Data Backup12-21
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This section provides a sample backup schedule for backing up a filer with seven vol-
umes. The schedule uses the following assumptions:
A low rate of change enables you to fit multiple incremental backups on one tape.
Two incremental backups performed on each volume each week offer sufficient
data protection due to a low rate of change.
The level-0 backup takes 10 hours.
According to this schedule, the filer performs the following types of backups:
The filer fully backs up each volume once a week.
The filer performs a level-1 backup and a level-2 backup for each volume every
week.
The filer does not rewind the tape for each level-1 backup so that the subsequent
level-2 backup can be written immediately after the level-1 backup on the tape.
Thursday filer2:
dump 0uf filer1:urst0a,urst0a,urst0a /vol/vol5
filer1:
dump 1uf nrst1a /vol/vol3
filer1:
dump 2uf urst1a /vol/vol1
Friday filer3:
dump 0uf filer1:urst0a,urst0a,urst0a /vol/vol6
filer2:
dump 1uf filer1:nrst1a /vol/vol4
filer1:
dump 2uf urst1a /vol/vol2
Saturday filer3:
dump 0uf filer1:urst0a,urst0a,urst0a /vol/vol7
filer2:
dump 1uf filer1:nrst1a /vol/vol5
filer1:
dump 2uf urst1a /vol/vol3

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