I'd been eagerly awaiting 1.38, as well as eagerly awaiting a much better
tape drive, now I have both, which made me very excited (both the new
features in 1.38 and the LTO2 drive that is replacing my DDS4 are
_extremely_ cool), but see a different and undesirable behavior with 1.38
(even on my old tape drive).
A little background:
My server runs headless downstairs in the garage, I usually get to the
bacula console from my desktop machine upstairs, and I don't have an
autoloader. Consequently, it is much more convenient if bacula spits out
the tape that it doesn't want (if it is full, or I forgot to change it),
and waits for me to insert the correct tape. Previously, in 1.36.?, with
my config (below), bacula would patiently wait a long, long time for me to
get around to giving it the tape it wanted. When I gave it the tape it
wanted, it would automatically mount and start using it. Now, it looks
like it is only willing to wait about 25 minutes before giving up, and if
the drive is unloaded, all subsequent jobs (requiring the same device)
fail 20 or so minutes after they start too.
My guess is that there is now a limit on the number of times bacula will
poll the device waiting for the new tape, and since I've set a pretty
short poll interval (1 minute), it gives up too easily.
Actually, I believe this was a problem in an earlier release, which Kern
fixed when I saw it, but it was fixed in the 1.36 build I was using (which
I hope wasn't my own local customization).
At any rate, anyone who wants to operate their drive in the way I do will
hit this problem if they are not quick in putting in the correct tape,
unless there is a config file option to control the number of polls of
which I am not aware (I did look in the manual section for the device
configuration and didn't see anything). If there is another way to
accomplish what I want, or even something close to what I want, I'd like
to hear about it.
-se
Here's the relevant clip from my bacula-sd.conf:
Device {
Name = DDS4
Media Type = DDS-4
Archive Device = /dev/nst1
Automatic Mount = Yes # when device opened, read it
Always Open = Yes
Volume Poll Interval = 1 min
Close On Poll = Yes
Offline On Unmount = Yes
Removable Media = Yes
Random Access = No
Maximum Spool Size = 10737418240
Spool Directory = /backup/bacula/spool
Alert Command = "sh -c 'tapeinfo -f %c |grep TapeAlert|cat'"
Maximum Network Buffer Size = 262144
}
--
-se
Steve Ellis
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