Thin Provisioned Luns - Brocade Communications Systems StoreFabric SN6500B Administrator's Manual

Thin provisioned LUNs

With the introduction of Fabric OS 7.1.0, the Brocade Encryption Switch can discover if a disk LUN
is thin provisioned LUN. Support for a thin provisioned LUN is limited to disk containers only.
NOTE
Currently, thin provisioned LUN support is limited to Brocade-tested storage arrays. The thin
provisioned LUN status will be displayed as Yes for supported storage arrays running specific
supported firmware versions only. Contact your service representative to determine if your storage
array is supported.
Thin provisioned LUNs rely on on-demand allocation of blocks of data, instead of the traditional
method of allocating all blocks up front. If a thin provisioned LUN status is shown as Yes, then
first-time encryption and rekey are done on the allocated blocks only, which results in the
provisioned region of the LUN remaining the same after the rekey is performed.
Thin provisioned LUN support requires no action by the user; the Brocade Encryption Switch can
automatically detect if a LUN is a thin provisioned LUN. You can, however, identify a thin provisioned
LUN using the following commands.
NOTE:
•
•
•
Fabric OS Encryption Administrator's Guide (SKM/ESKM)
53-1002721-01
cryptocfg show –container
–-
cryptocfg discoverLUN
–-
cryptocfg show rekey
-- -
cryptocfg show –LUN tpdisk 0 10:00:00:00:c9:29:0f:01 –stat
–-
If a LUN is a thin provisioned LUN, TP LUN status is shown as Yes. (Thin provision support is
limited to Brocade-tested storage arrays. The thin provisioned LUN status will be displayed as
Yes for supported storage arrays only.)
If a LUN is not a thin provisioned LUN or if thin provisioning is not supported with the LUN, LUN
status is shown as No. (This can be a result of the array not supporting thin provisioning, or the
Brocade Encryption Switch/blade does not support the thin provisioning features of the array.
Refer to the Fabric OS release notes for supported arrays.)
If LUN status cannot be determined, LUN status is shown as Unknown.
FabricAdmin:switch> cryptocfg –-show –container –all –stat
LUN number:
LUN type:
LUN serial number:
Encryption mode:
Encryption format:
Encrypt existing data:
Rekey:
Internal EE LUN state:
Encryption algorithm:
Key ID state:
New LUN:
TP LUN: Yes
Key ID:
Key creation time:
FabricAdmin:switch> cryptocfg –discoverLUN -container
Host:
LUN number:
all –stat
–
container
-
all
–
0xd
disk
50002AC000BC0A50
encrypt
native
disabled
disabled
Encryption enabled
AES256-XTS
Read write
No
4b:d9:4d:12:93:67:0e:0d:d1:e0:ca:aa:ba:34:29:db
Thu Sep 15 18:01:01 2011
21:00:00:e0:8b:90:7c:c0
0xd

Thin provisioned LUNs

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