Veritas NetBackup™ Administrator's Guide, Volume II
- NetBackup licensing models and the nbdeployutil utility
- How capacity licensing works
- Creating and viewing the licensing report
- Reviewing a capacity licensing report
- Reconciling the capacity licensing report results
- Reviewing a traditional licensing report
- Reviewing an NEVC licensing report
- Additional configuration
- About dynamic host name and IP addressing
- About busy file processing on UNIX clients
- About the Shared Storage Option
- DELETE About configuring the Shared Storage Option in NetBackup
- Viewing SSO summary reports
- About the vm.conf configuration file
- Holds Management
- Menu user interfaces on UNIX
- About the tpconfig device configuration utility
- About the NetBackup Disk Configuration Utility
- Reference topics
- Host name rules
- About reading backup images with nbtar or tar32.exe
- Factors that affect backup time
- NetBackup notify scripts
- Media and device management best practices
- About TapeAlert
- About tape drive cleaning
- How NetBackup reserves drives
- About SCSI persistent reserve
- About the SPC-2 SCSI reserve process
- About checking for data loss
- About checking for tape and driver configuration errors
- How NetBackup selects media
- About selecting media in robots
- About selecting media in standalone drives
- About Tape I/O commands on UNIX
About frequency-based cleaning
Frequency-based cleaning occurs when the accumulated mount time exceeds the time you specify for the cleaning frequency. NetBackup updates the mount time for the drive each time a tape is unmounted.
The cleaning frequency is configured when a drive is added to NetBackup. Change the cleaning frequency by changing the drive properties or by using the Media and Device Management Device Monitor in the NetBackup Administration Console.
If the following conditions are met, drive cleaning occurs when the accumulated mount time exceeds the time specified for the cleaning frequency:
The drive is in a robotic library that supports drive cleaning.
A cleaning tape is configured and available for the robotic library.
The cleaning tape has cleanings remaining.
NetBackup cleans the drive immediately after a tape is unmounted. Drive cleaning does not unmount a drive in the middle of an active backup. The mount time is reset after the drive is cleaned. The cleaning frequency value remains the same.
A cleaning can occur within a backup if the backup spans tapes. For example, if cleaning is due after the first tape is full, NetBackup cleans the drive before it mounts the next tape.
Media can remain in a drive for extended periods. It does not affect the cleaning frequency because NetBackup increments the mount time only when NetBackup assigns the media to a process.
Frequency-based cleaning is not supported for drives in the ACS libraries that are under API robotic control. The robotic library software controls the drive cleaning. To manage drive cleaning for these robots, use the robot vendor interfaces.