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Setting Up the Dell DR Series System as an RDA or VTL Backup Target for Dell NetVault Backup
Pre-Deduplication
W
ee
k
Logical
Size
Logical
Full Metrics
10% Change Rate
Logical
Incremental Metrics
1
24.2TB
20TB
2TB
2
24.2TB 20TB 2TB
3
24.2TB 20TB 2TB
4
24.2TB 20TB 2TB
5
24.2TB 20TB 2TB
Total
121TB
A.2.4 Media retention and grouping
Due to the nature of Virtual Tape Libraries media must be managed in order to insure that physical capacity is
reclaimed in an orderly fashion to avoid running out of space and disrupting operations. Media must be
grouped within the data management application, such as NetVault Backup, in a way that full data sets are
targeted to separate media as incremental data and they in turn are grouped by data sets that expire within
the same period or that share the same recovery point
objective. This ensures that media can be reused
effectively so that when full all incremental data expire the logical space can be reconciled thus enabling the
physical space to be reclaimed.
A.2.5 VTL media count guidelines
Type Capacity Max number of Tapes supported
LTO-4 800GiB 2000
LTO-3 400GiB 4000
LTO-2 200GiB 8000
LTO-1 100Gib 10000
LTO-1 50Gib 10000
LTO-1 10GiB 10000