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If you configure partitions for a device, DM-MP automatically recognizes the partitions and
indicates them by appending p1 to pn to the device's ID, such as
/dev/disk/by-id/26353900f02796769p1
To partition multipathed devices, you must disable the DM-MP service, partition the normal device
node (such as
), then reboot to allow the DM-MP service to see the new partitions.
/dev/sdc
5.4.3 Configuring the Server for Multipathing
The system must be manually configured to automatically load the device drivers for the controllers
to which the multipath I/O devices are connected within the
driver module to the variable INITRD_MODULES in the file
For example, if your system contains a RAID controller accessed by the
multipathed devices connected to a QLogic* controller accessed by the driver qla2xxx, this entry
would look like:
INITRD_MODULES="cciss"
Because the QLogic driver is not automatically loaded on start-up, add it here:
INITRD_MODULES="cciss qla23xx"
After having changed
/etc/sysconfig/kernel
with the command
mkinitrd
When you are using LILO as a boot manager, reinstall it with the command
action is required if you are using GRUB.
5.4.4 Adding multipathd to the Boot Sequence
Use either of the methods in this section to add multipath I/O services (
sequence.
"YaST" on page 55
"Command Line" on page 55
YaST
1 In YaST, click System > System Services (Runlevel) > Simple Mode.
2 Select multipathd, then click Enable.
3 Click OK to acknowledge the service startup message.
4 Click Finish, then click Yes.
The changes do not take affect until the server is restarted.
Command Line
1 Open a terminal console, then log in as the
2 At the terminal console prompt, enter
insserv multipathd
, you must re-create the
, then reboot in order for the changes to take effect.
user or equivalent.
root
. Therefore add the needed
INITRD
/etc/sysconfig/kernel
driver and
cciss
on your system
INITRD
/sbin/lilo
) to the boot
multipathd
Managing Multipath I/O for Devices
.
. No further
55
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Troubleshooting
