Fajun Chen wrote:
You can use SCSI userscan interface.
Is this a scsi command? I looked at scsi spec and haven't found it
yet. I know how to initiate user scan from proc or sysfs,
Yeap, that's what I meant.
but there is
no way to know the result of user scan through proc or sysfs. I'm
looking for a way to check when a pata drive is back online after a
power cycle. May I issue userscan periodically until its result
indicates pata drive is available?
Hmmm.. When new devices are attached, hotplug events are generated. I
think that's the only way to get any result back, so when it fails,
there's no indication. Periodically repeating userscan request should
be fine although it may result in an extra reset after successfully
detecting the device. That shouldn't hurt too much.
--
tejun
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