After a disk's disappearance, ar0 (raid5) hung...

[Mikhail T.]

All of a sudden, one of the three parts (ad8) of my ar0 threw a fit. As
one might expect, the OS logged the event and told me, the array is now
in degraded mode.

Unfortunately, all I/O on the array is hanging. The machine is otherwise
responsive, but processes trying to access the array hang in either
"biord" or "getblk". I'm pretty sure, that, if I reboot, things will get
back to normal. But I was hoping to buy some redundancy by using RAID5...

If anybody is interested in any diagnostics -- let me know, I'll hold
off rebooting for 12 hours. Yours,

    -mi