Release Notes Device Mapper Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.1.
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Overview This release notes discusses the recent product information about HP Device Mapper Multipath (HPDM Multipath) Enablement Kit for HP StorageWorks Disk Arrays v4.1.1. This incremental release is to provide enablement for HP StorageWorks Disk Arrays MSA2312fc/MSA2324fc and to support RedHat Enterprise Linux (RHEL) 5 Update 3 operating system.
What's new HPDM Multipath 4.1.1 provides the following additional features: • Provides support for RHEL 5 U3 operating system distributions. • Provides support for HP StorageWorks Disk Arrays MSA2312fc and MSA2324fc. • Supports the native Qlogic and Emulex HBA drivers provided with RHEL 5 U3. NOTE: For operating systems supported with HP StorageWorks Disk Arrays, refer the support matrix section in the respective Disk Array manual. For the HBA driver parameters on RHEL 5 U3, see Setting up HPDM Multipath.
EVA 4000 (HSV200) XCS 5.110/6.100 or later EVA 6000 (HSV200) XCS 5.110/6.100 or later EVA 8000 (HSV210) XCS 5.110/6.100 or later EVA 4100 (HSV200) XCS 6.110 or later EVA 6100 (HSV200) XCS 6.110 or later EVA 8100 (HSV210) XCS 6.110 or later EVA 4400 (HSV300) XCS 0900 or later EVA iSCSI Connectivity Option Supported arrays XP10000 fw rev 50-07-30-00/00 or later XP12000 fw rev 50-09-34-00/00 or later XP 20000 fw rev 60-02-04-00/00 or later XP 24000 fw rev 60-02-04-00/00 or later MSA 1000/MSA 1500 fw rev 7.0.
Installing Device Mapper Multipath tools Ensure the following RPMs bundled with the operating system distributions are installed on the system: • For RHEL 5 Update 3: device-mapper-1.02.28-2.el5 or later, ddevice-mapper-multipath-0.4.723.el5 or later NOTE: For RHEL 4 U6/SLES 9 SP3/SLES 10 SP1 operating systems, install HP Device Mapper Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.0.0 and then install HPDM Multipath v4.1.1. For more information on installing HPDM Multipath v4.0.
Installing HPDM Multipath Enablement kit 4.1.1 To install HPDM Multipath 4.1.1, complete the following steps: 1. 2. Download the HPDM Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.1.1 available at http://www.hp.com/go/devicemapper. Log in as root to the host system. 3. Copy the installation tar package to a temporary directory (for instance, /tmp/HPDMmultipath). 4. Unbundle the package by executing the following commands: #cd /tmp/HPDMmultipath #tar -xvzf HPDMmultipath-4.1.1.tar.
For EVA3000/EVA5000/EVA4x00/EVA6x00/EVA8x00 device { vendor product getuid_callout prio_callout hardware_handler path_selector path_grouping_policy failback rr_weight no_path_retry rr_min_io path_checker "(COMPAQ|HP)" "HSV1[01]1|HSV2[01]0|HSV300" "/sbin/scsi_id -g -u -s /block/%n" "/sbin/mpath_prio_alua /dev/%n" "0" "round-robin 0" group_by_prio immediate uniform 12 100 tur } For MSA1000/MSA1500 device { vendor product getuid_callout prio_callout hardware_handler path_selector path_grouping_policy failba
For MSA2012sa device { vendor product getuid_callout prio_callout hardware_handler path_selector path_grouping_policy failback rr_weight no_path_retry rr_min_io path_checker "HP" "MSA2012sa" "/sbin/hp_scsi_id -g -u —n —s /block/%n" "/sbin/mpath_prio_alua %d" "0" "round-robin 0" group_by_prio immediate uniform 18 100 tur vendor product getuid_callout hardware_handler path_selector path_grouping_policy failback rr_weight no_path_retry rr_min_io path_checker "HP" "OPEN-.
NOTE: • For SLES 10 SP2, in the device section, replace prio_callout “/sbin/mpath_prio_alua %d” with prio alua • For SLES 10 SP2, in the device section for MSA 2012sa, replace getuid_callout “/sbin/hp_scsi_id —g —u —n —s /block/%n” with getuid_callout “/sbin/scsi_id —g —u —n —s /block/%n” • For more information on editing /etc/multipath.conf, see the Device Mapper Multipath Enablement Kit for HP StorageWorks Disk Arrays 4.0.0 Installation and Reference Guide.
a. Backup the existing initrd image by executing the following command: #mv /boot/initrd-.img /boot/initrd-.img.old b. Make a new initrd image by executing the following command: #mkinitrd /boot/initrd-.img `uname -r` c. Edit the value for default parameter in /boot/grub/menu.lst file to boot with the new initrd image. • For other operating systems using the HP Qlogic drivers, /opt/hp/src/hp_qla2x00src/make_initrd 3. Reboot the host.
/opt/hp/hp-lpfc/make_initrd 3. Reboot the host. NOTE: Ensure you have a HBA driver installed in single path mode. For more information, see the installation and reference guides for the respective HBA drivers. Configuring iSCSI parameters To configure the iSCSI parameters, complete the following steps: 1. Update the iSCSI configuration file • In RHEL 5 and SLES10 hosts, edit the /etc/iscsi/iscsid.conf file with the following value: node.session.timeo.
Known issues Following are the known issues in the HPDM Multipath 4.1.1 release: • Path failure messages are seen in the log file when encountered with a Unit Attention condition. This behavior could be observed during online LUN addition, deletion, LUN transition across the controller. These paths would be recovered after the polling interval set. • multipath commands may take longer time to execute on heavily loaded servers or under path failure conditions.
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