Creating a Shared Virtual Disk for HA
High Availability 9-5
# iscsiadm -m node -p 10.2.1.250:3260,4 -T
iqn.1992-04.com.emc:cx.apm00070202838.b1 -o delete
# iscsiadm -m node -p 10.1.1.249:3260,2 -T
iqn.1992-04.com.emc:cx.apm00070202838.a1 -o delete
# iscsiadm -m node -p 10.0.1.249:3260,5 -T
iqn.1992-04.com.emc:cx.apm00070202838.a2 -o delete
5. Verify that only the iSCSI targets you want to use for the server pool are visible:
# iscsiadm -m node
6. Review the partitions by checking /proc/partitions:
# cat /proc/partitions
major minor #blocks name
8 0 71687372 sda
8 1 104391 sda1
8 2 71577607 sda2
253 0 70516736 dm-0
253 1 1048576 dm-1
7. Restart the iSCSI service:
# service iscsi restart
8. Review the partitions by checking /proc/partitions. A new iSCSI device (for
example, sdb) is listed. Determine the share disk volume you want to use and
create the desired partitions (for example, /dev/sdb1) using the fdisk command.
# cat /proc/partitions
major minor #blocks name
8 0 71687372 sda
8 1 104391 sda1
8 2 71577607 sda2
253 0 70516736 dm-0
253 1 1048576 dm-1
8 16 1048576 sdb
9. Format the shared virtual disk from any of the Oracle VM Servers in the cluster.
For example, to create an OCFS2 partition with a 4k block size, 4k cluster size,
64MB journal size, and 16 node slots:
# mkfs.ocfs2 -L mylabel -b 4K -C 4K -J size=64M -N 16 /dev/sdb1
9.2.2 Creating a Shared Virtual Disk Using OCFS2 on SAN
To create a shared virtual disk using OCFS2 on SAN:
1. Review the partitions by checking /proc/partitions. Determine the share disk
volume (for example, sdb) you want to use and create the desired partitions (for
example, /dev/sdb1) using the fdisk command:
# cat /proc/partitions
major minor #blocks name
8 0 71687372 sda
8 1 104391 sda1
8 2 71577607 sda2
253 0 70516736 dm-0
253 1 1048576 dm-1
8 16 1048576 sdb
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