[CentOS] reading old dump backups from 2009

[Stephen John Smoogen]

On Sat, 3 Nov 2018 at 06:27, Pete Biggs <pete at biggs.org.uk> wrote:
>
>
> >
> > restore tvf u1_l0_04-29-09_md1.dump Verify tape and initialize maps
> > Input is from a local file/pipe
> > Checksum error 20311110402, inode 0 file (null)
> > restore: Tape is not a dump tape
>
> what does 'file' think the file is - i.e. what does
>
>   file u1_l0_04-29-09_md1.dump
>
> say?
>
> >
> >
> > Here's a log file from when the backup was done back in 2009:
> >
> > DUMP: Date of this level 0 dump: Wed Apr 29 09:24:36 2009
> >    DUMP: Dumping /dev/md1 (/u1) to u1_l0_04-29-09_md1.dump
> >    DUMP: Label: /u1
> >    DUMP: Writing 10 Kilobyte records
> >    DUMP: Compressing output at compression level 2 (bzlib)
>
>
> >    DUMP: finished in 23704 seconds, throughput 4075 kBytes/sec
> >    DUMP: Date of this level 0 dump: Wed Apr 29 09:24:36 2009
> >    DUMP: Date this dump completed:  Wed Apr 29 16:00:09 2009
> >    DUMP: Average transfer rate: 2146 kB/s
> >    DUMP: Wrote 96607840kB uncompressed, 50878096kB compressed, 1.899:1
> >    DUMP: DUMP IS DONE
>
> The dump is compressed.  What was the command line you used to create
> the dump file?
>
> Have you tried using
>
>   restore tzvf u1_l0_04-29-09_md1.dump
>

I agree with Pete and it will be up to see what file and others say to
see which type of compression was done.. (z means gzip, j means bzip2
which would be the ones from 2009).

> >
> > Have there been any changes to the format of dump files and if so, is
> > there a version available that can read this older backup?
>
> I don't think dump has changed anything in 20 years or so!  And I
> certainly can't see it changing such that it can't read old files -
> that is, sort of, it's raison d'etre.
>
> P.
>
>
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-- 
Stephen J Smoogen.