Determining Device Mapper Entries With The Dmsetup Command; Troubleshooting With The Multipathd Interactive Console - Red Hat DEVICE-MAPPER MULTIPATH 5.2 Configuration And Administration Manual

Option
-l
-ll
-f device
-F
Table 5.1. Useful
4. Determining Device Mapper Entries with the dmsetup
Command
You can use the
dmsetup
multipathed devices.
The following command displays all the device mapper devices and their major and minor
numbers. The minor numbers determine the name of the dm device. For example, a minor
number of 3 corresponds to the multipathed device
# dmsetup ls
mpath2 (253, 4)
mpath4p1
mpath5p1
mpath1 (253, 3)
mpath6p1
mpath7p1
mpath0 (253, 2)
mpath7 (253, 9)
mpath6 (253, 8)
VolGroup00-LogVol01
mpath5 (253, 7)
VolGroup00-LogVol00
mpath4 (253, 6)
mpath1p1
mpath3 (253, 5)
5. Troubleshooting with the multipathd Interactive
Console
The command is an interactive interface to the
multipathd -k
this command brings up an interactive multipath console. After entering this command, you can
Description
Display the current multipath configuration gathered from
and the device mapper.
Display the current multipath configuration gathered from
the device mapper, and all other available components on the
system.
Remove the named multipath device.
Remove all multipath devices.
Command Options
multipath
command to find out which device mapper entries match the
(253, 12)
(253, 11)
(253, 14)
(253, 13)
(253, 1)
(253, 0)
(253, 10)
Determining Device Mapper Entries with the
.
/dev/dm-3
multipathd
sysfs
,
sysfs
daemon. Entering
31