Brocade Network Advisor SAN + IP User Manual v12.3.0 - Manual (Page 1214)

1142 Brocade Network Advisor SAN + IP User Manual
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Thin provisioned LUNs
25
• Thin Provision LUN: Identifies if the new LUN is a thin provisioned LUN. Options are:
- Yes: Thin provision support is limited to Brocade-tested storage arrays. The thin
provision LUN status will be displayed as Yes for supported storage arrays only.
- No: Shown as No if the LUN is not a thin provisioned LUN.
- Unknown: Shown if the LUN status cannot be determined.
- Not Applicable: Applies to Brocade Encryption Switchswitches that are running a
Fabric OS version earlier than v7.1.0.
3. Click Refresh periodically to update the display.
Thin provisioned LUNs
With the introduction of Fabric OS 7.1.0, the Brocade Encryption Switchswitch can discover if a disk
LUN is a thin provisioned LUN. Support for a thin provisioned LUN is limited to disk containers only.
Thin provisioned LUNs can be created with the new LUN option.
NOTE
Currently, thin provisioned LUN support is limited to Brocade-tested storage arrays running specific
supported firmware releases. The thin provisioned LUN status will be displayed as Yes for supported
storage arrays only.
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 to remain the same after the rekey is performed.
Thin provisioned LUN support requires no action by the user. The Brocade Encryption Switchswitch
can automatically detect if a LUN is a thin provisioned LUN.
NOTE:
• For thin provisioned LUNs that were previously full provisioned then converted to thin, a
discoverLUN command must be performed prior to any rekeying operations. Failure to do so
results in the full capacity of the LUN to be encrypted as if it were not thin provisioned.
Updated thin provisioned status can be verified using the cryptocfg
--
show
-
container
-
all
-
stat command and checking the output for “
Thin Provision LUN: Yes
”. Similarly, if a thin-
to full-LUN conversion has been performed, a discoverLUN command must be performed for
this LUN change to reflect on the Brocade Encryption Switchswitch or FS8-18 blade.
• If a LUN is a thin provisioned LUN, 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 Switchswitch or 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.
• If you are running a Fabric OS version earlier than v7.1.0, LUN status is shown as Not
Applicable.
• Zero detect with encryption is not supported.