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4.2.2 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
DX410)
Check that multipathing is configured in the two block devices and "active ready" is displayed for each path
status.
# multipath -ll
mpathb (36000b5d0006a0000006a0317000a0000) dm-2 FUJITSU,ETERNUS_DX400
size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=150 status=active
|- 3:0:0:1 sdc 8:32 active ready running
`- 4:0:0:1 sde 8:64 active ready running
:
:
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 DX410)
# multipath -ll
mpathb (36000b5d0006a0000006a0317000a0000) dm-2 FUJITSU,ETERNUS_DX400
size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=150 status=active
`- 4:0:0:1 sde 8:64 active ready running
:
:
The status for the failed path may
not be displayed depending on the
OS version.
Chapter 4 For SUSE Linux Enterprise Server 12 or SUSE Linux Enterprise Server 11
4.2 Checking the device-mapper multipath
21
FUJITSU Storage ETERNUS DX Configuration Guide -Server Connection-
(Fibre Channel/FCoE/iSCSI/SAS) for Linux
Copyright 2015 FUJITSU LIMITED
P3AM-3912-21ENZ0
- FUJITSU Storage 1
- ETERNUS DX 1
- 21st Edition 3
- April 2015 3
- Table of Contents 5
- Chapter 1 7
- Workflow 7
- Chapter 2 8
- # service multipathd start 10
- # service multipathd reload 10
- # shutdown -r now 10
- # multipath -ll 12
- Chapter 3 13
- Reboot the Linux server 15
- Example: 15
- Chapter 4 17
- Enterprise Server 11 17
- 1 Create an initial RAM disk 19
- OS version 21
- Chapter 5 22
- Two block device names are 25
- 5.2.1.1 Preparation 26
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