Re: [Dump-users] Remote dumps with dd and ssh: blocksize issue

[Stelian P. <st...@po...>]

Hi Eric,

> restore -t -b 64 -f /dev/nst0
> 
> I get an error saying that the block size is wrong, and I should try  
> "-b 64" instead!

[...]

> But if instead I do this:
> 
> dd if=/dev/nst0 bs=64k | restore -t -b 64 -f  -
> 
> everything works fine.   That is, restore can read 64k blocks from  
> standard input just fine, but doesn't seem to want to read them  
> directly from the tape (or somehow the tape drive isn't delivering  
> them correctly to restore when called directly).

I checked the source code and didn't find anything obviously wrong which
could explain what is happenning.

I suggest adding -d and -v to your restore command line (debug and
verbose enabled) and see if this generates more information. You can
also try to instrument the findtapeblksize() function in restore/tape.c,
which is probably the place where something goes wrong.

Thanks,

Stelian.
-- 
Stelian Pop <st...@po...>