[BBLISA] using dump?

[Brian O'Neill]

You cannot specify more than one filesystem on the command line. I 
believe that version of dump supports specifying more than one directory 
or file, but they must all live on the same filesystem.

To dump more than one filesystem on a single tape, you need to run 
successive dump commands and use the "no-rewind" device name for the 
tape drive - i.e. /dev/nst0 instead of /dev/st0. When you need to 
restore a particular filesystem, you need to use "mt" to skip forward to 
the appropriate "file" (each dump is a single file on the tape) and then 
issue the restore command.

As for NFS, I've never tried to use dump with an NFS mounted filesystem 
in recent history. In the "old days", you couldn't - dump only worked on 
a local UFS/FFS filesystem. Since the NFS servers were themselves UNIX 
servers, we always backed them up locally anyways.

It _might_ work for NFS with the directories-or-files mode instead of 
filesystem mode, but from reading the man page there are restrictions - 
specifically no incremental dumps.

Scott Ehrlich wrote:
> I finally got a tape drive installed on a RHEL5 server, and want to dump 
> multiple local filesystems (and eventually NFS-mounted ones) to tape.
> 
> What is the most recommended dump command line option setup to use?
> 
> I've tried, for example,
> 
> dump -0u -z2 -f /dev/st0 / /home but that failed
> 
> dump -0u -z2 -f /dev/st0/home.dump / /home but that failed
> 
> dump -0u -z2 -f /dev/st0 /home does work (one filesystem).
> 
> Can I safely have multiple dump statements to reflect each filesystem to 
> dump?
> 
> I want to dump /var and /home anyway, and ideally the whole filesystem.
> 
> Once I get an NFS system mounted, any changes to how I would dump it, or 
> simply use its local mount point?
> 
> Thanks.
> 
> Scott
> 
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