HP B6960-90078 manual Device Backup Options, CRC Check, Concurrency, Media Pool, Prealloc List

Backup

Using Backup Options

Device Backup Options

You can select the options listed below for each backup device in use. None of the settings are needed, because CRC Check, Concurrency, and Media Pool use the default values that are set when the device is configured. The Prealloc List value is specified along with the media pool settings.

CRC Check

Set this option to have Data Protector calculate the CRC (Cyclic Redundancy Check) when a backup runs. CRC is an enhanced checksum function that lets you later confirm using the Verify option whether or not data has been written correctly to the medium.

The default value is OFF.

Concurrency

Concurrency allows more than one Disk Agent to write to one backup device. Data Protector can then keep the devices streaming if data can be accepted faster than a Disk Agent can send it. The maximum concurrency value is 32.

Data Protector provides default values for all supported devices.

Media Pool

This option selects the media pool with the media you will use for a backup. If not defined, a default pool, which is a part of device specification, is used.

Prealloc List

The Prealloc List is a subset of media in the media pool used for a backup. It specifies the order in which the media will be used. When using the Prealloc List and the Strict media allocation policy with the backup device, Data Protector expects the sequence of the media in the device to correspond with that specified in the Prealloc List. If the media are not available in this sequence, Data Protector issues a mount request. If no media are specified in this list, then the Data Protector allocation procedure is used to allocate media.

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