksum errors against c10t0d0. I tried exporting/importing the pool and scrubbing it incase this was a cache thing, but nothing changes. I've tried this on all the disks in the pool with the same result and the datasets in the pool is uncorrupted. I guess I'm misunderstanding something fundamental about ZFS, can anyone help me out and explain. -Ian. z ___ 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] Trouble testing hot spares
On Oct 22, 2009, at 4:18, Ian Allison i...@pims.math.ca wrote: Hi, I've been looking at a raidz using opensolaris snv_111b and I've come across something I don't quite understand. I have 5 disks (fixed size disk images defined in virtualbox) in a raidz configuration, with 1 disk marked as a spare. The disks are 100m in size and I wanted simulate data corruption on one of them and watch the hot spare kick in, but when I do dd if=/dev/zero of=/dev/c10t0d0 ibs=1024 count=102400 The pool remains perfectly healthy Try of=/dev/rdsk/c10t0d0s0 and see what happens Victor pool: datapool state: ONLINE scrub: scrub completed after 0h0m with 0 errors on Wed Oct 21 17:12:11 2009 config: NAME STATE READ WRITE CKSUM datapool ONLINE 0 0 0 raidz1 ONLINE 0 0 0 c10t0d0 ONLINE 0 0 0 c10t1d0 ONLINE 0 0 0 c10t2d0 ONLINE 0 0 0 c10t3d0 ONLINE 0 0 0 spares c10t4d0AVAIL errors: No known data errors I don't understand the output, I thought I should see cksum errors against c10t0d0. I tried exporting/importing the pool and scrubbing it incase this was a cache thing, but nothing changes. I've tried this on all the disks in the pool with the same result and the datasets in the pool is uncorrupted. I guess I'm misunderstanding something fundamental about ZFS, can anyone help me out and explain. -Ian. z ___ 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
