> Message: 3
> Date: Thu, 30 Apr 2009 16:47:46 +0200
> From: yvan <yvan AT skywalker.is-a-chef DOT com>
> Subject: [Bacula-users] Tape MTEOM error with Dell TL2000 (IBM TS3100)
> To: bacula-users AT lists.sourceforge DOT net
> Message-ID: <49F9BA12.2070709 AT skywalker.is-a-chef DOT com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi the list !
>
> I need your help !
> I'm trying to setup bacula working with our Dell Autochanger TL2000 (24
> slots, 1 drive), and I have pretty serious problems that drive me mad. I
> can't tell the many hours I spent on that project.
>
> The issue is that bacula has trouble appending to tape if it has already
> written a few Gb on it, but when I test the drive and auto-changer with
> "btape" all works like a charm. I tried many of the device resource
> parameters, with no luck.
>
> System: Debian 5.0 Lenny for x64 arch, Bacula 2.4.4 (official debian 5
> packages), Postgres db 8.3.7,
> running on Dell Poweredge 2950 with 8Gb Ram, Raid disks
> Tape system : Dell TL2000 (which is a re-branded IBM TS3100) autochanger
> with 24 slots and 1 drive. Tapes are LTO4. Changer device is /dev/sg3,
> tape device is /dev/nst0. Connected through external SAS.
>
> The error I get is that :
> 01-Apr 10:40 setmseblx0007-sd JobId 89: Volume "000003" previously
> written, moving to end of data.
> 01-Apr 10:40 setmseblx0007-sd JobId 89: Error: Unable to position to end
> of data on device "IBMLTO4" (/dev/nst0): ERR=dev.c:895 ioctl MTEOM error
> on "IBMLTO4" (/dev/nst0). ERR=Input/output error.
> 01-Apr 10:40 setmseblx0007-sd JobId 89: Marking Volume "000003" in Error
> in Catalog.
> 01-Apr 10:40 setmseblx0007-sd JobId 89: 3307 Issuing auto-changer
> "unload slot 3, drive 0" command.
>
> Autochanger is working without problem, (mtx-changer script slightly
> adapted to my needs). I have a bunch of 16 brand new tapes LTO4 to play
> with. Firmware of both tape drive and autoloader have been updated to
> the latest.
>
> I tried using btape on my tapes, and btape reports that everything is
> fine. Then if I backup a few hundreds Gbytes on the tape and try to
> append on it, this error happens. If I try to run small jobs, everything
> is fine and then bacula can append on the tape. I need to write around
> 60Gb on tape to have that.
>
>
> Here is my storage configuration file :
>
> Device {
> Name = IBMLTO4
> Media Type = LTO4
> Device Type = tape
> Archive Device = /dev/nst0
> Autochanger = yes
> #Changer Device = /dev/sg3
> #Alert Command = "sh -c 'tapeinfo -f %c | grep -i tapealert'"
> LabelMedia = yes;
> ###
> #Label Type = IBM | ANSI | Bacula
> #Label Type = IBM # ca m'enerve
> Check Labels = yes
> ###
> Random Access = No;
> AutomaticMount = yes; # when device opened, read it
> RemovableMedia = yes;
> AlwaysOpen = yes
>
> # things to try:
> #TWO EOF = yes # tried but append test fails. default is No
> #Offline On Unmount = no # default is No
> Hardware End of Medium = no # default is Yes
> #BSF at EOM = yes # default is No
> #Backward Space Record = no # default is Yes for
> tape device
> #Backward Space File = no #
> # Use MTIOCGET = Yes # only need to no on
> some ***BSD systems
> #Fast Forward Space File = no # tried, not better, got
> MTFSF error
> }
>
> Autochanger {
> Name = TL2000
> Device = IBMLTO4
> Changer Command = "/etc/bacula/scripts/mtx-changer %c %o %S %a %d"
> Changer Device = /dev/sg3 # already set in the device resource. both
> are possibles
> }
>
> As you can see, I played a bit with the storage parameters, tried
> Hardware End of medium = No, Fast Forward Space File = No (which raises
> another error), TWO EOF (btape complains that he's not on the right
> file), but nothing changes. I always get that MTEOM error.
>
> Any idea ?
>
> Yvan Broccard, Switzerland
>
I also had very similar problems when I first started testing Bacula. Now,
I have both TS3100 & TS3200 models running without any issues on
RedHat 4 and 5 servers. My configurations are:
Autochanger {
Name = TS3200_1_DRV1
Device = LTO4_1
Changer Device = /dev/sg7 # This is mapped to the AutoLoader
Changer Command = "/etc/bacula/config/mtx-changer %c %o %S %a %d"
}
Device {
Name = LTO4_1
Drive Index = 0
Media Type = LTO4
Archive Device = /dev/nst0 # Device nstX created
automatically by st daemon.
AutoChanger = yes
AutomaticMount = yes; # when device opened, read it
AlwaysOpen = yes; # Default value yes
RemovableMedia = yes;
RandomAccess = no;
Requires Mount = no;
Maximum Open Wait = 300 # Default value
Maximum Rewind Wait = 300 # Default value
Maximum Changer Wait = 120 # default is 120 secs
Maximum Job Spool Size = 2G # default is unlimited
Spool Directory = "/export/shared/spool"
Label Type = IBM
Check Labels = yes
LabelMedia = no;
Hardware End of Medium = No # defaut is Yes
Fast Forward Space File = No # This line required if above
HEOM is set to "No"
BSF at EOM = no # Default is no
Two EOF = no
Volume Poll Interval = 300 # Poll the drive to seek the status
}
I also changed the LTO4 tape drives' parameters with the "mt" command.
1. mt -f /dev/st0 stsetoptions
2. mt -f /dev/st0 compression
3. mt -f /dev/st0 stsetoptions buffer-writes
4. mt -f /dev/st0 stsetoptions async-write
5. mt -f /dev/st0 stsetoptions fast-eod
6. mt -f /dev/st0 stsetoptions two-fms
7. tapeinfo -f /dev/sg2
Product Type: Tape Drive
Vendor ID: 'IBM '
Product ID: 'ULT3580-TD4 '
Revision: '77B1'
Attached Changer: No
SerialNumber: '1310016341'
MinBlock:1
MaxBlock:16777215
SCSI ID: 2
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: 0x48
Density Code: 0x46
BlockSize: 0
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
CompType: 0x1
DeCompType: 0x1
Block Position: 7920778
HTH
Cheers,
Win
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