To Disable Multipathing In Linux - Sun Microsystems J4200 System Overview Manual

7. Start the multipathd daemon.
For Linux SUSE 9, use the following command:
# multipathd -v0
For other supported Linux versions, use the following command:
# service multipathd start
8. Start the multipathing device mapper target autoconfig.
# multipath -v2
9. List the multipath devices that have been created.
# multipath -ll
The output should list the same number of devices as there are disks in the
J4200/J4400 arrays; it will look similar to the following:
35000c5000357625bdm-2 SEAGATE,ST340008SSUN0.4
[size=373G][features=0][hwhandler=0]

▼ To Disable Multipathing in Linux

1. If a RAID volume, LVM volume, or volume mount have been placed over the
device node of the multipathed disk, quiesce the volume.
2. Use the multipath -f command to disable multipathing to a specific device.
multipath -f mpath1
3. Use the multipath -F command to disable multipathing on all multipathed
devices.
multipath -F
Note – If the message map in use appears for a device when you attempt to
disable multipathing, the device is still in use. You must unmount or otherwise
quiesce the device before you can disable multipathing. If you cannot quiesce the
device, edit the /etc/multipath.conf file to exclude the device and then reboot
the server.
78 Sun Storage J4200/J4400 Array System Overview • June 2009
\_ round-robin 0 [prio=2][active]
\_ 0:0:0:0 sda 8:0
\_ 1:0:0:0 sdm 8:192
[active][ready]
[active][ready]