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NetVault 12.2 - Administration Guide

Introduction Getting started Configuring clients Managing catalog search Configuring storage devices Backing up data Managing policies Restoring data Managing NetVault Backup dashboard Managing jobs Monitoring logs Managing storage devices
Monitoring device activity Managing disk-based storage devices in list view Managing disk-based storage devices in tree view Managing the Snapshot Array Manager Managing tape libraries in list view Managing tape libraries in tree view Managing tape drives in list view Managing tape drives in tree view Adding shared devices
Managing storage media Managing user and group accounts Monitoring events and configuring notifications Reporting in NetVault Backup Working with client clusters Configuring default settings for NetVault Backup
About configuring default settings Configuring encryption settings Configuring plug-in options Configuring default settings for post-scripts Configuring default settings for Verify Plug-in Configuring Deployment Manager Settings Configuring Job Manager settings Configuring Logging Daemon settings Configuring Media Manager settings Configuring Network Manager settings Configuring Process Manager settings Configuring RAS device settings Configuring Schedule Manager settings Configuring Web Service settings Configuring Auditor Daemon settings Configuring firewall settings Configuring general settings Configuring security settings Synchronizing NetVault Time Configuring default settings for global notification methods Configuring the reporting utility Configuring NetVault Backup WebUI default settings Configuring NetVault Backup to use a specific VSS provider Configuring default settings using Txtconfig
Diagnostic tracing Managing diagnostic data Using the deviceconfig utility NetVault Backup processes Environment variables Network ports used by NetVault Backup Troubleshooting

Configuring physical tape drives

To configure options for a tape drive:
1
In the Navigation pane, click Manage Devices.
2
In the list of devices, locate and click the drive to configure.
3
Click Configure.
4
In the Edit Drive dialog box, configure the settings in the following tabs:
•
NDMP Configuration: The NDMP parameters are available here. The default settings for any parameter on this tab must not be changed unless otherwise advised by Quest Support. For more information about these settings, see NDMP settings.
•
Configuration: Set the required parameters here.The default settings for any parameter on this tab must not be changed unless otherwise advised by Quest Support. For more information about these settings, see General settings for tape drives.
•
Performance: For more information about these settings, see Drive performance settings.
•
Statistics: For more information about these settings, see Statistics collection settings.
•
SCSI Configuration: The default timeout value for the different types of SCSI commands is set to zero, which correspond to the following intervals:
•
Fast SCSI Commands – 300 seconds
•
Slow SCSI Commands – 900 seconds
•
Very Slow SCSI Commands – 3 hours
An error is logged if a command execution does not complete within the specified interval. You should not change the default timeout for any of the SCSI commands unless otherwise advised by Quest Support.
•
Generic Cleaning: To configure generic cleaning settings for a tape drive, select this option. For more information about these settings, see Generic cleaning settings.
 
5
Click OK to save the settings and close the dialog box.

Optimal transfer buffer size

The following table provides examples of the optimal values that can be used for some drive types.

 
Table 91. Optimal transfer buffer size of different drive types
Drive type
Optimal transfer buffer size (in KiB)

Fast Modern Tape Drives

For example, LTO series, SDLT, and SAIT

65537 (64MiB + 1KiB)

Medium Speed Tape Drives

For example, DLT8000, DLT7000, and AIT-3

32769 (32MiB + 1KiB)

Older Professional Tape Drives

For example, DLT2000, DLT4000, and AIT-2

16385 (16MiB + 1KiB)

Older Low Capacity Low-end Drives

For example, EXB-8505, AIT-1, and DAT

8193 (8MiB + 1KiB)

Checking the status of a tape drive

To check the status of an offline tape drive:
1
In the Navigation pane, click Manage Devices.
2
In the list of devices, locate and click the drive.
3
Click Check, and then in the confirmation dialog box, click OK.
If the device is operational, its status is changed to “Available.”

Changing the status of a tape drive

To change the drive status to online or offline:
1
In the Navigation pane, click Manage Devices.
2
In the list of devices, locate and click the drive.
3
Click Online or Offline:
•
If the device is offline, click Online to bring it back online.
•
If the device is online, click Offline to mark it offline.
This operation does not physically take the device offline; it just makes the device unavailable for use in NetVault Backup.
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