Re: [Bacula-users] mtx and mtx-changer not functioning

Richard Couture Fri, 11 Jan 2019 16:23:46 -0800

Here is my lsscsi -g

I use sg3 to talk to the magazine mech and st0 or nst0 to talk to the drive


I don't have a /dev/changer as many seem to have

In /dev/tape I have

[root@LTOMag ~]# ls -al /dev/tape/by-id/
total 0
drwxr-xr-x 2 root root 100 Jan  9 21:06 ./
drwxr-xr-x 4 root root  80 Jan  9 21:06 ../

lrwxrwxrwx 1 root root 9 Jan 9 21:06 scsi-1QUANTUM_F5C1834008_LLA ->../../sg3

lrwxrwxrwx 1 root root   9 Jan  9 21:06 scsi-3500308c3ec11e004 -> ../../st0

lrwxrwxrwx 1 root root 10 Jan 9 21:06 scsi-3500308c3ec11e004-nst ->../../nst0

[root@LTOMag ~]# ls -al /dev/tape/by-path
total 0
drwxr-xr-x 2 root root 80 Jan  9 21:06 ./
drwxr-xr-x 4 root root 80 Jan  9 21:06 ../

lrwxrwxrwx 1 root root 9 Jan 9 21:06 pci-0000:01:00.0-sas-phy3-lun-0-> ../../st0lrwxrwxrwx 1 root root 10 Jan 9 21:06pci-0000:01:00.0-sas-phy3-lun-0-nst -> ../../nst0


I made a symlink from changer to sg3, without any effect

Richard


[root@LTOMag ~]# lsscsi -g
[0:0:0:0]    disk    ATA      WDC WD10EZEX-75W 1A02  /dev/sda   /dev/sg0
[1:0:0:0]    disk    ATA      WD5003ABYX-23    WC38  /dev/sdb   /dev/sg1
[6:0:0:0]    tape    IBM      ULTRIUM-HH8      J4D1  /dev/st0   /dev/sg2
[6:0:0:1]    mediumx QUANTUM  Scalar i3-i6     160G  /dev/sch0  /dev/sg3


On 1/11/19 4:13 PM, Jeffrey R. Lang wrote:

In your mtx command output one thing I don't see is the Data Transfer Unit 
(i.e. tape drive) associated with the tape library.

For my tape library I get:

[root@bkupsvr3 ~]# mtx -f /dev/xchg0 status
   Storage Changer /dev/xchg0:4 Drives, 179 Slots ( 2 Import/Export )
Data Transfer Element 0:Full (Storage Element 162 Loaded):VolumeTag = 000162L5
Data Transfer Element 1:Full (Storage Element 120 Loaded):VolumeTag = 000120L5
Data Transfer Element 2:Full (Storage Element 105 Loaded):VolumeTag = 000105L5
Data Transfer Element 3:Full (Storage Element 166 Loaded):VolumeTag = 000166L5
       Storage Element 1:Full :VolumeTag=000001L5
       Storage Element 2:Full :VolumeTag=000002L5
       Storage Element 3:Full :VolumeTag=000003L5
       Storage Element 4:Full :VolumeTag=000004L5
       Storage Element 5:Full :VolumeTag=000005L5
       Storage Element 6:Full :VolumeTag=000006L5

So I wondering does the library either not show drives or is there an issue 
with the library seeing the tape drive.

I would investigate and make sure that the drive and library are connected 
properly.

The output of "lsscsi -g" does who the tape drive?



-----Original Message-----
From: Richard Couture <r...@linuxcabal.org>
Sent: Friday, January 11, 2019 1:59 PM
To: bacula-users@lists.sourceforge.net
Subject: Re: [Bacula-users] mtx and mtx-changer not functioning

How odd

[root@LTOMag ~]# mt -f /dev/st0 offline
[root@LTOMag ~]# mtx -f /dev/sg3 unload 1 0 Data Transfer Element 0 is Empty

Now says the tape drive is empty

HOWEVER

[root@LTOMag ~]# mtx -f /dev/sg3 status
    Storage Changer /dev/sg3:1 Drives, 30 Slots ( 5 Import/Export ) Data 
Transfer Element 0:Empty
        Storage Element 1:Empty:VolumeTag=
        Storage Element 2:Full :VolumeTag=000002L7
        Storage Element 3:Full :VolumeTag=000003L7
        Storage Element 4:Full :VolumeTag=000004L7
        Storage Element 5:Full :VolumeTag=000005L7
        Storage Element 6:Full :VolumeTag=000006L7
        Storage Element 7:Full :VolumeTag=000007L7
        Storage Element 8:Full :VolumeTag=000008L7
        Storage Element 9:Full :VolumeTag=000009L7
        Storage Element 10:Full :VolumeTag=000010L7
        Storage Element 11:Full :VolumeTag=000011L7
        Storage Element 12:Full :VolumeTag=000012L7
        Storage Element 13:Full :VolumeTag=000013L7
        Storage Element 14:Full :VolumeTag=000014L7
        Storage Element 15:Full :VolumeTag=000015L7
        Storage Element 16:Full :VolumeTag=000016L7
        Storage Element 17:Full :VolumeTag=000017L7
        Storage Element 18:Full :VolumeTag=000018L7
        Storage Element 19:Full :VolumeTag=000019L7
        Storage Element 20:Full :VolumeTag=000020L7
        Storage Element 21:Full :VolumeTag=000021L7
        Storage Element 22:Full :VolumeTag=000022L7
        Storage Element 23:Full :VolumeTag=000023L7
        Storage Element 24:Full :VolumeTag=000024L7
        Storage Element 25:Full :VolumeTag=000025L7
        Storage Element 26 IMPORT/EXPORT:Full :VolumeTag=CLN005CU

        Storage Element 27 IMPORT/EXPORT:Full :VolumeTag=CLN004CU

        Storage Element 28 IMPORT/EXPORT:Full :VolumeTag=CLN003CU

        Storage Element 29 IMPORT/EXPORT:Full :VolumeTag=CLN002CU

        Storage Element 30 IMPORT/EXPORT:Empty:VolumeTag=


syas that the tape was not returned to slot 1

and just for fun

[root@LTOMag ~]# mtx -f /dev/sg3 unload
Data Transfer Element 0 is Empty
[root@LTOMag ~]# mtx -f /dev/sg3 next
Loading media from Storage Element 2 into drive 0...mtx: Request Sense:
Long Report=yes
mtx: Request Sense: Valid Residual=no
mtx: Request Sense: Error Code=70 (Current)
mtx: Request Sense: Sense Key=Illegal Request
mtx: Request Sense: FileMark=no
mtx: Request Sense: EOM=no
mtx: Request Sense: ILI=no
mtx: Request Sense: Additional Sense Code = 21
mtx: Request Sense: Additional Sense Qualifier = 01
mtx: Request Sense: Field in Error = 07
mtx: Request Sense: BPV=yes
mtx: Request Sense: Error in CDB=yes
mtx: Request Sense: SKSV=yes
mtx: Request Sense: Field Pointer = 00 02 MOVE MEDIUM from Element Address 4097 
to 256 Failed

And physically checking; No tape in Slot 1, it remains in the drive



Richard


On 1/11/19 1:01 PM, Jeffrey R. Lang wrote:

I have run into tape libraries that require the tape to be unloaded from the 
drive before performing an unload command.

The mtx-changer script supports  this feature.  You need to change the
.../etc/mtx-changer.conf file, specifically the line

# Set to 1 if you want to do offline before unload
offline=0

In the example from below

mtx -f /dev/sg3 load 1 0
mtx -f /dev/sg3 unload 1 0

add a command to unload the tape from the drive between the two lines

mt  -f <tape device> offline

-----Original Message-----
From: Sebastian Suchanek <bac...@suchanek.de>
Sent: Friday, January 11, 2019 12:53 PM
To: bacula-users@lists.sourceforge.net
Subject: Re: [Bacula-users] mtx and mtx-changer not functioning

◆ This message was sent from a non-UWYO address. Please exercise caution when 
clicking links or opening attachments from external sources.


Am 11.01.2019 um 14:49 schrieb Richard Couture:

Does mtx work when you explicitly specify the slots? I.e.:

mtx -f /dev/sg3 load 1 0
mtx -f /dev/sg3 unload 1 0

No


Then, in my opinion, the problem is somewhere outside of Bacula.
My best guess is that either your library and your version of mtx are 
incompatible or your library is broken (e.g. faulty firmware).


Best regards

Sebastian



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LinuxCabal Asociación Civil
Ing. Richard Couture
Novell CNE, ECNE, MCNE
HP/Compaq ASE
Tel.: (+52) (333) 145-2638
Cel.: (+52) (044) 333 377-7505
Web: http://www.LinuxCabal.org
E-Mail: r...@linuxcabal.org
Hosted en la nube Cloud Sigma - www.CloudSigma.com

AVISO DE CONFIDENCIALIDAD: Este correo electrónico, incluyendo en sucaso, los archivos adjuntos al mismo, pueden contener información decarácter confidencial y/o privilegiada, y se envían a la atención únicay exclusivamente de la persona y/o entidad a quien va dirigido. Lacopia, revisión, uso, revelación y/o distribución de dicha informaciónconfidencial sin la autorización por escrito de LinuxCabal estáprohibida. Si usted no es el destinatario a quien se dirige el presentecorreo, favor de contactar al remitente respondiendo al presente correoy eliminar el correo original incluyendo sus archivos, así comocualesquiera copia del mismo. Mediante la recepción del presente correousted reconoce y acepta que en caso de incumplimiento de su parte y/o desus representantes a los términos antes mencionados, LinuxCabal tendráderecho a los daños y perjuicios que esto le cause.




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