Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Building a Metropolitan Cluster Using MetroCluster/SRDF
Preparing a Cluster for MetroCluster/SRDF
Chapter 4 151
4. Match the logical device numbers in the symrdf listings with the
HP-UX device file names in the output from the syminq command to
see which devices are seen from each node to make sure that this
node can see all necessary devices.
Use the Symmetrix ID to determine which Symmetrix array is
connected to the node. Then use the Symmetrix device number to
determine which devices are the same logical device seen by each
node that is connected to the same Symmetrix unit. Record the
HP-UX device file names in your table.
Table 4-6 show a partial mapping for a 4 node cluster connected to
two Symmetrix arrays (95 and 50). Note that you may have many R1
and R2 devices and many gatekeepers for each package, so this table
will be much larger for most clusters. Also, with M by N
configurations, the number of devices increases according to the
number of Symmetrix frames.
Table 4-6 Symmetrix Device and HP-UX Device Correlation
Symmetrix
ID, device
#, and type
Node 1
/dev/rdsk
device file
name
Node 2
/dev/rdsk
device file
name
Node 3
/dev/rdsk
device file
name
Nodes 4
/dev/rdsk
device file
name
ID 95 c0t4d0
Dev# 005 c6t0d0
Type R1
ID 50 c4t0d0
Dev# 014 c0t4d0
Type R2
ID 95 c0t2d2
Dev# 00A c0t4d2
Type R2
ID 50 c3t0d2
Dev# 012 c4t3d2