Re: [Bacula-users] Bacula btape multivolume fill test help requested

Hello,

I suggest you go back to the default tape configuration.  Then
make sure you are using the Linux st kernel driver and not the
kernel driver that IBM supplies.  The IBM driver is not compatible
with Bacula.

If that does not solve your problems, either others on this list
can help you, or you will need professional help.

Best regards,
Kern

On 08/03/2016 09:24 PM, Peter Szaban wrote:
> Hello,
>
>      I'm having trouble installing bacula 7.4.3 on a SuSE LEAP 42.1
> 64 bit system with kernel 4.1.26-21-default on an LTO6 tape
> library.
>
>      Btape's "test" and "autochanger" tests successful, but the multi-volume
> "fill" test is failing.  I was hoping some kind person could make some
> suggestions about how to fix this.
>
>      I interpret btape to be  saying it is having trouble re-reading the
> last block it wrote to a tape after loading a tape.  Maybe it's having
> trouble positioning to the correct spot on the tape.
>
>      I decided this isn't an issue with the physical end of tape, because
> I tried setting "Maximum Volume Size = 10G" (which makes the fill test
> run a lot faster,) and encountered the exact same problem.
>
>      At one point, I also unsuccessfully tried using stinit to change tape
> drive properties with guidance from:
>
>      
> http://www.bacula.org/5.2.x-manuals/en/problems/problems/Testing_Your_Tape_Drive.html#SECTION00434000000000000000
>
> manufacturer=IBM model = "ULTRIUM-TD6" {
> scsi2logical=1
> sysv=0
> read-ahead=1
> buffering=1
> async-writes=1
> mode1 blocksize=0 compression=1 }
>
>
>      I google'd this problem and found that some people with FreeBSD
> fixed a similar problem by setting "BSF at EOM = yes".  That isn't my
> problem however, because When I set that option in bacula-sd.conf,
> btape's "test" fails.
>
>    Here's some output from mt on the tape drive:
>
> mt -f /dev/st0 status
> drive type = Generic SCSI-2 tape
> drive status = 1509949440
> sense key error = 0
> residue count = 0
> file number = 0
> block number = 0
> Tape block size 0 bytes. Density code 0x5a (unknown).
> Soft error count since last status=0
> General status bits on (41010000):
>   BOT ONLINE IM_REP_EN
>
>
>      Here's the output from btape fill:
> .
> .
> .
> Wrote block=9600000, file,blk=504,6280 VolBytes=2,516,582,137,856 rate=144.8 
> MB/s
> Wrote block=9605000, file,blk=504,11280 VolBytes=2,517,892,857,856 rate=144.8 
> MB/s
> 02-Aug 21:20 btape JobId 0: End of Volume "TestVolume1" at 504:14969 on 
> device "TAPE01" (/dev/nst0). Write of 262144 bytes got -1.
> 02-Aug 21:20 btape JobId 0: Re-read of last block succeeded.
> btape: btape.c:2712-0 Last block at: 504:14968 this_dev_block_num=14969
> btape: btape.c:2747-0 End of tape 504:0. Volume Bytes=2,518,859,907,072. 
> Write rate = 144.7 MB/s
> 02-Aug 21:20 btape JobId 0: End of medium on Volume "TestVolume1" 
> Bytes=2,518,859,907,072 Blocks=9,608,688 at 02-Aug-2016 21:20.
> 02-Aug 21:20 btape JobId 0: 3307 Issuing autochanger "unload slot 1, drive 0" 
> command for vol TestVolume1.
> 02-Aug 21:22 btape JobId 0: 3304 Issuing autochanger "load slot 2, drive 0" 
> command for vol TestVolume2.
> 02-Aug 21:23 btape JobId 0: 3305 Autochanger "load slot 2, drive 0", status 
> is OK for vol TestVolume2.
> Wrote Volume label for volume "TestVolume2".
> 02-Aug 21:24 btape JobId 0: Wrote label to prelabeled Volume "TestVolume2" on 
> tape device "TAPE01" (/dev/nst0)
> 02-Aug 21:24 btape JobId 0: New volume "TestVolume2" mounted on device 
> "TAPE01" (/dev/nst0) at 02-Aug-2016 21:24.
> btape: btape.c:2315-0 Wrote 1000 blocks on second tape. Done.
> Done writing 0 records ...
> Wrote End of Session label.
> btape: btape.c:2384-0 Wrote state file last_block_num1=14968 
> last_block_num2=1001
> btape: btape.c:2402-0
>
> 21:24:11 Done filling tapes at 0:1003. Now beginning re-read of first tape ...
> btape: btape.c:2480-0 Enter do_unfill
> 02-Aug 21:24 btape JobId 0: 3307 Issuing autochanger "unload slot 2, drive 0" 
> command for vol TestVolume1.
> 02-Aug 21:25 btape JobId 0: 3304 Issuing autochanger "load slot 1, drive 0" 
> command for vol TestVolume1.
> 02-Aug 21:26 btape JobId 0: 3305 Autochanger "load slot 1, drive 0", status 
> is OK for vol TestVolume1.
> 02-Aug 21:26 btape JobId 0: Ready to read from volume "TestVolume1" on tape 
> device "TAPE01" (/dev/nst0).
> Rewinding.
> Reading the first 10000 records from 0:0.
> 10000 records read now at 1:1251
> Reposition from 1:1251 to 504:14968
> Reading block 14968.
>
>
> The blocks differ at byte 0
>
>
> !!!! The last block written and the block
> that was read back differ. The test FAILED !!!!
> This must be corrected before you use Bacula
> to write multi-tape Volumes.!!!!
> 02-Aug 21:28 btape JobId 0: 3307 Issuing autochanger "unload slot 1, drive 0" 
> command for vol TestVolume2.
> 02-Aug 21:30 btape JobId 0: 3304 Issuing autochanger "load slot 2, drive 0" 
> command for vol TestVolume2.
> 02-Aug 21:31 btape JobId 0: 3305 Autochanger "load slot 2, drive 0", status 
> is OK for vol TestVolume2.
> 02-Aug 21:31 btape JobId 0: Ready to read from volume "TestVolume2" on tape 
> device "TAPE01" (/dev/nst0).
> Reposition from 0:0 to 0:1
> Reading block 1.
>
> The first block on the second tape matches.
>
> Reposition from 0:2 to 0:1001
> Reading block 1001.
>
> The blocks differ at byte 0
>
>
> !!!! The last block written and the block
> that was read back differ. The test FAILED !!!!
> This must be corrected before you use Bacula
> to write multi-tape Volumes.!!!!
> btape: btape.c:2407-0 do_unfill failed.
>
>      Here's the pertinent parts of bacula-sd.conf:
>
> Device {
>    Name = TAPE01
>    Media Type = LTO
>    Archive Device = /dev/nst0
>    AutomaticMount = yes;               # when device opened, read it
>    AlwaysOpen = yes;
>    RemovableMedia = yes;
>    RandomAccess = no;
> #  Maximum Volume Size = 10G
> #  Maximum File Size = 5GB
> #  Maximum Block Size = 262144
> ## Changer Command = "/usr/local/bacula-7.4.3/etc/mtx-changer %c %o %S %a %d"
> # Changer Device = /dev/sg4
>   AutoChanger = yes
>   DriveIndex = 0
>    # Enable the Alert command only if you have the mtx package loaded
> # Alert Command = "sh -c '/usr/local/bacula/sbin/tapeinfo -f %c |grep 
> TapeAlert|
> cat'"
> # If you have smartctl, enable this, it has more info than tapeinfo
> Alert Command = "sh -c '/usr/sbin/smartctl -H -l error %c'"
> }
> Device {
>    Name = TAPE02
>    Media Type = LTO
>    Archive Device = /dev/nst1
>    AutomaticMount = yes;               # when device opened, read it
>    AlwaysOpen = yes;
>    RemovableMedia = yes;
>    RandomAccess = no;
> #  Maximum Volume Size = 10G
> #  Maximum File Size = 5GB
> #  Maximum Block Size = 262144
> ## Changer Command = "/usr/local/bacula-7.4.3/etc/mtx-changer %c %o %S %a %d"
> # Changer Device = /dev/sg4
>   AutoChanger = yes
>   DriveIndex = 1
>    # Enable the Alert command only if you have the mtx package loaded
> # Alert Command = "sh -c '/usr/local/bacula/sbin/tapeinfo -f %c |grep 
> TapeAlert|
> cat'"
> # If you have smartctl, enable this, it has more info than tapeinfo
>   Alert Command = "sh -c '/usr/sbin/smartctl -H -l error %c'"
> }
>
> Autochanger {
>    Name = tl5
>    Device = TAPE01
>    Device = TAPE02
>    Changer Command = "/usr/local/bacula-7.4.3/etc/mtx-changer %c %o %S %a %d"
>    Changer Device = /dev/sg4
> }
>
>      I'm running out of ideas here.  Any assistance would be appreciated.
>


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