Hitachi XP P9500 User Manual page 151

Table 3-24 Formula for Calculating MISSCOUNT
Storage system type
• Hitachi AMS2000/AMS/WMS/
SMS series
• Thunder 9500V series
• Hitachi USP
• Lightning 9900V series
• Universal Storage Platform V/
VM
• Virtual Storage Platform
When using Oracle RAC 10g 10.2.0.2.0 or later or Oracle RAC 11g:
In addition to the value of MISSCOUNT shown above, also change the value
of DISKTIMEOUT. As with MISSCOUNT, the value to be specified in
DISKTIMEOUT is determined by the type of storage system. To make the
change, use the following table to obtain the value to be specified, and
then change the current value to a value equal to or greater than the
value you have obtained.
Table 3-25 Formula for Calculating DISKTIMEOUT
Storage system type
• Hitachi AMS2000/AMS/
WMS/SMS series
• Thunder 9500V series
• Hitachi USP
• Lightning 9900V series
• Universal Storage Platform
V/VM
• Virtual Storage Platform
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 uninstall 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.
Creating an HDLM Environment
Hitachi Dynamic Link Manager User Guide (for AIX(R))
Formula for obtaining the value of MISSCOUNT
number-of-paths-connected-to-the-voting-disk × 30
seconds
number-of-paths-connected-to-the-voting-disk × 60
seconds
Number
of paths
connecte Formula for obtaining the value of
d to the
voting
disk
6 or less You do not need to change the value of
DISKTIMEOUT.
7 or more number-of-paths-connected-to-the-
voting-disk × 30 seconds
3 or less You do not need to change the value of
DISKTIMEOUT.
4 or more number-of-paths-connected-to-the-
voting-disk × 60 seconds
DISKTIMEOUT
3-89