ExpressCluster X 2.0 for Windows Reference Guide - Nec

Section II Resource details
Understanding mirror disk resources
Example: Adding one SCSI disk to both servers to create two pairs of mirroring disks.
server1
• Allocate a cluster partition and two data partitions in a pair on a single disk.
• Assign 0 and 1 for the offset index of the cluster partition management area to be used in
each data partition.
Example: Adding two SCSI disks for both servers to create two mirroring partitions.
server1
Same drive name
Same partition size
Same drive name
Same partition size
Same drive name
Same partition size
Same drive name
Same partition size
server2
server2
Cluster partition
Data partition
(Index offset 0 of
cluster partition)
Data partition
(Index offset 1 of
cluster partition)
Cluster partition
Data partition (Index
offset 0 of cluster
partition)
Data partition (Index
offset 1 of cluster
partition)
• Secure a cluster partition and data partition on the first disk and a data partition on the
second disk.
• Routing and Remote AccessAssign 0 and 1 for the offset index of the cluster partition
management area to be used in each data partition.
• A cluster partition can be secured on each disk. In that case, the offset index is assigned
to be 0 and 0.
• When performing mirroring in the asynchronous mode, an access to a cluster partition is
generated in accordance with writing in a data partition. The access to a disk can be
distributed by securing a cluster partition and data partition on separate disks.
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