Lamar Owen wrote:
I'm starting to build a box that will have an assortment of scsi and
sata disks, most, but not all paired in md raid1 devices and expect to
have a few hotplug sata and external USB and firewire drives that will
be connected periodically. Do you have any hints on how to write a
script that will copy things to the recently-mounted drive(s) and how to
avoid boot problems if any of them happen to be connected during a
reboot? Will the md devices always find/pair themselves regardless of
the underlying partition device names?
MD devices will find their mates by UUID. Drive order matters not to MD.
Hmmm, maybe I'll create even the non-mirrored partitions as raid1 with a
'missing' partition to keep things consistent then. That also has the
advantage of permitting easy conversion to mirrored or syncing with a
swappable device that can be removed as a backup.
The only place where drive order matters is where /boot lives, and that's set,
for PC hardware, in the GRUB configuration.
That will be on SCSI, and I think the system bios settings will take
care of that part.
Oh, in case your wondering what sort of hardware this is, here's the contents
of /proc/scsi/scsi: the clues you need to find out what kind of system this
is are in there. :-)
[root@spacely ~]# cat /proc/scsi/scsi
Host: scsi0 Channel: 00 Id: 03 Lun: 00
Vendor: SEAGATE Model: ST39103LCSUN9.0G Rev: 034A
^^^
[root@spacely ~]#
I have had more problems with drive order on PC hardware than I have had on
spacely.
But wouldn't you rather be running zfs on that?
--
Les Mikesell
lesmikesell@xxxxxxxxx
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