Bacula-users

Re: [Bacula-users] Tape utilization

2009-01-12 09:30:05
Subject: Re: [Bacula-users] Tape utilization
From: Walter den Besten <w.denbesten AT nimbuzz DOT com>
To: John Drescher <drescherjm AT gmail DOT com>
Date: Mon, 12 Jan 2009 15:27:27 +0100
Happy new year, to start with..

Took some time to get back to the tape problems, is not the only one  
we are having :( (enough to do here..)

But, checked cables, inserted the scsi controller card in an full PCI- 
X slot, and rerun the btape after reconfig to use /dev/nst0..

test command doesn't show any problems.
Tried fill with multiple tapes, and after about three hours, it ends  
with the following:
14:20:43 Flush block, write EOF
Wrote blk_block=1315000, dev_blk_num=3000 VolBytes=84,574,199,808  
rate=8675.2 KB/s
Wrote blk_block=1320000, dev_blk_num=8000 VolBytes=84,896,759,808  
rate=8684.2 KB/s
Wrote blk_block=1325000, dev_blk_num=13000 VolBytes=85,219,319,808  
rate=8693.2 KB/s
Wrote blk_block=1330000, dev_blk_num=2500 VolBytes=85,541,879,808  
rate=8696.8 KB/s
Wrote blk_block=1335000, dev_blk_num=7500 VolBytes=85,864,439,808  
rate=8695.1 KB/s
Wrote blk_block=1340000, dev_blk_num=12500 VolBytes=86,186,999,808  
rate=8690.0 KB/s
14:24:32 Flush block, write EOF
Wrote blk_block=1345000, dev_blk_num=1000 VolBytes=86,509,559,808  
rate=8677.9 KB/s
12-Jan 14:24 btape JobId 0: End of Volume "TestVolume1" at 126:2437 on  
device "TapeStorage" (/dev/nst0). Write of 64512 bytes got -1.
12-Jan 14:25 btape JobId 0: Re-read of last block succeeded.
btape: btape.c:2349 Last block at: 126:2436 this_dev_block_num=2437
btape: btape.c:2383 End of tape 126:0. VolumeCapacity=86,602,263,552.  
Write rate = 8666.3 KB/s
12-Jan 14:25 btape JobId 0: End of medium on Volume "TestVolume1"  
Bytes=86,602,263,552 Blocks=1,342,421 at 12-Jan-2009 14:25.
Mount blank Volume on device "TapeStorage" (/dev/nst0) and press  
return when ready:


So, again about 86 GB on the tape..

After some tape juggling got following message:
The last block on the second tape matches. Test succeeded.

So test is successful, but not full tape usage as I was hoping for.

On 31 dec 2008, at 08:45, John Drescher wrote:

> On Wed, Dec 31, 2008 at 2:25 AM, Walter den Besten
> <w.denbesten AT nimbuzz DOT com> wrote:
>> Following information is found in dmesg and /var/log/messages:
>> dmesg info:
>> <removed>
>> /var/log/messages:
>> <removed>
>> Any idea how to pin-point the problem?
>>
>
> None of that looks bad. Check the scsi cabling and also you can try
> the btape tests or even try to fill a tape with tar or dd.
>
> I would look into this furthur but its 2:45 in the morning here.
>
> John


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