6–Boot from SAN Configuration
iSCSI Boot from SAN
107
AH0054602-00 J
7.
Edit the
multipath.conf
to enable the default section.
8.
Rebuild initrd image to include MPIO support:
#
mkinitrd –f multipath
9.
Reboot the server and boot the OS with multipath support.
Migrating and Configuring MPIO to Offloaded Interface for SLES 12 SP1/SP2
To migrate from L2 to L4 and configure MPIO to boot the OS over an
offloaded interface for SLES 12 SP1/SP2:
1.
Configure the iSCSI boot settings for L2 BFS on both ports of the adapter.
The boot will log in through only one port, but will create an iSCSI Boot
Firmware Table (iBFT) interface for both ports.
2.
While booting to the CD, ensure that you specify the following kernel
parameters:
dud=1
rd.iscsi.ibft
3.
Provide the DUD and complete the installation.
4.
Boot to the OS with L2.
5.
Update the Open-iSCSI tools by issuing the following commands:
#
rpm -ivh qlgc-open-iscsi-2.0_873.111.sles12sp1-3.x86_64.rpm --force
#
rpm -ivh iscsiuio-2.11.5.5-6.sles12sp1.x86_64.rpm --force
6.
Edit the
/etc/default/grub
file by changing the
rd.iscsi.ibft
parameter to
rd.iscsi.firmware
, and then save the file.
7.
Issue the following command:
#
grub2-mkconfig -o /boot/efi/EFI/suse/grub.cfg
NOTE
\
If the file is not present, copy
multipath.conf
from the
/usr/share/doc/packages/multipath-tools
folder:
cp /usr/share/doc/packages/multipath-tools/multipath.
conf.defaults /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.