Space reclamation – Brocade Fabric OS Encryption Administrator’s Guide Supporting Key Management Interoperability Protocol (KMIP) Key-Compliant Environments (Supporting Fabric OS v7.1.0) User Manual

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Fabric OS Encryption Administrator’s Guide (KMIP)

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Thin provisioned LUNs

3

Encryption algorithm: AES256-XTS
Key ID state: Read write
New LUN: No
TP LUN: Yes
Key ID: 4b:d9:4d:12:93:67:0e:0d:d1:e0:ca:aa:ba:34:29:db
Key creation time: Thu Sep 15 18:01:01 2011

FabricAdmin:switch> cryptocfg –discoverLUN -container

Host: 21:00:00:e0:8b:90:7c:c0
LUN number: 0xd
LUN serial number: 50002AC000BC0A50
TP LUN:

Yes

LUN connectivity state: Connected
Key ID state: Key ID not Applicable

FabricAdmin:switch> cryptocfg --show -rekey –all

LUN number: 0x0
LUN serial number: 50002AC002E70A50
TP LUN:Yes
Rekey session number: 0
Percentage complete: 98
Rekey state: Read Phase
Rekey role: Primary/Active
Block size: 512
Number of blocks: 4194304
Current LBA: 4141617

FabricAdmin:switch> cryptocfg –-show –LUN tpdisk 0 10:00:00:00:c9:29:0f:01 –
stat

LUN number: 0x0
LUN type: disk
LUN serial number: 50002AC002E70A50
TP LUN:Yes
Encryption mode: encrypt
Encryption format: native
Encrypt existing data: disabled
Rekey: disabled
Internal EE LUN state: Encryption enabled
Encryption algorithm: AES256-XTS
Key ID state: Read write
New LUN: No
Key ID: d3:a6:de:b9:67:26:04:fa:b9:83:e1:c7:cf:ae:f1:9c
Key creation time: Fri Feb 17 03:41:54 2012

Space reclamation

When a block that was provisioned is no longer needed, it can be reclaimed. The Brocade
Encryption Switch supports following methods to reclaim the provisioned blocks:

Sending the UNMAP SCSI command

Sending WRITE_SAME SCSI command with only UNMAP bit set.

Note the following limitations:

Space reclamation is not allowed during rekey.

The Host will get garbled data while trying to read an unmapped region.

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