Re: hot-attach SATA drive

Andriy Gapon wrote:
on 30/03/2009 14:14 Alexander Motin said the following:
Andriy Gapon wrote:
Recently I tried to hot-attach a SATA drive to a running system.
Controller is ICH9 in AHCI mode. Physically/electronically everything went
smoothly, the drive spun-up. Then I tried to detach and re-attach all channels
with no devices on them using atacontrol. I did it 3 times to be sure, but no new
disk showed up. Then I finally rebooted, the disk showed up OK.

Question: was hot-attach expected to work? Is there a limitation in hardware or in
our driver?

Note: I attached the drive to a regular SATA port, not eSATA.
Which system version do you use? With recent CURRENT I have successfully
tested insert/remove SATA drives with ICH8, ICH8M and JMB363 AHCI
controllers channel attach/detach. Theoretically it is possible to
insert/remove SATA drives even without channel attach/detach. Remove
works fine, but such really hot insertion functionality is not
implemented properly now and so blocked.

It was stable/7, amd64.
Maybe there is a small subset of the changes in current that I could try in stable/7?

There is significant sources difference due to modularization work done
on CURRENT, so it is not so easy to directly compare sources or backport
something. I haven't actually looked on/tested 7-STABLE much.

--
Alexander Motin
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