On Thu, 26 Nov 1998, Kent wrote:

> Is there anyway I can test RAID5 automatic reconstruction by making an
> error on the drives in some way with out damaging them?
> I want to see it resync recovery performence... i.e. how long it takes
> to get back to the full operation mode rather than degraded mode.

this what i use:

        echo "scsi remove-single-device 0 0 3 0" >/proc/scsi/scsi

this immediately unregisters the 0,0,3,0 drive (interface,channel,ID,lun) 
from the kernel, making any further IO to this drive fail.

-- mingo

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