HP XP P9500 Storage - Manual (Page 156)

7
.
Start the programs stopped in step 3.
If you stopped programs other than HDLM in step 3, start them.
About the Reservation Policy
The following table lists and describes the values for the reservation policy
setting.
Table 3-19 Reservation Policy Settings
Setting Description
no_reserve Ignores a reservation request and does not reserve an LU. This
setting is used when any of the following are applicable:
•
Multiple hosts share an LU and execute unique applications that
have an exclusive control feature
• A virtual I/O function is used to set up an MPIO configuration for
a virtual SCSI disk in a client partition
• A virtual I/O function is applied in order to use PowerHA in a
client partition
• In an Oracle RAC environment, the hdisk for an HDLM-managed
device is specified as a disk used by Oracle RAC
• PowerHA 7.1 is used
PR_exclusive Uses persistent reservations (exclusive-host methodology) to reserve
disks.
PR_shared Uses persistent reservations (shared-host methodology) to reserve
disks.
About changing the reservation policy
¢
You should check that the hdisk is not being accessed by any other
programs before you attempt to change the reservation policy.
¢
When you change the reservation policy, the I/O count and error
count are cleared.
¢
The status of the paths is changed to Online.
¢
Make sure that there are no path errors before you change the
reservation policy.
If the reservation policy is changed while there is an error in a path,
the erroneous path is deleted.
To recover from this status, resolve the error and then execute one of
the following commands:
mkdev -l hdisk-name
cfgmgr
3-90
Creating an HDLM Environment
Hitachi Dynamic Link Manager User Guide for AIX ®