[techtalk] backups in cron using dump

[Jennifer Tippens]

Hello again!  I think I have done this correctly, but I've never used the dump command before, so there might be a better way.  We have a 24G DDS3 tape drive, so I think I don't have to tell the dump program the density, blocksize or length, please let me know if I really should.  Below is the relevent part of root's crontab.  Does it look ok?
Thanks so much,

Jennifer

p.s. thanks everyone on the Silicon Valley tips - I think I'm going to go for it.

#---------------------------------------------------------------------------
# Backups
#---------------------------------------------------------------------------
# Every thursday  at around midnight 'till 1am do a full backup 
# of the filesystems /home /usr and /holding -jen
0  0  * * 4 /sbin/dump 0urf /home /dev/nst0
20 0  * * 4 /sbin/dump 0urf /usr  /dev/nst0
40 0  * * 4 /sbin/dump 0urf /holding /dev/nst0

# Do the incremental backups of these filesystems on the subsequent days.
# The incremental level is a tower of Hanoi so that Friday and Monday night 
# backups both contain changes since thursday and tuesday and wednesday both 
# contain changes since Monday.  Each is appended to the end of
# the non rewind tape. Also done between midnight and 1am.

0  0 * * 5 /sbin/dump 3urf /home /dev/nst0
20 0 * * 5 /sbin/dump 3urf /usr  /dev/nst0
40 0 * * 5 /sbin/dump 3urf /holding /dev/nst0

0  0 * * 1 /sbin/dump 2urf /home /dev/nst0
20 0 * * 1 /sbin/dump 2urf /usr  /dev/nst0
40 0 * * 1 /sbin/dump 2urf /holding /dev/nst0
 
0  0 * * 2 /sbin/dump 5urf /home /dev/nst0
20 0 * * 2 /sbin/dump 5urf /usr  /dev/nst0
40 0 * * 2 /sbin/dump 5urf /holding /dev/nst0
 
0  0 * * 3 /sbin/dump 4urf /home /dev/nst0
20 0 * * 3 /sbin/dump 4urf /usr  /dev/nst0
40 0 * * 3 /sbin/dump 4urf /holding /dev/nst0
# end backup cron jobs.
#---------------------------------------------------------------------------