[2250] in linux-scsi channel archive
Re: How to turn power off on an idle scsi drive.
daemon@ATHENA.MIT.EDU (Gabriel Paubert)
Tue Aug 5 00:05:02 1997
Date: Tue, 5 Aug 1997 03:14:07 +0200 (METDST)
From: Gabriel Paubert <paubert@iram.es>
To: Hein Roehrig <roehrig@mpi-sb.mpg.de>
cc: linux-scsi@vger.rutgers.edu, rjohanne@piper.hamline.edu
In-Reply-To: <199708042114.XAA00312@batman.ag1.mpi-sb.mpg.de>
> Unless you apply the scsi-idle patch (which is being used with varying
> success by different people, it works pretty well for me), you should
> not do this on a drive which gets accessed by Linux.
>
> Active termination on the device to be powered down could be a
> problem, probably some SCSI guru here can comment on that.
I'm not an SCSI guru but from my experience:
AFAIK, this command will only spin down the drive but should not affect
the SCSI interface (and the termination), which remains powered waiting
for the on command (otherwise it would be pretty useless). Anyway, it
should cut down quite significantly on power dissipation (more than 2/3).
Gabriel.
