On Mon, Dec 29, 2003 at 04:04:18PM -0800, [EMAIL PROTECTED] wrote:
>
>Up until now I've been using 'tar' to archive/backup select user files
>plus certain system and program files. I would like however to start doing
>full system dumps as an extra bit of insurance. I've surfed around some but
>some of the info seems contradictive so I'd like to know what others are doing.
>I was thinking it might be nice to use a spare drive as the backup storage.
>Its my understanding that 'dump' and 'restore' work on _raw_ devices ; does
>this mean I ought to be able to, for instance, hook up my eternal scsi drive
>to my Sparc and just do 'dump -F -f /dev/rsd1c /' w/o having to worry about
>mounting or filesystem issues? I also read that one should always be in
>single-user mode when running dump/restore - is this always required or
>just with certain filesystems and/or dump options?
>
Dump does need to be able to understand the filesystem on the disk;
there is an ext{2,3} dump, a UFS dump, etc. The filesystem should not
be mounted, but you can dump from a mounted filesystem if you must.
There is no reiserfs dump ; they suggest you use GNU tar with the
bells on, which is a fairly reasonable solution. You do not need
to be single-user. The O'Reilly book "UNIX Backup and Recovery"
has a good discussion of dump, much of it is available online at
http://www.backupcentral.com/toc-excerpts.html
--
"That time in Seattle... was a nightmare. I came out of it dead broke,
without a house, without anything except a girlfriend and a knowledge of
UNIX." "Well, that's something," Avi says. "Normally those two are
mutually exclusive." --Neal Stephenson, "Cryptonomicon"
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