Re: [Dump-users] dump & cdrecord

[Helmut J. <jar...@ig...>]

On 20 Dec, David Gesswein wrote:
>> That's what the restore -V option is there for. 
>> 
>> Correction: looking at the source I see that -V is used only when 
>> reading multi-volume *compressed* dumps (and indeed, this is what I
>> use myself). I wonder whether uncompressed dumps need a special treatement
>> or not...
>> 
> Works fine if I compress with -z1. Since the data wasn't too compressable I
> had decided to not compress. With compression does a read error make
> the rest of the backup unreadable or does the decompression resync?
> 
> Might be good to document the interaction of -V and compression if not
> done already.

1st) you can take -y  (lzo compression) which is really fast
2nd) with -y each block is compressed individually, i.e.
     if some block has a read error cdrecord might continue,
     but the compressed block contains a length field.
     I am not sure what will happen if this is completely
     unreasonable.
     
-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany