Device Mapper Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.2.1 release notes (AA-RWF9H-TE, March 2009)

• Configuring Emulex HBA parameters
• Configuring iSCSI parameters
Configuring QLogic HBA parameters
To configure the QLogic HBA parameters for QLogic 2xxx family of HBAs, complete the following
steps:
1. Edit the /etc/modprobe.conf.local file in SLES hosts with the following value:
options qla2xxx ql2xmaxqdepth=16 qlport_down_retry=10 ql2xloginretry-
count=30
2. Rebuild the initrd by completing the following steps:
a. Backup the existing initrd image by executing the following command:
#mv /boot/initrd-<version no.>.img /boot/initrd-<version
no.>.img.old
b. Make a new initrd image by executing the following command:
#mkinitrd
3. Reboot the host.
Configuring Emulex HBA parameters
To configure the Emulex HBA parameters, complete the following steps:
1. For Emulex lpfc family of HBAs, edit the /etc/modprobe.conf.local file with the following
values:
options lpfc
lpfc_nodev_tmo=28
lpfc_lun_queue_depth=16
lpfc_discovery_threads=32
2. Rebuild the initrd by completing the following steps:
a. Backup the existing initrd image by executing the following command:
#mv /boot/initrd-<version no.>.img /boot/initrd-<version
no.>.img.old
b. Make a new initrd image by executing the following command:
#mkinitrd
3. Reboot the host.
Configuring iSCSI parameters
To configure the iSCSI parameters, complete the following steps:
1. Update the iSCSI configuration file
• Edit the /etc/iscsi/iscsid.conf file with the following value:
node.session.timeo.replacement_timeout=10
2. Restart the iSCSI service using the following command:
#/etc/init.d/open-iscsi restart
Device Mapper Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.2.1 release notes 9