On Mon, 2020-06-08 at 23:25 -0400, Jon LaBadie wrote: > On Tue, Jun 02, 2020 at 10:57:10AM +0100, Patrick O'Callaghan wrote: > > I have a powered USB dock with a couple of SATA drives configured as > > RAID1, and used only for nightly backups. The (minimal) manual for the > > dock tells me it will power down after 30 minutes idle time, however I > > don't see this happening. I presume that something (such as the md > > system) is touching the drives periodically. > > > > What is the fstab option to have the drives mounted only when accessed? > > This used to be automount (or autofs) but with systemd getting its > > fingers into everything I know longer know how to do this. > > > > Can the drive be automatically unmounted if not in use? I presume this > > would stop md from trying to check it and hence prevent the dock from > > keeping it powered on. > > > I have an external 4 drive USB enclosure also for nightly backup. No > raid, JBOD. > > I use hdparm's -S option (sleep timeout) to set the drives own sleep > time. I think I use 10 or 20 min. The drives still look like they > are mounted, but their activity lights are all out during the day. > > If I do access one of them, say do a df, cd, or ls, they all wake up > but there is a delay of 10-20 seconds before my command completes. Thanks. I tested that and although the hdparm succeeded, the drives don't power down. I think this particular dock has its own ideas about idling the drives and won't do it as long as the interface is online. poc _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
