[mythtv-users] Spinning down drives to save power

Rick Hudson rick at kpo.org.nz
Sun Jun 22 22:28:41 UTC 2008

On 22/06/2008 11:56 p.m., Jan Ceuleers wrote:

> Rick Hudson wrote:
>> I seem to recall that on recent versions of Linux, hdparm -S doesn't even work 
>> on ATA drives because of the change in control path. e.g. on my Ubuntu 8.04 
>> backend the media drive is an ATAPI drive but Ubuntu sees it as /dev/sda and 
>> must be controlled using the SCSI interface.
> For what it's worth, my SATA drives are also seen as /dev/sd[a-f] and 
> can be controlled using hdparm. Specifically, hdparm -S does indeed 
> work. That's on stock Ubuntu 7.10, which uses a kernel derived from 2.6.22.

You're right - hdparm -S /dev/sdx does work if the drive is PATA but not if 
it's a USB drive. In fact when I look at the start-up scripts for my myth box 
it does indeed use hdparm to set the drive shutdown down.

Sorry for the mis-information!

Rick Hudson
http://www.kpo.org.nz/                                        rick at kpo.org.nz

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