From: Douglas Gilbert <dougg@torque.net>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: linux-scsi@vger.kernel.org
Subject: Re: sdparm cannot start or stop SATA disks
Date: Sat, 30 Jul 2005 13:25:43 +1000 [thread overview]
Message-ID: <42EAF337.8040601@torque.net> (raw)
In-Reply-To: <42EA553A.1070304@pobox.com>
Jeff Garzik wrote:
> Douglas Gilbert wrote:
>
>> sdparm uses the START STOP UNIT SCSI command to start
>> and stop (spin up and spin down) SCSI devices.
>> Currently libata does not implement that SCSI command.
>> [Hopefully Jeff contradicts me.]
>
>
> Correct.
>
> Someone should submit a libata patch for this!
Jeff,
A further thought about implementing the START STOP
UNIT SCSI command in libata: the TEST UNIT READY
SCSI command should become more than just a no-op.
Additional sense code 4 ("Logical unit not ready, ...")
seems to have a special for SAS (including SAS's ability
to hold a SATA disk spun down at power on):
ASC/ASCQ=[0x4,0x11] "Logical unit not ready, notify
(enable spinup) required".
Doug Gilbert
next prev parent reply other threads:[~2005-07-30 3:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-29 10:47 sdparm cannot start or stop SATA disks Douglas Gilbert
2005-07-29 16:02 ` Mogens Valentin
2005-07-29 16:11 ` Jeff Garzik
2005-07-30 3:06 ` Douglas Gilbert
2005-07-30 3:56 ` Jeff Garzik
2005-07-30 3:25 ` Douglas Gilbert [this message]
2005-07-30 3:54 ` Jeff Garzik
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