HP XP P9500 Storage - Manual (Page 161)

Table 3-23 Formula for Calculating DISKTIMEOUT
Storage system type
Number
of paths
connecte
d to the
voting
disk
Formula for obtaining the value of
DISKTIMEOUT
• Hitachi AMS2000/AMS/
WMS/SMS series
• HUS100 series
• Thunder 9500V series
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
• Hitachi USP series
• Lightning 9900V series
• Universal Storage Platform
V/VM series
• Virtual Storage Platform
series
• HUS VM
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
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.
Settings for Reservation Policy
When you set up an Oracle RAC environment, if you specify the hdisk for an
HDLM-managed device as a disk used by Oracle RAC, use the procedure
below to check the value of the reserve_policy attribute. If
reserve_policy is set to PR_exclusive, change its value to no_reserve.
1
.
Check the setting for the reserve_policy attribute of the hdisk.
# lsattr -El hdisk-name -a reserve_policy
reserve_policy PR_exclusive N/A TRUE
Perform the following procedure if reserve_policy is set to
PR_exclusive:
2
.
Quit all applications that specify and directly access the hdisk whose
attribute is to be changed.
3
.
Execute the following command to unmount the file system used by
HDLM.
# umount file-system-mount-point
Creating an HDLM Environment
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Hitachi Dynamic Link Manager User Guide for AIX ®