Dell Brocade 6520 Command Reference Supporting Fabric OS v7.1.0 - Page 238
Specifies the Tape Read Ahead mode of the LUN. When Tape Read Ahead is, enable_encexistingdata
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2 cryptoCfg native The LUN uses the Brocade metadata format and algorithm for the encryption and decryption of data. This is the default mode. DF_compatible The LUN uses the NetApp DataFort metadata format and algorithm for the encryption and decryption of data. Use of this format requires a NetApp DataFort-compatible license to be present on the encryption switch or the chassis that houses the encryption blade. -encrypt | -cleartext Enables or disables the LUN for encryption. By default, cleartext is enabled (no encryption). When the LUN policy is changed from encrypt to cleartext, the following policy parameters become disabled (default) and generate errors when executed: -enable_encexistingdata, -enable_rekey, and -key_lifespan. When a LUN is added in DF-compatible encryption format, -cleartext is rejected as invalid. -enable_encexistingdata | -disable_encexistingdata Specifies whether or not existing data should be encrypted. The Encryption policy must be enabled on the LUN before the -enable_encexistingdata parameter can be set and the LUN state must be set to -cleartext. By default, encryption of existing data is disabled. If LUN policy is set to -encrypt, the encryption of existing data must be enabled, or existing data is not preserved. This policy is not valid for tape LUNs. -enable_rekey time_period | -disable_rekey Enables or disables the auto rekeying capability on the specified disk LUN. This operand is not valid for tape LUNs. By default, the automatic rekey feature is disabled. Enabling automatic rekeying is valid only if the LUN policy is set to encrypt. You must specify a time_period in days when enabling auto rekeying to indicate the interval at which automatic rekeying should take place. -key_lifespan time_in_days | none Specifies the lifespan of the encryption key in days. The key will expire after the specified number of days. Accepted values are integers from 1 to 2982616. The default value is none, which means, the key does not expire. This operand is valid only for tape LUNs. The key lifespan cannot be modified after it is set. -newLUN Indicates that the LUN created does not contain any user data and will be part of a replication configuration. This operand is optional. The presence of this operand is incompatible with the -keyID, -key_lifespan, and -enable_rekey options. An RSA DPM must be configured and replication must be enabled (cryptocfg --set replication enabled) before invoking this command. Both primary and remote mirror LUNs must be added to their container with the -newLUN option. -write_early_ack disable | enable Specifies the Tape Write pipelining mode of the LUN. This option enables or disables early acknowledgement of commands (internal buffering) for a tape LUN. This feature is enabled by default. -read_ahead disable | enable Specifies the Tape Read Ahead mode of the LUN. When Tape Read Ahead is disabled, the tape LUN operates in unbuffered mode. When Tape Read ahead is disabled, the tape LUN operates in buffered mode. This feature is enabled by default. 210 Fabric OS Command Reference 53-1002746-01