Data Protector NDMP Integration Quickstart Guide

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Figure 16: Specifying the Data Protector block size used to write the backup to a virtual tape drive.
For an NDMP-controlled backup, the data stream is not in a Data Protector format. The default format
is dump (others are possible), which can use different blocking factors. The blocking factor determines
the size of the units of backup data moved and processed by the NDMP Server.
In Data Protector, the blocking factor is specified as an NDMP environment variable in the backup
object properties, as shown in Figure 17. The syntax and default values for the blocking factor
parameter are different for an HP X9000 and a NetApp FAS3070 as shown in Table 2.
Figure 17: Specifying the blocking factor environment variable in the backup object properties.
Table 2: HP X9000 and NetApp FAS3070 vendor-specific variables and values for the NDMP blocking factor.
NAS filer
Blocking factor parameter
Default value
Other available settings
HP X9000
BLOCKING_FACTOR
128 kB
64–256 kB
NetApp FAS3070
MOVER_RECORD_SIZE
63 kB
4–256 kB