Release Notes Device Mapper Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.2.0 (AA-RWF9G-TE, March 2009)

Installing HPDM Multipath Enablement kit 4.2.0
To install HPDM Multipath 4.2.0, complete the following steps:
1. Download the HPDM Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.2.0 available
at http://www.hp.com/go/devicemapper.
2. Log in as root to the host system.
3. Copy the installation tar package to a temporary directory (for instance, /tmp/HPDMmul-
tipath).
4. Unbundle the package by executing the following commands:
#cd /tmp/HPDMmultipath
#tar -xvzf HPDMmultipath-4.2.0.tar.gz
#cd HPDMmultipath-4.2.0
5. Verify that the directory contains README.txt, COPYING, INSTALL, bin, conf, SRPMS, and
docs directories.
6. To install HPDM Multipath 4.2.0, execute the following command:
#./INSTALL
Configuring Device Mapper Multipath to enable HP arrays
This section describes the following:
• Recommended device parameter values
• Setting up HPDM Multipath
• Setting up Device Mapper Multipath daemon
Recommended device parameter values
To enable HP arrays, edit /etc/multipath.conf file by adding the following under devices
section:
For MSA2012fc/MSA2212fc/MSA2012i
device
{
vendor "HP"
product "MSA2[02]12fc|MSA2012i"
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
hardware_handler "0"
path_selector "round-robin 0"
path_grouping_policy multibus
failback immediate
rr_weight uniform
no_path_retry 18
rr_min_io 100
path_checker tur
}
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