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 4 149
2. You need the following information from these listings for each
Symmetrix logical device:
• HP-UX device file name (e.g. /dev/rdsk/c3t3d2).
• device type (R1, R2, BCV, GK, or blank)
• Symmetrix serial number (e.g. 50006161), useful in matching the
HP-UX device names to the actual devices in the Symmetrix
configuration downloaded by EMC support staff. This number is
further explained in Figure 4-15.
Figure 4-15Parsing the Symmetrix Serial Number
— The Symmetrix ID is the same as the last two digits of the
serial number of the Symmetrix frame, in this example 50.
— The next three hexadecimal digits are the unique Symmetrix
device number that is seen in the output of the status
command:
symrdf -g symdevgrpname query
and is used by the MetroCluster with Symmetrix SRDF
control script and saved in the file
/etc/cmcluster/package_name/symrdf.out. The contents
of this file may be useful for debugging purposes.
— The next three digits indicate the Symmetrix host adapter
(SA or FA) and port numbers; this is useful to see multiple
host links to the same Symmetrix device. For example, PV
links will show up as two HP-UX device file names with the
same device number, but with different host adapter and
port numbers.
50 006 161
}
} }
Symmetrix ID
unique device number
host adapter and port numbers