On Saturday, 28 September 2002 at 23:02:54 +0200, Hartmann, O. wrote:
> On Sat, 28 Sep 2002, Dan Nelson wrote:
>
>>> In the last episode (Sep 28), Hartmann, O. said:
>>>> Hello.
>>>>
>>>> While writing to a tape drive unit I get this kernel log:
>>>>
>>>> (sa0:sym1:0:5:0): Invalid request.  Fixed block device requests must be a 
>multiple of 1024 bytes
>>>
>>> Try running "mt blocksize 0" to enable variable-length blocks.  I think
>>> ancient QIC tape drives are the only ones that require a fixed
>>> blocksize.
>>>
>>> --
>>>     Dan Nelson
>>>     [EMAIL PROTECTED]
>>>
>
> Hello.
> I tried this, also, but with a similar effect. It think the HP SureStore 40x6i
> (DDS-4) isn't a ancient tape drive, the PC-recommended and factory default
> setting for this expensive DAT autoloader is 1024 bytes per block.
>
> I switched via mt blocksize 0 to variable blocksize, but then writing to
> the tape took much longer.

There are other DDS-4 drives that have a fixed block size of 1024
bytes.  I have a Sony drive which also requires it.  But why don't you
just supply the data in that format?  What are you writing?

Greg
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