6–Boot from SAN Configuration
iSCSI Boot from SAN
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16. Reboot the server and boot into the OS with multipath.
Migrating and Configuring MPIO to Offloaded Interface for SLES 11 SP4
To migrate from L2 to L4 and configure MPIO to boot the OS over an
offloaded interface for SLES 11 SP4:
1.
Follow all the steps necessary to migrate a non-offload (L2) interface to an
offload (L4) interface, over a single path. See
Migrating to Offload iSCSI for
.
2.
After you boot into the OS using the L4 interface, prepare multipathing as
follows:
a.
Reboot the server and open the UEFI HII by going to
System
Setup/Utilities
.
b.
In the UEFI HII, select
System Configuration
, and select the second
adapter port to be used for multipath.
c.
On the Main Configuration Page under
Port Level Configuration
, set
Boot Mode
to
iSCSI (HW)
and enable
iSCSI Offload
.
d.
On the Main Configuration Page under
iSCSI Configuration
, perform
the necessary iSCSI configurations.
e.
Reboot the server and boot into OS.
3.
Set MPIO services to remain persistent on re-boot as follows:
#
chkconfig multipathd on
#
chkconfig boot.multipath on
#
chkconfig boot.udev on
4.
Start multipath services as follows:
#
/etc/init.d/boot.multipath start
#
/etc/init.d/multipathd start
5.
Run
multipath –v2 –d
to display multipath configuration with a dry run.
6.
Locate the
multipath.conf
file under
/etc/multipath.conf
.
NOTE
\
For any additional changes in the
/etc/multipath.conf
file to take effect,
you must rebuild the initrd image and reboot the server.