[KLUG Members] xfsdump

[Adam Williasm]

>>When using xfsdump to backup a bunch of different filesystems to tape
>>(/srv, /home, /opt, ...)  is it faster to use the norewind tape device
>>on each xfsdump command (/dev/nst0), or doesn't it matter (/dev/st0)?
> i.e.:
> TODAY="$(date +%Y%m%d)"
> xfsdump -e -o -l 0 -F -L "root-${TODAY}"  -f /dev/st0 /
> xfsdump -e    -l 0 -F -L "srv-${TODAY}" -f /dev/nst0 /srv
> xfsdump -e    -l 0 -F -L "home-${TODAY}" -f /dev/nst0 /home
> xfsdump -e    -l 0 -F -L "boot-${TODAY}" -f /dev/nst0 /boot
> xfsdump -e    -l 0 -F -L "opt-${TODAY}" -f /dev/nst0 /opt
> xfsdump -e    -l 0 -F -L "var-${TODAY}" -f /dev/nst0 /var

I've never used the non-rewinding tape devices for xfsdump,  with the 
normal devices xfsdump automatically seeks to the end of previous dumps 
unless told to overwrite.  I suppose non-rewinding devices would be 
faster, but I don't know what affect their use would have on the dump 
journal (would it be confused?).