Comments on: Replacing failed disk drives in a ZFS pool http://prefetch.net/blog/index.php/2007/02/14/replacing-failed-disk-drives-in-a-zfs-pool/ Blog O' Matty Tue, 07 Feb 2012 02:31:44 +0000 hourly 1 By: Gabriele Bulfon http://prefetch.net/blog/index.php/2007/02/14/replacing-failed-disk-drives-in-a-zfs-pool/comment-page-1/#comment-390095 Gabriele Bulfon Thu, 17 Apr 2008 08:45:21 +0000 http://prefetch.net/blog/index.php/2007/02/14/replacing-failed-disk-drives-in-a-zfs-pool/#comment-390095 Hi, I had a similar situation, but I'm having some trouble. In my case, I had no spare, just 4 disks in raidz1 config. I had no failure singals on zpool, but heavy slow downs. So I found hardware errors on /var/adm/messages. A technician went to the customer and added a new disk, then I asked him to run the replace command, but he did differently by mistake, and created a spare with both the failing disk and the new disk. The failing disk is now offline, and the new spare is using the new disk, but the system is still slow, and zpool signal the degraded state. I would like to return to my original situation, with no spare, because this way I cannot remove the failing disk from the zpool (only spare can be removed...). Do I risk anything if I remove the spare, leaving just the 3 disks running for a moment? What will happen when I then add the new disk to the zpool? Will it start a new sync? I mean...it should be already synced as it was already running in the spare...will the system accept it as another disk even if it was added as spare before? Thanx for any help. Gabriele Bulfon. Hi, I had a similar situation, but I’m having some trouble.
In my case, I had no spare, just 4 disks in raidz1 config.
I had no failure singals on zpool, but heavy slow downs. So I found hardware errors on /var/adm/messages. A technician went to the customer and added a new disk, then I asked him to run the replace command, but he did differently by mistake, and created a spare with both the failing disk and the new disk.
The failing disk is now offline, and the new spare is using the new disk, but the system is still slow, and zpool signal the degraded state.
I would like to return to my original situation, with no spare, because this way I cannot remove the failing disk from the zpool (only spare can be removed…).
Do I risk anything if I remove the spare, leaving just the 3 disks running for a moment?
What will happen when I then add the new disk to the zpool? Will it start a new sync? I mean…it should be already synced as it was already running in the spare…will the system accept it as another disk even if it was added as spare before?

Thanx for any help.
Gabriele Bulfon.

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