linux-kernel - Re: [smartmontools-support] SMART to USB/sata dock in 2.6.27-rc5 doesn't work

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Date:	Thu, 23 Oct 2008 12:04:55 -0400
From:	Mark Lord <liml@....ca>
To:	matthieu castet <castet.matthieu@...e.fr>
Cc:	Tejun Heo <tj@...nel.org>, David Greaves <david@...eaves.com>,
	linux-ide@...r.kernel.org,
	Smartmontools Mailing List 
	<smartmontools-support@...ts.sourceforge.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [smartmontools-support] SMART to USB/sata dock in 2.6.27-rc5
 doesn't work

matthieu castet wrote:
> Hi,
> 
> Tejun Heo wrote:
>> David Greaves wrote:
>>> Error Counter logging not supported
>>> Device does not support Self Test logging
>>
>> The USB bridge should support SAT (SCSI-ATA translation) and many
>> don't.  Nothing much can be done about it.  The hardware just don't know
>> how to do it.
>>
> That true that the hardware should support SAT, but even if it support 
> it, linux need some patches to support SAT over USB. See 
> http://thread.gmane.org/gmane.linux.scsi/43688 and the patch mentioned 
> in the thread.
...

Ahh.. Great!  This mostly fixes smartctl operation on at least two
of my USB drive enclosures here:

    1. a recent rev.  2.5" NexStar-3 SATA enclosure.
    2. a 250GB 2.5" WD "Passport" external USB drive/enclosure.

With the patch, this command line works for me:

    smartctl -a -dsat -T permissive /dev/sdb 

And hdparm just works regardless, with or without the patch.


> 
> Unfortunately I am a bit busy to try to resubmit it. But I won't care if 
> somebody improve it/resubmit it ;)
> 
> Matthieu
> 
> PS : there also  http://thread.gmane.org/gmane.linux.usb.general/7145 
> that is pending.
> 
> 
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