I recently found out that I had a bad tape drive.

With the tape in the drive run the following and see if it says there 
are errors:

smartctl -a /dev/nst0


If there are errors, it's wasting tape and hence less capacity.

Stephen



On 10/17/2012 11:14 AM, Sergio Belkin wrote:
> Hi folks
>
> I'm using LTO3 tapes and are filling up too fast. They have supposedly
> 800 GB. I know that never reach that capacity, but I am somewhat
> surprised that is full with only ~ 333 GB!!  (lesser than a half)
>
>
> If I issue a "list media pool" command I get
>
> | MediaId | VolumeName   | VolStatus | Enabled | VolBytes        |
> VolFiles | VolRetention | Recycle | Slot | InChanger | MediaType |
> LastWritten         |
> +---------+--------------+-----------+---------+-----------------+----------+--------------+---------+------+-----------+-----------+---------------------+
> |     100 | LUNOCT12LTO3 | Full      |       1 | 421,590,177,792 |
>   431 |   31,536,000 |       0 |    0 |         0 | LTO3      |
> 2012-10-16 08:11:08 |
>
>
> Output of mt -f /dev/nst0  status
>
> SCSI 2 tape drive:
> File number=0, block number=0, partition=0.
> Tape block size 0 bytes. Density code 0x44 (no translation).
> Soft error count since last status=0
> General status bits on (41010000):
>   BOT ONLINE IM_REP_EN
>
> The volume was recycled with 'mt -f /dev/nst0 rewind;mt -f /dev/nst0 weof'
>
> My storage daemon config is as follow
>
> Storage {                             # definition of myself
>    Name = superbackup-sd
>    SDPort = 9103                  # Director's port
>    WorkingDirectory = "/var/bacula/working"
>    Pid Directory = "/var/run"
>    Maximum Concurrent Jobs = 20
>
> }
> Director {
>    Name = superbackup-dir
>    Password = "ucuc"
> }
> Director {
>    Name = superbackup-mon
>    Password = "ucuc"
>    Monitor = yes
> }
> Device {
>    Name = LTO3
>    Media Type = LTO3
>    Archive Device = /dev/nst0          #modificar a "1" para usar el DAT4S
>    AutomaticMount = yes;               # when device opened, read it
>    AlwaysOpen = yes;
>    RemovableMedia = yes;
>    Maximum Spool Size = 30g
>    Maximum Job Spool Size = 20gb
>    Spool Directory = /var/spool/bacula
>    #Maximum Network Buffer Size =  10240
>    #Hardware end of medium = No;
>    Fast Forward Space File = yes
>    #TWO EOF = yes
> }
>
> Messages {
>    Name = Standard
>    director = supernoc-dir = all
> }
> You have new mail in /var/spool/mail/root
>
>
> Could you suggest me something to improve it?
>
> Thanks in advance!
>


-- 
Stephen Thompson               Berkeley Seismological Laboratory
stephen AT seismo.berkeley DOT edu    215 McCone Hall # 4760
404.538.7077 (phone)           University of California, Berkeley
510.643.5811 (fax)             Berkeley, CA 94720-4760

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