hot-attach SATA drive

[Alexander Motin]

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