Brocade Network Advisor SAN User Manual v11.1x (53-1002167-01, May 2011)

Brocade Network Advisor SAN User Manual 533
53-1002167-01
Tape LUN write early and read ahead
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Tape LUN write early and read ahead
The tape LUN write early and read ahead feature uses tape pipelining and prefetch to speed serial
access to tape storage. These features are particularly useful when performing backup and restore
operations, especially over long distances.
You can enable tape LUN write early and read ahead while adding the tape LUN for encryption, or
you can enable or disable these features after the tape LUN has been added for encryption.
For more information, see the following topics:
• “Adding target tape LUNs for encryption” on page 529
• “Enabling and disabling tape LUN write early and read ahead” on page 533
Enabling and disabling tape LUN write early and read ahead
To enable or disable tape LUN write early and read ahead, follow these steps:
1. Select Configure > Encryption from the menu task bar.
The Encryption Center dialog box displays (Figure 153).
2. Select a group, switch, or engine from the Encryption Center Devices table, then select
Group/Switch/Engine > Targets from the menu task bar, or right-click the group, switch, or
engine and select Targets.
NOTE
You can also select a group, switch, or engine from the Encryption Center Devices table, then
click the Targets icon.
The Encryption Targets dialog box displays (Figure 242).
FIGURE 242 Encryption Targets dialog box
3. Select a target tape storage device from the table, then click LUNs.
The Encr yption Target Tape LUNs dialog box displays (Figure 243).