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Date: Tue, 14 Jun 2005 23:15:33 +0100
From: Alex Zbyslaw <xfb52@dial.pipex.com>
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To: Chuck Swiger <cswiger@mac.com>
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Cc: freebsd-questions@freebsd.org, Damian Sobieralski <dsobiera@yahoo.com>
Subject: Re: tape record bigger than supplied buffer
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Chuck Swiger wrote:

> Alex Zbyslaw wrote:
>
>> Damian Sobieralski wrote:
>>
>>> I added the following to my tape drive area in the bacula-sd-conf:
>>>
>>> Minimum Block Size = 64512
>>> Maximum Block Size = 64512
>>>
>>>  I'm not seeing those errors any longer.  I've restored and all seems
>>> to go well.
>>
>>
>> Good stuff!  Did that number come out of your tape drive manual, in 
>> the end?  Just wondering why 64512 rather than 65536...
>
>
> It's 63K.  I've seen recommendations elsewhere to use a tape blocksize 
> of 63K rather than 64K if hardware compression is enabled, because 
> sometimes the data doesn't have a positive compression ratio...
>
Thanks for the tip!  That trailing 512 should have been a giveaway...

--Alex