On Wed, Apr 20, 2011 at 9:22 AM, Paul Mather <paul AT gromit.dlib.vt DOT edu>
wrote:
> On Apr 20, 2011, at 10:17 AM, Jason Voorhees wrote:
>
>> 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.
>
>
> The job may not be using compression but the tape drive itself may have
> compression enabled, which could account for being able to write 2 TB to the
> LTO-5 tape.
>
> (The 1.5 TB capacity is the native capacity of an LTO-5 tape without hardware
> compression enabled.)
>
> Cheers,
>
> Paul.
>
>
Hi, excuse me if I'm a newbie on this but, how and where can I verify
if hardware compression is enabled? It would be on the web
administration of my tape library?
Thanks
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