Backing up root volume

Hi,

The DAR Tutorial suggests to use the following switches when backing up
the root volume specifically:

  -P dev/pts -P proc

I'm wondering if it is still true for modern Linux, especially for Linux
2.6 in which UDev is used.

Moreover, I want to backup file only in my root volume/partition, not files
on other partitions. 

So I choose the following switches to back up my root volume:

  -P dev -P proc -P sys/devices --no-mount-points

Please comment if it is appropriate? 
Any other useful switches to back up root volumes?

BTW, My root volume is mounted via unionfs:

  Filesystem           1K-blocks      Used Available Use% Mounted on
  rootfs                 3043856   2459752    429480  86% /
  /dev/root              3043856   2459752    429480  86% /

How does dar handle unionfs? E.g., will dar backup files unioned to root by
unionfs (files show up as in root but actually mounted from somewhere else)?

Thanks

-- 
Tong (remove underscore(s) to reply)
  http://xpt.sourceforge.net/



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