On Wed, Jul 19, 2006 at 02:07:42PM -0700, gil naveh wrote:
>     Thanks for all the help, but I have a problem to restore the  files.
>   When I type:
>   root@ # dd if=/dev/rmt/0n ibs=64k | ufsrestore if -
>   I recieve the following error message:
>   read: Invalid argument
>   0+0 records in
>   0+0 records out
>   Volume is not in dump format
>   
>   But as far as I know it should be in a dump format!!! ? because in the 
> Amanda.conf  I defined the backup as:
>        
>       define dumptype daily {
>          global
>          # program  "DUMP"     # the default
>          # record yes         # the default
>          comment  "daily"
>          compress client  fast
>          priority high
>          # dumpcycle 5        # should be obtained from dumpcycle  above
>          index yes
>       }
>   
>   
>       I also tried the following:
>   % mt -f /dev/rmt/0n rewind     
>   % dd if=/dev/rmt/0n of=/tmp/data bs=64k count=2
>   % od -c /tmp/data | head
>   
>   And received the following output:
>   0000000  \0 002   P 022  \0  \f  \0  001   .  \0  \0  \0  \0 003 242   Q
>   0000020  \0  \f  \0 002   .   .   \0  \0  \0 002   P 023 001 350  \0 006
>   0000040   n   e   w   b    c   k  \0  \0  \0  \f  \0 003    b   c   k  \0
>   0000060  \0  \0  \0  \0 001 320  \0 006    n   e   w   b   c   k   \0  \0
>   0000100  \0  \0  \0  \0  \0  \0  \0   \0  \0  \0  \0  \0  \0  \0  \0  \0
>   *
>   0001000
>   
>   Can one deduct the dump format from the above output?
>   
>   Many thanks,
>   gil
>     Paul Bijnens <paul.bijnens AT xplanation DOT com> wrote:  
> On 2006-07-19 17:35, gil naveh wrote:
> > Thanks for the help.
> > I am familiar with the Amrestore command.
> 
> Then you understand that you can replace "amrestore" with a
> "mt" and "dd".
> 
> 
...
> The docs in  http://www.amanda.org/docs/restore.html
> are a little more expanded, giving more examples in:
> 
>     http://wiki.zmanda.com/index.php/Restoring_files
>

Grrr, I hate top posting.
So hard to add inline and following

Anyway, several points.

We don't know it should be a ufsdump, your dumptype includes
global that we don't see and otherwise does not define PROGRAM.

You keep using a blocksize of 64k for dd, why?  Amanda normally
uses 32k.

Have you read the docs refered to above for how to recover?

Your dumptype says compress, presumably with gzip.  I see no
unzipping in your attempted recovery
commentary.

Following an mt rewind, the first thing a dd should see is
the tape label header file.  Your output is certainly NOT
an amanda tape label.  Are you certain this is a valid
amanda tape?  Or you showed the sequence of commands accurately?

Solaris has a fine file(1) command.  What does "file /tmp/data"
tell you about what dd pulled from the tape?


-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
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