On Wed, 2007-12-12 at 21:35 -0600, David Dyer-Bennet wrote:
> What are the approaches to finding what external USB disks are currently
> connected?
Would "rmformat -l" or "eject -l" fit the bill ?
> The external USB backup disks in question have ZFS filesystems on them,
> which may make a difference in finding them perhaps?
Nice.
I dug around a bit with this a while back, and I'm not sure hal &
friends are doing the right thing with zpools on removable devices just
yet. I'd expect that we'd have a "zpool import" triggered on a device
being plugged, analogous to the way we have pcfs disks automatically
mounted by the system. Indeed there's
/usr/lib/hal/hal-storage-zpool-export
/usr/lib/hal/hal-storage-zpool-import and
/etc/hal/fdi/policy/10osvendor/20-zfs-methods.fdi
but I haven't seen them actually doing anything useful when I insert a
disk with a pool on it. Does anyone know whether these should be working
now ? I'm not a hal expert...
> I've glanced at Tim Foster's autobackup and related scripts, and they're
> all about being triggered by the plug connection being made; which is
> not what I need.
Yep, fair enough.
> I don't actually want to start the big backup when I
> plug in (or power on) the drive in the evening, it's supposed to wait
> until late (to avoid competition with users). (His autosnapshot script
> may be just what I need for that part, though.)
The zfs-auto-snapshot service can perform a backup using a command set
in the "zfs/backup-save-cmd" property.
Setting that be a script that automagically selects a USB device (from a
known list, or one with free space?) and points the stream at a relevant
"zfs recv" command to the pool provided by your backup device might be
just what you're after.
Perhaps this is a project for the Christmas holidays :-)
cheers,
tim
--
Tim Foster, Sun Microsystems Inc, Solaris Engineering Ops
http://blogs.sun.com/timf
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