User guide

a host panic may occur and this configuration is not supported in the Fabric OS 6.3.1 or later

release.

• Hot Code Load from Fabric OS 6.4.1a to Fabric OS 7.0.0c is supported. Cryptographic

operations and I/O are disrupted, but other layer 2 FC traffic is not disrupted.

• Relative to the HP StorageWorks Encryption SAN Switch and an HP StorageWorks DC SAN

Backbone Director Switch / HP StorageWorks DC04 SAN Director Switch/ HP SN8000B

8-Slot SAN Backbone Director Switch, and the HP SN8000B 4-Slot SAN Director Switch with

HP StorageWorks DC Switch Encryption FC Blade, all nodes in the Encryption Group must

be at the same firmware level of Fabric OS 6.2 or later before starting a rekey or First Time

Encryption operation. Make sure that existing rekey or First Time Encryption operations complete

before upgrading any of the encryption products in the Encryption Group. And make sure

that the upgrade of all nodes in the Encryption Group completes before starting a rekey or

First Time Encryption operation.

• To clean up the stale rekey information for the LUN, use one of the following methods:

Method 1:◦

1. Modify the LUN policy from encrypt to cleartext and commit. The LUN becomes

disabled.

2. Enable the LUN using cryptocfg --enable –LUN. Modify the LUN policy from

clear-text to encrypt with enable_encexistingdata to enable the first

time encryption and do commit. This clears the stale rekey metadata on the LUN and

the LUN can be used again for encryption.

◦ Method 2:

1. Remove the LUN from Crypto Target Container and commit.

2. Add the LUN back to the Crypto Target Container with LUN State=clear-text,

policy=encrypt and enable_encexistingdata set for enabling the First Time

Encryption and commit. This clears the stale rekey metadata on the LUN and the

LUN can be used again for encryption.

• When disk and tape CTCs are hosted on the same encryption engine, re-keying cannot be

done while tape backup or restore operations are running. Re-keying operations must be

scheduled at a time that does not conflict with normal tape I/O operations. The LUNs should

not be configured with auto rekey option when single EE has disk and tape CTCs.

• For new features added to encryption in Fabric OS 6.4.0, such as, disk device

decommissioning, combined disk-tape encryption support on the same encryption engine,

and redundant key ID metadata option for replication environments, all the nodes in the

encryption group must be running Fabric OS 6.4.0 or later versions of Fabric OS. Firmware

downgrade is prevented from Fabric OS 6.4.0 to an earlier version if one or more of these

features are in use.