Hello,
On 3/2/2006 2:03 PM, Thomas Franz wrote:
Hello,
I am very new to bacula. My question : Is it possible (e.g. with bconsole) to
seek the "append position" of a tape after rewinding the tape because of
a restore etc.
No. The only way to position to EOD is by starting a job which uses the
volume.
In the case of a backup run it takes a long time ( up to hours ) until the
storage daemon is finding the end-of-data position . ( Of course only
if the tape is nearly full).
Well, any other repositioning command Bacula could implement would
probably use the same methods, so would be exactly as fast or slow as
what you observe.
We are using bacula 1.36.3 on a FreeBSD 4.11 machine.
The backup hardware is an EXABYTE Changer with an IBM LTO-3 drive.
It seems to work well after testing with btape and using the following
parameters:
...
Hardware End of Medium = no
BSF at EOM = yes
Backward Space Record = no
Fast Forward Space File = no
This setting might influence the positioning time a lot. Have you tried
running btape with this set to on?
TWO EOF = yes
....
Thanks.
The problem is that Bacula - or any other serious and
hardware-independent tape solution can't rely on the relatively fast
command to move to the EOD because it's not always possible to determine
the correct tape position then. The tape position (in terms of file mark
number) is needed to make sure the tape is correctly represented in the
catalog.
Arno
Thomas
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