2012/10/17 Stephen Thompson <step...@seismo.berkeley.edu>:
>
>
>
>
> 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
> step...@seismo.berkeley.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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Thanks guys
These are my results:
smartctl version 5.36 [x86_64-redhat-linux-gnu] Copyright (C) 2002-6 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
Device: IBM HH LTO Gen 3 Version: 76B0
Serial number: 1020024392
Device type: tape
Transport protocol: SAS
Local Time is: Thu Oct 18 09:34:18 2012 ART
Temperature Warning Disabled or Not Supported
TapeAlert Supported
TapeAlert: OK
Error counter log:
Errors Corrected by Total Correction
Gigabytes Total
ECC rereadDataCompEnableds/ errors
algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9
bytes] errors
read: 0 0 0 0 0
0.000 0
write: 0 0 0 0 0
0.000 0
Non-medium error count: 0
Device does not support Self Test logging
[root@superback ~]# mt -f /dev/nst0 compression 1
[root@superback ~]# tapeinfo -f /dev/sg0
Product Type: Disk Drive
Vendor ID: 'ServeRA '
Product ID: 'Supernoc Mirror '
Revision: 'V1.0'
Attached Changer: No
SerialNumber: '69D6045F'
SCSI ID: 0
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: Not Loaded
Density Code: 0x36
BlockSize: 3421510
DataCompEnabled: no
DataCompCapable: yes
DataDeCompEnabled: no
CompType: 0x30343546
DeCompType: 0x300000
Is "DataCompEnabled: no" correct even after running " mt -f /dev/nst0
compression 1" ?
Thanks in advance
--
--
Sergio Belkin http://www.sergiobelkin.com
Watch More TV http://sebelk.blogspot.com
LPIC-2 Certified - http://www.lpi.org
------------------------------------------------------------------------------
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