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Date: Mon, 30 Mar 2009 14:57:43 +0300
From: Andriy Gapon <avg@icyb.net.ua>
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To: Alexander Motin <mav@FreeBSD.org>
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Cc: freebsd-hackers@FreeBSD.org
Subject: Re: hot-attach SATA drive
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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?

-- 
Andriy Gapon