have you tried gmirror activate gm0 ad10?
if there is a problem with your ad10 drive it may throw you an error like "Not all disks connected"
I've seen disks disappear from arrays when the disk failed - but typically they'd also fail to show up in /dev/. You might see some errors in /var/log/messages indicating bad inodes or something, but if this was a spontaneous failure there won't be anything there. It is also unusual that when you execute gmirror status you don't see the ad10 drive rebuilding. What's your /etc/fstab look like?
Last edited by dk_netsvil; 15th July 2008 at 08:25 PM.
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