__/ [ Unruh ] on Tuesday 21 March 2006 21:22 \__
> Roy Schestowitz <newsgroups@xxxxxxxxxxxxxxx> writes:
>>__/ [ Unruh ] on Tuesday 21 March 2006 21:10 \__
>>> Roy Schestowitz <newsgroups@xxxxxxxxxxxxxxx> writes:
>>>>To cut a long story short, I wish to compress (or tar because it's
>>>>quicker) data and to also slice the resultant files into volumes, from
>>>>the command-line (this should be a routine backup job).
>>>>The longer story: external hard-drive uses some odd filesystem which is
>>>>case insensitive. Must compress or tar data to preserve case. Must also
>>>>slice to 'chunks' as the data exceeds 4 GB, which at least for the
>>>>external hard-drive, is too much.
>>> man tar
>>> man split
>>> tar -cf - /odd/filesystem|split -b 10m - backup.tar
>>> You will get backup.tar.1 backup.tar.2 ....
> Sorry, you would get
> backup.taraa backup.tarab ...
> Instead split -b 10m - backup.tar.
> would give
> backup.tar.aa backup.tar.ab ( up to .zz) If you have even more than 26^2
> you can give the opion
> split -b 10m -a 4 - backup.tar.
> to do
> backup.tar.aaaa backup.tar.aaab to .zzzz
> If you really want numbers, use the -d option to split
Thanks again! It's all 'cooking' at this very moment. It is not very likely
that I will need to reassemble as it is the third among the mirrors, with
the advantage of retaining a /stack/ of backups, which leaves a long trail
to return to (a 300 GB-long trail). I have set this up as an executable
script in my desktop, so it's a one-click job, creating volumes that are 1
gigabyte each. In hindsight, perhaps I could have or should have reformatted
the hard-drive. It seemed risky.