dump | restore fails: unknown tape header type 1853384566

[Dimitry Andric]

On 2009-03-24 07:30, Mikhail T. wrote:
>     dump a0f  - /old | restore -rf -
>     [...]
>       DUMP: 17.25% done, finished in 3:27 at Tue Mar 24 05:42:00 2009
>       DUMP: 20.36% done, finished in 3:09 at Tue Mar 24 05:28:13 2009
>       DUMP: 23.83% done, finished in 2:50 at Tue Mar 24 05:14:32 2009
>     unknown tape header type -621260722
>     abort? [yn]
> 
> Looks like a junk value somewhere... Unitialized variable or some such.

Hmm, I can't reproduce this at all; I use dump and restore quite
regularly in this way, and I have never encountered this issue (except
for the occasional 'expected file NNN, got file MMM', which is usually
harmless).

Maybe the dump output gets corrupted in some way?  (E.g. faulty RAM, or
disk?)  If you are dumping a live filesystem, could it possibly help to
add the -L option?