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