From: Douglas Gilbert <dgilbert@interlog.com>
To: Jan Engelhardt <jengelh@medozas.de>
Cc: linux-scsi@vger.kernel.org
Subject: Re: hdparm with USB disk
Date: Wed, 18 Mar 2009 08:44:41 -0400 [thread overview]
Message-ID: <49C0ECB9.2030500@interlog.com> (raw)
In-Reply-To: <alpine.LSU.2.00.0903181226530.27821@fbirervta.pbzchgretzou.qr>
Jan Engelhardt wrote:
> Hi,
>
>
> so it happens I have to work with one of those shitty "green" devices
> again that think their power management is smarter than me.
> Unfortunately, hdparm just does not fly with USB devices, so what is the
> preferred tool here?
>
> # hdparm -B 254 /dev/sdb
>
> /dev/sdb:
> setting Advanced Power Management level to 0xfe (254)
> HDIO_DRIVE_CMD failed: Input/output error
A SAT layer that supports the SCSI ATA PASS-THROUGH command
is required in the device. Some USB external drives (often
from major disk manufacturers) now support that.
A version of hdparm that knows about SAT is also required.
From memory that is from around hdparm version 7.0 onwards.
Doug Gilbert
prev parent reply other threads:[~2009-03-18 12:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-18 11:29 hdparm with USB disk Jan Engelhardt
2009-03-18 12:44 ` Douglas Gilbert [this message]
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