Red Hat DEVICE-MAPPER MULTIPATH 5.2 Instrukcja Użytkownika Pobierz pdf (Strona 16)

3.2.2 Checking the device-mapper multipath Status and Created Devices

Check the path status using the "multipath -ll" command. Check that the recognized status of the devices for

all the paths that are assigned to the server is normal.

•

Multipath is in normal status (This example shows when two paths are used to connect to the ETERNUS

DX80)

Check that multipathing is configured in the two block devices and "active ready" is displayed for each path

status.

# multipath -ll

mpath2 (3600000e00d00000000000f7e00010000) dm-1 FUJITSU,ETERNUS_DXL

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

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

When the path status is normal,

"[active][ready]" is displayed.

Two block device names are displayed

for a two-path configuration.

•

Multipath (the "3:0:0:X" side) is in error status (This example shows when two paths are used to connect to

the ETERNUS DX80)

# multipath -ll

mpath2 (3600000e00d00000000000f7e00010000) dm-1 FUJITSU,ETERNUS_DXL

[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=0][enabled]

\_ 3:0:0:1 sdc 8:32 [failed][faulty]

The status for the failed path

is "[failed][faulty]".

Chapter 3 For Red Hat Enterprise Linux 5

3.2 Checking the device-mapper multipath

FUJITSU Storage ETERNUS DX Configuration Guide -Server Connection-

(Fibre Channel/FCoE/iSCSI/SAS) for Linux

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