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This page contains the results of testing a tape drive with the
Bacula tool btape.
# /usr/local/sbin/btape -c /usr/local/etc/bacula-sd.conf /dev/nrsa1
Tape block granularity is 1024 bytes.
btape: butil.c:149 Using device: /dev/nrsa1 for writing.
*test
=== Append files test ===
This test is essential to Bacula.
I'm going to write one record in file 0,
two records in file 1,
and three records in file 2
btape: btape.c:380 Rewound /dev/nrsa1
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:380 Rewound /dev/nrsa1
btape: btape.c:685 Now moving to end of medium.
btape: btape.c:420 Moved to end of medium.
We should be in file 3. I am at file -1. This is NOT correct!!!!
Append test failed. Attempting again.
Setting "Hardware End of Medium = no" and retrying append test.
=== Append files test ===
This test is essential to Bacula.
I'm going to write one record in file 0,
two records in file 1,
and three records in file 2
btape: btape.c:380 Rewound /dev/nrsa1
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:380 Rewound /dev/nrsa1
btape: btape.c:685 Now moving to end of medium.
btape: btape.c:420 Moved to end of medium.
We should be in file 3. I am at file 3. This is correct!
Now the important part, I am going to attempt to append to the tape.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:380 Rewound /dev/nrsa1
Done appending, there should be no I/O errors
Doing Bacula scan of blocks:
1 block of 64448 bytes in file 1
End of File mark.
2 blocks of 64448 bytes in file 2
End of File mark.
3 blocks of 64448 bytes in file 3
End of File mark.
Total files=3, blocks=6, bytes = 386,688
End scanning the tape.
We should be in file 4. I am at file 3. This is NOT correct!!!!
It looks like the append failed. Attempting again.
Setting "BSF at EOM = yes" and retrying append test.
=== Append files test ===
This test is essential to Bacula.
I'm going to write one record in file 0,
two records in file 1,
and three records in file 2
btape: btape.c:380 Rewound /dev/nrsa1
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:380 Rewound /dev/nrsa1
btape: btape.c:685 Now moving to end of medium.
btape: btape.c:420 Moved to end of medium.
We should be in file 3. I am at file 3. This is correct!
Now the important part, I am going to attempt to append to the tape.
btape: btape.c:845 Wrote one record of 64412 bytes.
btape: btape.c:847 Wrote block to device.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:380 Rewound /dev/nrsa1
Done appending, there should be no I/O errors
Doing Bacula scan of blocks:
1 block of 64448 bytes in file 1
End of File mark.
2 blocks of 64448 bytes in file 2
End of File mark.
3 blocks of 64448 bytes in file 3
End of File mark.
1 block of 64448 bytes in file 4
End of File mark.
Total files=4, blocks=7, bytes = 451,136
End scanning the tape.
We should be in file 4. I am at file 4. This is correct!
It looks like the test worked this time, please add:
Hardware End of Medium = No
BSF at EOM = yes
to your Device resource in the Storage conf file.
The above Bacula scan should have output identical to what follows.
Please double check it ...
=== Sample correct output ===
1 block of 64448 bytes in file 1
End of File mark.
2 blocks of 64448 bytes in file 2
End of File mark.
3 blocks of 64448 bytes in file 3
End of File mark.
1 block of 64448 bytes in file 4
End of File mark.
Total files=4, blocks=7, bytes = 451136
=== End sample correct output ===
If the above scan output is not identical to the
sample output, you MUST correct the problem
or Bacula will not be able to write multiple Jobs to
the tape.
=== Write, backup, and re-read test ===
I'm going to write three records and two eof's
then backup over the eof's and re-read the last record.
Bacula does this after writing the last block on the
tape to verify that the block was written correctly.
It is not an *essential* feature ...
btape: btape.c:380 Rewound /dev/nrsa1
btape: btape.c:587 Wrote first record of 64412 bytes.
btape: btape.c:598 Wrote second record of 64412 bytes.
btape: btape.c:609 Wrote third record of 64412 bytes.
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:403 Wrote EOF to /dev/nrsa1
btape: btape.c:621 Backspaced over two EOFs OK.
btape: btape.c:626 Backspace record OK.
btape: btape.c:642
Block re-read correct. Test succeeded!
=== End Write, backup, and re-read test ===
=== End Append files test ===
*
The good news is no problems. The bad news, if you can call it that, is
btape has made some suggestions for improvement. I altered my storage
device to include the following:
Hardware End of Medium = No
BSF at EOM = yes
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