EMC Qlogic QLA23xx - Manual (Page 74)

B
B-2 EMC Fibre Channel with QLogic HBAs in Windows Hosts
Troubleshooting
Problems and Solutions
Problem Error Message ID: 51 in event viewer when attempting to install
multiple host access (for clustering) to the same EMC CLARiiON
array storage group. The text of the message is:
An Error was detected on device \Device\Harddisk <x>\DR<x>
during a paging operation
Solution Until host cluster software is installed, only a single host should
access a storage group at a time. Refer to the EMC Support Matrix for
supported host configurations.
Problem EMC Primus case emc29097 — If using HBAs connected to both
CLARiiON SPs, without PowerPath installed, duplicate LUNs will be
visible in the Device Manager and Disk Manager. Only one instance
of the LUN will be accessible, and all other matching mappings will
be listed as Unknown, Unreadable and Unallocated.
Solution This is normal behavior when multiple paths are available,
PowerPath is not installed, and the initiator type is registered in
PowerPath mode (array default depending on core code revision).
Problem EMC Primus case emc69307 — When using QLogic HBAs in a
Brocade fabric environment, after upgrading Brocade 3900-series
switch firmware to 3.0.2m, the HBAs report repeated link errors, and
intermittently lose fabric connectivity.
PowerPath may report paths lost and then found in quick succession,
and repeated Windows 2000 event log error entries for Link
Down/Link Up events similar to the following:
Event ID: 11
Source: ql2300
Description: The driver detected a controller error on \Device\Scsi\ql2300x.
Data (words): offset 34 = 80120000 [ErrorCode: Link down error]
Event ID: 11
Source: ql2300
Description: The driver detected a controller error on \Device\Scsi\ql2300x.
Data (words): offset 34 = 80110000 [ErrorCode: Link up]