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Chapter 10 Setting Up and Checking the device-mapper multipath

10.2 For SLES

10.1.5

Checking the device-mapper multipath Status and Created Devices

Check the path status using the "multipath -ll" command.

•

When both paths are in normal status (This example is for the ETERNUS2000)

The multipath consists of the block device

names "sde" and "sdc". "mpath2" is created.

# multipath -ll

mpath2 (3600000e00d00000000000f7e00010000) dm-1 FUJITSU,E2000

[size=10G][features=1 queue_if_no_path][hwhandler=0][rw]

\_ round-robin 0 [prio=50][active]

\_ 4:0:0:1 sde 8:64 [active][ready]

\_ round-robin 0 [prio=10][enabled]

\_ 3:0:0:1 sdc 8:32 [active][ready]

10.2

For SLES

10.2.1

Editing "/etc/multipath.conf"

Edit the "/etc/multipath.conf" device-mapper multipath configuration file as follows:

Procedure

P3AM-4212-02ENZ0

ETERNUS2000 Disk storage systems Server Connection Guide (SAS) for Linux

Two block device names are

displayed for a two-path configuration.

Copy the "/usr/share/doc/packages/multipath-tools/multipath.conf.synthetic" file

to "/etc".

# cp /usr/share/doc/packages/multipath-tools/multipath.conf.synthetic

/etc/multipath.conf

Add the following lines to the file.

Add the following lines at the end of the "defaults" section.

defaults{

user_friendly_names yes

}

"E2000" is displayed since the

ETERNUS2000 is connected.

When the path status is normal,

"[active][ready]" is displayed.