Device Mapper Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.4.0 release notes (AA-RWF9K-TE, February 2010)

• If an existing LUN is deleted or unpresented from RHEL host, a DM multipath device with the invalid

WWN may be created which cannot be used and will be removed after the system reboots.

• For LUNs greater than 2TB in RHEL 4 operating systems, DM multipath devices may not be created

with appropriate size.

• On RHEL 4 operating systems with large number of iSCSI devices, not all multipath devices may

get created after a reboot. It is recommended to increase the ESTABLISHTIMEOUT value in the

/etc/sysconfig/iscsi file depending on the number of LUNs, or run the multipath -v0

command after the reboot.

• On SLES 11 operating systems:

• Multipath may not always activate all partitions on reboot.

• The multipathd daemon may fail to stop immediately after it is started in large SAN config-

urations.

• The multipathd daemon may consume more memory in large SAN configurations.