New In 8.0 - Utilization Computations; Compatibility/Interoperability; Version Requirements; Mixed San/Iq Software Versions In Clusters - HP LeftHand P4000 - SAN Solutions Release Note

New in 8.0 — Utilization Computations
The formulas for computing snapshot and volume utilization have changed to more accurately reflect
the amount of space being used on the SAN.
Pre-8.0 Utilization Formulas
Utilization was computed as
(Used Space of snapshot + Used Space of Temp Space) / (Provisionable Space
of snapshot + Provisionable Space of Temp Space).
8.0 Utilization Changes
Snapshot utilization is now calculated as the used space of the snapshot divided by the provisioned
space of the snapshot:
Used Space of snapshot / Provisioned Space of snapshot.
Volume utilization is calculated as the used space of the volume divided by the provisioned space of
the volume:
Used Space of volume / Provisioned Space of volume.
For thinly provisioned volumes, utilization will vary because the volume "autogrows" as data is written
to it. As utilization approaches 100%, the volume will autogrow and the utilization percent will
decrease. This pattern of increasing utilization, autogrow, and decreasing utilization repeats over
time and volume use.

Compatibility/Interoperability

For a complete list of supported SAN/iQ software releases and application software compatibility,
see the Customer Resource Center at www.LeftHandNetworks.com-> Services & Support->Software
Downloads->Products-> Compatibility Lists.

Version Requirements

To upgrade to Release 8.1 SAN/iQ software, the storage nodes must be at version 7.0 or later. If
the storage nodes are at a lower version, please contact Customer Support for access to the interim
upgrade files. Refer to
If you are upgrading to 8.1 from 7.x only, you must first ensure that the appropriate patches and
LSMD have been applied. See the Upgrade Flowcharts in the Upgrade Guide.
Required version of the Microsoft iSCSI Software Initiator - Version 2.08 (or greater)

Mixed SAN/iQ Software Versions in Clusters

Clusters can accommodate storage nodes running different versions of the SAN/iQ software. However,
you can only add storage nodes running a later software version to a cluster running an earlier
software version. For example, you can add a storage node running the 8.1 version software to a
cluster currently running the 7.0.0x software. You cannot add a storage node running 7.0.0x software
to a cluster running 8.1 software.
If you partially upgrade a cluster, the cluster will continue to run on the earlier software version until
the entire cluster is upgraded.
8 SAN/iQ Release Notes
HP technical supportfor customer support contact information.