If you perform the mirroring among servers, you need to set the target disk device to be accessed from each node as the iSCSI device before the setting of "6.3 Shared Disk Resource Registration."
This example is described based on the configuration indicated in the following figure.
Figure 4.1 Disk setting for Performing Mirroring among Servers
By setting this configuration, the target disk device can be accessed from each node just like the shared disk device.
Note
The iSCSI target created for each node must be only one.
As shown in the figure above, each disk can be accessed from all nodes in the same iSCSI device name. However, a different iSCSI device name for each node may be assigned to the identical disk. For how to check the iSCSI device name, refer to "4.8.5 Confirming the Correspondence of iSCSI Device Name of Each Node."
The above figure indicates the example when mirroring the physical disk "sdc." It is also possible to mirror not a physical disk but a partition (such as "sdc2"). When mirroring a partition, confirm the partition configuration (the partition number and the size) to record it by using the parted command. The information is necessary for swapping the disk.
The physical disk (sdc in the above figure) must be described in the Excluded Device List. For details on the Excluded Device List, see "6.1 Creating Excluded Device List."
