On Tue, 2020-12-01 at 14:52 +0100, Roberto Ragusa wrote:
> On 12/1/20 2:15 PM, Patrick O'Callaghan wrote:
> > I have a couple of SATA drives connected via a USB dock that I use only
> > for backups. Normally they are powered down and only come on at night
> > during the backup run. However they also power on any time I reboot the
> > system and have to be powered down again manually. I'd prefer not to
> > power them on at all until they're needed.
> >
> > Is there some magic that would inhibit the boot process from powering
> > up these devices? Note that the /etc/fstab entry already has 'noauto'
> > but that just prevents them from being mounted.
>
> How do you power them down?
Extract from my script ($SLOT is sd[de]):
smartctl --smart=off /dev/$SLOT1 -q errorsonly >> $LOG 2>&1
smartctl --smart=off /dev/$SLOT2 -q errorsonly >> $LOG 2>&1
echo 1 > /sys/block/$SLOT1/device/delete # Can't
use udisksctl because it removes the
echo 1 > /sys/block/$SLOT2/device/delete # bus,
which can't be powered on again
poc
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