On Friday 13 June 2003 13:00, Gene Heskett wrote:
>Hi all;
>
>I'm having some issues with attempting to work out a 'how much is
> left on this tape' scenario, and having a fixed block size of 32K
> on the tape so that an mt tell gives a reasonable and consistent
> value that can be used for these calculations.  And I'm apparently
> having trouble when a setblk 0 is in effect.
>
>The relative merits of setblk vs defblksize in setting these two
>parameters needs to be discussed/defined for the users again.
>
>For instance, attempting to do an 'mt -f /dev/ice defblksize' of
>anything other than 512 bytes renders the tape unreadable by amanda.

CORRECTION: amcheck cannot read it unless the defblksize in effect 
matches that which was in effect when the label block was last 
written.  Then it works.

>Or dd for that matter until you hit the magic twanger by resetting
> defblksize to whatever was in effect at the time the tape was last 
> written.
>
>So, regardless of the danger of repeating a 2 year old discussion,
> can we have that discussion again from the real experts?  I've
>re-installed enough times that those threads are gone from my own
>mail archives, and maybe some of the rest of us could use a
> refresher on this subject too.
>
>Many thanks for any clarification that the amanda authors can do
> here.

-- 
Cheers, Gene
AMD K6-III@500mhz 320M
Athlon1600XP@1400mhz  512M
99.26% setiathome rank, not too shabby for a WV hillbilly
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Copyright 2003 by Maurice Eugene Heskett, all rights reserved.