Using btape to Verify your Tape Drive

[root@um1ubackup bacula]# btape -c bacula-sd.conf /dev/st0
Tape block granularity is 1024 bytes.
btape: butil.c:286 Using device: "/dev/st0" for writing.
27-Jan 16:42 btape: 3301 Issuing autochanger "loaded? drive 0" command.
27-Jan 16:42 btape: 3302 Autochanger "loaded? drive 0", result is Slot 24.
27-Jan 16:42 btape: 3301 Issuing autochanger "loaded? drive 0" command.
27-Jan 16:42 btape: 3302 Autochanger "loaded? drive 0", result is Slot 24.
btape: btape.c:368 open device "LTO-3" (/dev/st0): OK
*

then type test

*test

=== Write, rewind, and re-read test ===

I'm going to write 1000 records and an EOF
then write 1000 records and an EOF, then rewind,
and re-read the data to verify that it is correct.

This is an *essential* feature ...

btape: btape.c:825 Wrote 1000 blocks of 64412 bytes.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:841 Wrote 1000 blocks of 64412 bytes.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:850 Rewind OK.
1000 blocks re-read correctly.
Got EOF on tape.
1000 blocks re-read correctly.
=== Test Succeeded. End Write, rewind, and re-read test ===


=== Write, rewind, and position test ===

I'm going to write 1000 records and an EOF
then write 1000 records and an EOF, then rewind,
and position to a few blocks and verify that it is correct.

This is an *essential* feature ...

btape: btape.c:937 Wrote 1000 blocks of 64412 bytes.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:953 Wrote 1000 blocks of 64412 bytes.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:962 Rewind OK.
Reposition to file:block 0:4
Block 5 re-read correctly.
Reposition to file:block 0:200
Block 201 re-read correctly.
Reposition to file:block 0:999
Block 1000 re-read correctly.
Reposition to file:block 1:0
Block 1001 re-read correctly.
Reposition to file:block 1:600
Block 1601 re-read correctly.
Reposition to file:block 1:999
Block 2000 re-read correctly.
=== Test Succeeded. End Write, rewind, and re-read 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:469 Rewound "LTO-3" (/dev/st0)
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
27-Jan 16:43 btape: 3301 Issuing autochanger "loaded? drive 0" command.
27-Jan 16:43 btape: 3302 Autochanger "loaded? drive 0", result is Slot 24.
btape: btape.c:368 open device "LTO-3" (/dev/st0): OK
btape: btape.c:469 Rewound "LTO-3" (/dev/st0)
btape: btape.c:1091 Now moving to end of medium.
btape: btape.c:520 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:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:469 Rewound "LTO-3" (/dev/st0)
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!

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 = 451,136
=== 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 an EOF
then backup over the EOF 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.

This is not an *essential* feature ...

btape: btape.c:469 Rewound "LTO-3" (/dev/st0)
btape: btape.c:704 Wrote first record of 64412 bytes.
btape: btape.c:715 Wrote second record of 64412 bytes.
btape: btape.c:726 Wrote third record of 64412 bytes.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:742 Backspaced over EOF OK.
btape: btape.c:747 Backspace record OK.
btape: btape.c:765
Block re-read correct. Test succeeded!
=== End Write, backup, and re-read test ===



=== Forward space files test ===

This test is essential to Bacula.

I'm going to write five files then test forward spacing

btape: btape.c:469 Rewound "LTO-3" (/dev/st0)
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:1571 Wrote one record of 64412 bytes.
btape: btape.c:1573 Wrote block to device.
btape: btape.c:499 Wrote 1 EOF to "LTO-3" (/dev/st0)
btape: btape.c:469 Rewound "LTO-3" (/dev/st0)
btape: btape.c:1305 Now forward spacing 1 file.
We should be in file 1. I am at file 1. This is correct!
btape: btape.c:1317 Now forward spacing 2 files.
We should be in file 3. I am at file 3. This is correct!
btape: btape.c:469 Rewound "LTO-3" (/dev/st0)
btape: btape.c:1330 Now forward spacing 4 files.
We should be in file 4. I am at file 4. This is correct!

btape: btape.c:1348 Now forward spacing 1 more file.
We should be in file 5. I am at file 5. This is correct!

=== End Forward space files test ===


Ah, I see you have an autochanger configured.
To test the autochanger you must have a blank tape
that I can write on in Slot 1.

Do you wish to continue with the Autochanger test? (y/n): y


=== Autochanger test ===

3301 Issuing autochanger "loaded" command.
Slot 24 loaded. I am going to unload it.
3302 Issuing autochanger "unload 24 0" command.
unload status=OK 0
3303 Issuing autochanger "load 1 0" command.
3303 Autochanger "load 1 0" status is OK.
27-Jan 16:46 btape: 3301 Issuing autochanger "loaded? drive 0" command.
27-Jan 16:46 btape: 3302 Autochanger "loaded? drive 0", result is Slot 1.
btape: btape.c:368 open device "LTO-3" (/dev/st0): OK
btape: btape.c:1235 Rewound "LTO-3" (/dev/st0)
btape: btape.c:1242 Wrote EOF to "LTO-3" (/dev/st0)

The test autochanger worked!!