26 Jul
2015
26 Jul
'15
12:52 a.m.
On Fri, 24 Jul 2015 at 21:07 James Harper <james@ejbdigital.com.au <mailto:james@ejbdigital.com.au> > wrote:
Are the disks in question spun up by the BIOS, or by Linux?
Not sure.
I would have assumed BIOS spins all the disks up it detects before starting grub.
I am not exactly keeping up with modern BIOS trends though (it is UEFI boot), so I could be wrong here. The disks containing the btrfs partitions are not used for booting, and are not used for / either.
I think it would spin up all the disks it knew about. If you had a SAS card or something with its own BIOS then things might be different. Also spinning up a disk is a pretty quick thing, and would only add a second or two to the mount time. James