On Fri, 10 Apr 2009, Rince wrote:
FWIW, I strongly expect live ripping of a SATA device to not panic the disk layer. It explicitly shouldn't panic the ZFS layer, as ZFS is supposed to be "fault-tolerant" and "drive dropping away at any time" is a rather expected scenario.
Ripping a SATA device out runs a goodly chance of confusing the controller. If you'd had this problem with fibre channel or even SCSI, I'd find it a far bigger concern. IME, IDE and SATA just don't hold up to the abuses we'd like to level at them. Of course, this boils down to controller and enclosure and a lot of other random chances for disaster.
In addition, where there is a procedure to gently remove the device, use it. We don't just yank disks from the FC-AL backplanes on V880s, because there is a procedure for handling this even for failed disks. The five minutes to do it properly is a good investment compared to much longer downtime from a fault condition arising from careless manhandling of hardware.
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