Re: disable sleep mode hdd usb
On Tuesday 17 August 2010 10:52:40 Sven Joachim wrote:
> On 2010-08-17 20:26 +0200, Greg Madden wrote:
> > On Tuesday 17 August 2010 09:16:51 Markus wrote:
> >> Camaleón wrote:
> >> > On Tue, 17 Aug 2010 11:26:30 +0200, Tabano wrote:
> >> >> I want disable the sleep mode in my external hdd usb forever when
> >> >> start Debian.
> >> >
> >> > hdparm/sdparm may help.
> >> >
> >> > But some manufacturers disallow this management on the user side.
> >> >
> >> > Greetings,
> >>
> >> Put this line:
> >>
> >> hdparm -B 255 /dev/sdX
> >>
> >> in your /etc/rc.local file where X is the corresponding letter for your
> >> usb hdd.
> >> For getting this to work, your usb hdd has to be pluged in the usb-port
> >> during boot up.
> >> And you have to ensure that it always has the same "X".
> >
> > Does hdparm understand uuid's ?
>
> Probably not, but this could easily be worked around by using a symlink
> in /dev/disk/by-uuid. The only problem is that there may not be one for
> sdX; at least I don't have a symlink to /dev/sda in /dev/disk/by-uuid, ,
> only symlinks to /dev/sdaX, i.e. the partitions.
>
> > The original poster doesn't mention the verson of Debian, Squeeze uses
> > uuid's, and if you are using external usb devices, uuid's are a great
> > way to make sure the same file system gets mounted appropriately each
> > time.
>
> Maybe the disk name in /dev/disk/by-id could be used instead, there are
> symlinks to /dev/sda on my system.
>
> Sven
Well my mistake, hdparm deals with hard drives and uuid's are for file
systems/partitions. i haven't had much luck with usb/sata device naming
remaining the same without uuid's though. Seems like anything using sdX could
fail at some point.
--
Peace,
Greg
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