I recently replaced some drives on my omv server and decided to format the drives as single unit btrfs (this isn't a thread debate about format choices). My system is usually powered down but is woken up (wol) from another server to allow use as a backup destination. The following the completion of the backup on the other server the autoshutdown turns off the omv server.
I've noticed that the omv server wasn't powering down as it used to pre btrfs drives and after investigation found that a scrub was being performed on the btrfs drives. Syslog entries suggest that the btrfs drives are being scrubbed as a result of them being mounted at power up, but not 100% sure.
I've looked at various cron entries and can only find a weekly and monthly entry for scheduled scrubs.
I've found in fstab an option to force a scub of btrfs on mount but this doesn't appear in my fstab.
I've no issue with the scrub as such but instead of my omv server being powered on for typically an hour or so during a backup from my primary system it's now powered up for over 12 hours as it sequentially scrubs three btrfs formatted dives.
I've got a second omv server that also has some btrfs formatted drives but is doesn't appear to initiate a scrub at power up. However they have been powered up at different times, omv running scrub ~midnight powerup, second non-auto-scrub (so far) powered up ~11:40. So a bit inconclusive.
Has anyone else noticed anything similar regarding scrub initialisation?