Subject: [Bacula-users] About tapes capacity



Hi people:

I'm running Bacula 5.0.3 with an tape library IBM TS3100 using LTO5
tapes of 1.5 TB capacity each one. I have a simple question: If I run
a job backup of a server that holds more than 1.5 TB (example: 2 TB of
data), what happen when Bacula reaches the limit of the tape capacity?
Does Bacula automatically change the tape?

I'm not pretty sure about this because I recently ran a job backup of
2 TB and Bacula apparently just used one tape: have a look at my
volume listing:

* list volume
...
...
| 5 | L5BA0005 | Append | 1 | 2,058,019,117,056 |
2,059 | 2,160,000 | 1 | 5 | 1 | LTO-5 |
2011-04-19 20:58:51 |
+---------+------------+-----------+---------+-------------------+----------+--------------+---------+------+-----------+-----------+---------------------+

When the job started Bacula took the tape L5BA0005 and never required
another one. As you can see Bacula apparently wrote 2,058,019,117,056
bytes (approx. 2 TB) but my tape is just 1.5 TB capacity. Does anybody
know why? My job isn't using compression so I really don't understand
this.
Just for additional information there are a lot of new tapes on my
magazines. Have a look at this:

* list volume
Pool: Scratch
+---------+------------+-----------+---------+----------+----------+--------------+---------+------+-----------+-----------+---------------------+
| MediaId | VolumeName | VolStatus | Enabled | VolBytes | VolFiles |
VolRetention | Recycle | Slot | InChanger | MediaType | LastWritten
|
+---------+------------+-----------+---------+----------+----------+--------------+---------+------+-----------+-----------+---------------------+
| 6 | L5BA0006 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 6 | 1 | LTO-5 | 0000-00-00
00:00:00 |
| 7 | L5BA0007 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 7 | 1 | LTO-5 | 0000-00-00
00:00:00 |
| 8 | L5BA0008 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 8 | 1 | LTO-5 | 0000-00-00
00:00:00 |
| 12 | L5BA0001 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 13 | L5BA0009 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 9 | 1 | LTO-5 | 0000-00-00
00:00:00 |
| 14 | L5BA0010 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 15 | L5BA0011 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 16 | L5BA0012 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 17 | L5BA0013 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 18 | L5BA0014 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 19 | L5BA0015 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 20 | L5BA0016 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 21 | L5BA0017 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 22 | L5BA0018 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 23 | L5BA0019 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
| 24 | L5BA0020 | Append | 1 | 64,512 | 0 |
31,536,000 | 1 | 0 | 0 | LTO-5 | 0000-00-00
00:00:00 |
+---------+------------+-----------+---------+----------+----------+--------------+---------+------+-----------+-----------+---------------------+

So I don't know why Bacula didn't take a free tape of Scratch pool. I
hope someone can help me to understand this Bacula behavior.

Thanks, bye.

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