3PAR InForm Operating System 2.3.1 Release Notes (320-200178 Rev D, May 2010)

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InForm OS Version 2.3.1 3PAR InForm Operating System Release Notes
2.8 Known Issues with the InForm OS
2.8.1 4Gb/s 2-Port adapter Issue
The 4Gb/s 2-port Fibre Channel Adapter firmware does not detect a loss of sync when the host
reboots and has older adapters (ex: QLA2342) that do not turn off the laser.
 Workaround - None.
2.8.2 Downgrade Issues
The following are downgrade issues for InForm OS release 2.3.1.
2.8.2.1 Issues Preventing Downgrades
These issues will prevent an InServ Storage Server from downgrading from InForm OS release
2.3.1.
■ Dual SD Space - Thin Provisioned virtual volumes can have two Snap Data (SD) volumes in
2.3.1. This is not a supported feature in previous InForm releases. Prior to a downgrade,
dual SD TPVVs must be converted to single SD TPVVs by removing all of the snapshots for
those TPVVs.
■ Raid Multi-Parity (MP) - Raid MP was not supported in InForm OS releases prior to 2.3.1,
therefore any Raid MP Logical Disks (LDs) must be tuned to a supported RAID type or
removed prior to downgrade.
■ SD Reclaim Space - SD Reclamation is not supported by previous InForm OS releases. Prior
to a downgrade, SD volumes that has its space reclaimed must be removed. If that SD is
used by snapshots only, then all of its snapshots must be deleted so that SD can be freed. If
that SD space is used by the TPVV itself, then that TPVV would need to be copied over to a
new single SD TPVV. After the copy operation completed, the original TPVV can be
removed.
■ 256 Read/Write Snapshots - In InForm OS 2.3.1, the number of read/write snapshots was
increased to 256 per virtual volume. Previous release supported a smaller maximum number
of read/write snapshots per virtual volume. A downgrade will be prevented if any virtual
volume has more read/write snapshots than the maximum supported on the previous
release. When enough snapshots have been removed to meet this criterion the downgrade
is allowed.