[Dar-support] Using par2 with dar

[Leslie R. <lr...@sa...>]

	Having gotten a basic handle on using dar to archive my backup RAID
array, I am now looking into using par2 to provide additional protection
against modest amounts of file corruption on the dar slices.  I have a few
questions, however.  The default for par2 is to create a number of .par2
files for any large source file.  Given the dar slices in my case are going
to be huge - about 500 Gigabytes each - by default par2 will be creating
huge numbers of .par2 files for each slice, and perhaps 3 or 4 (or more)
times that on each backup drive.  Is there any real advantage to this?  One
can use the -n option in par2 to limit the number of par2 files.  Would this
be prudent?  Given the vast size of the dar slices, should I increase the
memory usage for par2?  Will setting -n 1 cause problems or make the process
unnecessarily slow?