User's Guide

Figure 41 Sample syminq Output from a Node on the R2 Side
2. The following information is needed from these listings for each Symmetrix logical device:
• HP-UX device file name (for example, /dev/rdsk/c3t3d2).
• Device type (R1, R2, BCV, GK, or blank)
• Symmetrix serial number (for example, 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 42.
Figure 42 Parsing 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 example50.
◦ 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
This 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.
3. Use the symrdf command on each Symmetrix disk array (that is, from both the R1 and the
R2 side) to pair the logical device names for the R1 and R2 sides of each SRDF link:
# symrdf list
Sample output is shown in Figure 43 and Figure 44.
NOTE: The format of output varies depending on the symrdf version.
Sample symrdf list Output from R1 Side
Symmetrix ID: 000187400684
Local Device View
Preparing the Cluster for Data Replication 259