HP EVA P6000 Release Note page 6

Fixed an issue where a controller can experience a processor exception termination when two
drive failures occur in a narrow window while executing a Vraid5 write with multiple failed drives.
Fixed an issue that can result in a recursive controller termination (termination code 0x071a0100)
or incomplete leveling activity under rare circumstances.
Fixed the cache prefetching algorithm to prevent multiple watchdog timer terminations
(0x0420011f, 0x04800106) from occurring.
Disks (disk groups, virtual disks)
This section describes issues affecting physical and virtual disks or disk groups, which can lead to a
range of behaviors including a loss of redundancy, performance impact, or data unavailability.
Added protection to prevent dual controller restarts when invalid mirror data is detected.
An issue was fixed when the mirror connection breaks during certain operations. An outstanding
proxy command to the other controller, targeting the unit being quiesced, made it possible to
encounter a deadlock condition leading to an inoperative or unresponsive state.
Improved data pre-fetch algorithm to address a problem where high I/O latencies result from
sequential read streams involving non-uniform transfer requests.
Fixed an issue which blocked I/O module status data from being reported during controller startup
logging.
Fixed an issue where the controller software did not handle Cache Data Lost (CDL) LUN failover
correctly when a device data lost (DDL) condition was resolved.
Fixed issue that allowed change tracking metadata to be set on four disks in a single disk enhanced
disk group, resulting in a false inoperative condition after a power failure.
Fixed an issue where the array failed to correctly split a background parity structure following
the addition of a twelfth member.
Fixed a resource contention deadlock that occurred when rebuilding parity.
Fixed an issue where leveling would stall after two 1 TB drives are added to the system.
Fixed a rare recursive controller resynchronization that could occur when a virtual disk being
expanded had errors.
Added functionality to ensure that the leveling process did not miss any outstanding work caused
by a background parity structure reconfiguration.
Fixed controller resource starvation issues that could occur under heavy workloads when disks
failed.
Fixed an issue that, in certain circumstances, occurred during a LUN shrink, expand, or delete
operation, and cause the controllers to recursively resynchronize.
Hardware (replaceable parts, device ports, resynchronization)
This section describes issues affecting physical hardware, which can lead to incorrect condition
handling, false condition reporting and similar events that may lead to incorrect device status reporting
or replacement.
Fixed a controller power up diagnostics issue that incorrectly logged a real time clock failure.
Created a new critical event to alert field personnel to check or replace the disk enclosure power
supply when a failure condition is encountered.
Improved the back-end device discovery model to address several known issues, including a
situation where controllers may terminate during back-end error handling (force LIP failure).
Fixed an issue that blocked communication between the two I/O modules within a single disk
enclosure.
6 Fixes (XCS 10000000)