tape record bigger than supplied buffer

[Alex Zbyslaw]

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