support quality (Re: dump | restore fails: unknown tapeheadertype 1853384566)

Karl Denninger karl at
Thu Mar 26 11:48:04 PDT 2009

Mike Tancsa wrote:
> At 01:11 PM 3/26/2009, Jack L. Stone wrote:
>> No one has said the dump "L" is broken -- and is NOT but now may mislead
>> others just tuning into this thread.
> OK, sorry I misunderstood that restore worked from dump files without 
> -L....
> I wonder if the original poster just needs to do an fsck on the disk. 
> The only time I had dump crap out on me (other than with -L) was on a 
> dirty filesystem.
> I regularly do stuff like
> cd /usr;dump 0f - /usr | (cd /tmp/usr; restore -rf - )
> to duplicate partitions
>         ---Mike
I do as well but if the original user is trying to restore into a 
filesystem that is either not clean or not EMPTY for a full restore he 
could run into some trouble.

I've never had  dump/restore fail by the way, other than due to bad 
(tape) media (yes, it was that long ago :) )

Karl Denninger
karl at

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