User guide

7.2 DM-MULTIPATH COMPONENTS

The dm-multipath kernel module –

Provides control over paths and priorities.

The multipath daemon (multipathd) –

Used by the Linux kernel to monitor and control the multipath paths.

The multipath command –

Utilized by the user to manipulate (view, flush cached entries…) multipath devices.

The /etc/multipath.conf file –

The configuration file read by multipathd to describe the behaviors and attributes of

multipath devices.

The reader is encouraged to reference the man pages for these: multipath, multipathd,

multipath.conf, kpartx, dmsetup, mpath_prio_alua

7.3 DDN MULTIPATH RPM CONTENT

Enhancements to the /etc/multipath.conf, that defines the correct multipath settings

for a DDN disk arrays

An optimized prioritizer for the SFA 10000 capable of optimizing path priorities for all

four of the SFA 10000’s Raid Processors (RP’s) by priority group.