Hitachi Dynamic Link Manager Software Users Guide for Solaris

For details on how to change MISSCOUNT and DISKTIMEOUT, contact the
company with which you have a contract for Oracle Support Services.
Note that when you remove HDLM from the above configuration, you
must reset the values of MISSCOUNT and DISKTIMEOUT to their original
values. Therefore, make a note of the original values of MISSCOUNT and
DISKTIMEOUT before changing them.
• In Oracle RAC 10g, for the following devices, device name should be
matching between the nodes:
¢
voting disk
¢
Oracle Cluster Registry
¢
Oracle database file
¢
system table area
¢
users table area
¢
ASM disk to be used for ASM disk group creation
In an environment where an HDLM raw device is used as the devices
listed above, if the HDLM raw device name does not match between the
nodes, create an alias device file of the HDLM raw device in each node by
using the following procedure and set the created alias device file in
Oracle RAC 10g.
a. Check the major number and minor number of HDLM raw devices
used by Oracle RAC 10g by executing the following command in each
node:
# ls -lL HDLM-raw-device-file
Execution example:
# ls -lL /dev/rdsk/c10t50060E8005271760d5s0
crw-r----- 1 root sys 307, 1608 date/time /dev/rdsk/
c10t50060E8005271760d5s0
#
In this example, the major number is 307 and the minor number is
1608.
b. Create an alias device file by executing the following command in
each node. An alias device file corresponding to one disk slice should
have the same name in all the nodes.
# mknod /dev/alias-device-file c major-number minor-number
Note:
The name of the alias device file should not be duplicated with a
device file name created under the /dev directory by Solaris or other
drivers.
Execution example:
# mknod /dev/crs_ocr1 c 307 1608
#
In this example, a device file for RAC whose major number is 307 and
minor number is 1608 is created.
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Creating an HDLM Environment
Hitachi Dynamic Link Manager (for Solaris) User Guide