Technical data

194 Fabric OS Encryption Administrator’s Guide (DPM)
53-1002720-02
Tape pool configuration
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6. Verify that the DEKs are synched up from local site DPM cluster to the remote site DPM cluster.
NOTE
In all operations prior to enabling the RP source/target LUN consistency group, ensure that the
DEKs are synchronized between the local and remote site key vaults.
Behavior with Hosts writing beyond reported capacity
If a host writes beyond the reported capacity of a source or destination LUN, it can cause the LUN
to become disabled when exposed. Hosts must honor the READ CAPACITY10/READ CAPACITY16
data returned by the Brocade Encryption Switch for SRDF/TF/RP source and destination LUNs.
Tape pool configuration
Tape pools are used by tape backup application programs to group all configured tape volumes into
a single backup to facilitate their management within a centralized backup plan. A tape pool is
identified by either a name or a number, depending on the backup application. Tape pools have the
following properties:
• They are configured and managed per encryption group at the group leader level.
• All encryption engines in the encryption group share the same tape pool policy definitions.
• Tape pool definitions are only used when writing tapes. The tape contains enough information
(encryption method and key ID) to enable any encryption engine to read the tape.
• Tape pool names and numbers must be unique within the encryption group.
• If a given tape volume belongs to a tape pool, tape pool-level policies (defaults or configured
values) are applied and override any LUN-level policies.
• Tape drive (LUN) policies are used if no tape pools are created or if a given tape volume does
not belong to any configured tape pools.
NOTE
Tape pool configurations must be committed to take effect. Expect a five second delay before the
commit operation takes effect.There is an upper limit of 25 on the number of tape pools you can
add or modify in a single commit operation. Attempts to commit a configuration that exceeds this
maximum fails with a warning.
Tape pool labeling
Tape pools may be identified by either a name or a number depending on your backup application.
Numbers are always entered and displayed in hex notation. Names and numbers are independent;
it is possible to have one tape pool with the name ABC and another with the hex number ABC.
The following rules apply when creating a tape pool label:
• Tape pool names are limited in length to 63 characters. They may contain alphanumeric
characters, and in some cases, underscores (_) and dashes (-).
• Tape pool numbers are limited to eight hex digits. Valid characters for tape pool numbers are
0-9, A-F, and a-f.