Adding Devices To The Multipathing Database - Red Hat DEVICE-MAPPER MULTIPATH 5.2 Configuration And Administration Manual

Chapter 3. Setting Up DM-Multipath
The local disk or disks should no longer be listed in the new multipath maps, as shown in the
following example.
[root@rh4cluster1 ~]# multipath -F
[root@rh4cluster1 ~]# multipath -v2
create: 3600a0b80001327d80000006d43621677
[size=12 GB][features="0"][hwhandler="0"]
\_ round-robin 0
\_ 2:0:0:0 sdb
\_ 3:0:0:0 sdf
create: 3600a0b80001327510000009a436215ec
[size=12 GB][features="0"][hwhandler="0"]
\_ round-robin 0
\_ 2:0:0:1 sdc
\_ 3:0:0:1 sdg
create: 3600a0b80001327d800000070436216b3
[size=12 GB][features="0"][hwhandler="0"]
\_ round-robin 0
\_ 2:0:0:2 sdd
\_ 3:0:0:2 sdh
create: 3600a0b80001327510000009b4362163e
[size=12 GB][features="0"][hwhandler="0"]
\_ round-robin 0
\_ 2:0:0:3 sde
\_ 3:0:0:3 sdi

3. Adding Devices to the Multipathing Database

By default, DM-Multipath includes support for the most common storage arrays that support
DM-Multipath. The default configuration values, including supported devices, can be found in
the
multipath.conf.defaults
If you need to add a storage device that is not supported by default as a known multipath
device, edit the
/etc/multipath.conf
For example, to add information about the HP Open-V series the entry looks like this:
devices {
device {
vendor "HP"
product "OPEN-V."
getuid_callout "/sbin/scsi_id -g -u -p0x80 -s /block/%n"
}
}
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8:16
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8:32
8:96
8:48
8:112
8:64
8:128
file.
file and insert the appropriate device information.