Date: Wed, 16 Mar 2005 10:18:30 +0100 (CET) From: Ludo Koren <lk@tempest.sk> To: grog@FreeBSD.org Cc: freebsd-questions@FreeBSD.org Subject: Re: Backup on DDS-4 tapes Message-ID: <200503160918.j2G9IU5r001855@lk.tempest.sk> In-Reply-To: <20050315010407.GN12078@wantadilla.lemis.com> (grog@FreeBSD.org) References: <200503140938.j2E9c2EM024428@lk.tempest.sk> <20050315010407.GN12078@wantadilla.lemis.com>
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> On Monday, 14 March 2005 at 10:38:02 +0100, Ludo Koren wrote:
>> Hi,
>>
>> I am using 5.2.1-RELEASE-p3 for backup on DDS-4 tapes 40GB in
>> size.
>>
>> ...
>>
>> Why I cannot dump the filesystem on 2 tapes (it takes 3, it
>> seems it works without compression) no matter if I use dump or
>> cpio? What I am doing wrong?
> You're using dump :-)
> Dump is too stupid to understand compression or EOF marks, so
> it errs on the side of caution. It's also IMO not a very good
> backup medium unless you really want the incremental dump
> facility. Even between different releases of FreeBSD there are
> compatibility problems, and you can assume that there is no
> compatibility at all between different operating systems. You
> may find tar a better choice.
Surprisingly
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/backup-basics.html
in 16.1.7 suggests dump, though as the reference is used (maybe)
outdated E. Zwicky link...
Anyway, cpio cannot handle the problem too, and the tar in
5.2.1-RELEASE-p3 can handle multi-volume backup, but in the 5.3-STABLE
don't according to the man page.
I wonder what is then the best solution.
Regards,
lk
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