HP XP Racks - Manual (Page 308)

In HDLM 6.3 or later, the default reservation policy values for multiple hdisks
can be changed simultaneously by executing the dlmchpdattr utility.
Format
/usr/DynamicLinkManager/bin/dlmchpdattr
{-a Attribute=Value [Attribute=Value ...]
[-u { HTC | XP }] [-A] [-s]
| -o
| -h}
Parameters
-a Attribute=Value
Specifies one or more attribute name and attribute value pairs. If
specifying multiple pairs, separate them by using a space, and enclose
the list of pairs in double quotation marks (").
The following table lists the attribute names and values that can be
specified.
Table 7-3 Attribute names and values that can be specified in
dlmchpdattr
Attribute names that can be
specified in dlmchpdattr
Values that can be specified
reserve_policy Specifies the reservation policy to be used.
no_reserve: Reservation requests are ignored,
and LUs are not reserved.
PR_exclusive: Uses persistent reservations
(exclusive-host methodology) to reserve disks..
PR_shared: Uses persistent reservations
(shared-host methodology) to reserve disks.
The default is PR_exclusive.
max_transfer Specifies the maximum size of data that can be
transferred to the disk.
The range of specifiable values conforms to the
applicable PdAt ODM rule for HTC_ODM or
XP_ODM.
queue_depth Specifies the maximum number of requests that
the queue on the disk can hold.
The range of specifiable values conforms to the
applicable PdAt ODM rule for HTC_ODM or
XP_ODM.
rw_timeout Specifies the timeout value for a read or write
operation. The range of specifiable values
conforms to the applicable PdAt ODM rule for
HTC_ODM or XP_ODM.
7-14
Utility Reference
Hitachi Dynamic Link Manager (for AIX) User Guide