Configure Drives - HP D2D Manual

Configure drives

A single drive within the File Library will be automatically created, this allows for a single stream
backup to the File Library. If multiple backup streams to the File Library are required, additional
drives can be created. See D2D Best Practices for VTL, NAS and Replication implementations for
more information on the maximum numbers of concurrent streams and recommendations on how
many streams should be used for the different D2D Backup System products.
There are several settings for each drive that must be correctly configured in order to provide good
D2D performance. Highlight each drive and select Properties. Go to the Settings Tab and click
Advanced.
Advanced menu — Settings tab
On the Settings Tab of the Advanced menu is an option for Concurrency, this indicates how many
parallel streams can write to that drive simultaneously, the default is three. Concurrency is a Data
Protector term for Multiplexing, so the backup streams would be interleaved within the backup file,
this is bad for deduplication so Concurrency should be set to 1 in order to prevent multiplexing.
Advanced menu — Sizes tab
On the Sizes tab the following settings are defined
Block Size: this should be set to 512 KB for best performance
Segment Size: this is how often a catalog section is written; it can be left at the default of 10
GB
Disk Agent Buffers: this setting can be tuned to improve performance for slow client systems
or media servers, the default of 8 is generally acceptable
18 Configure Data Protector to use D2D CIFS Share