Installation and Reference Guide for HP MPIO Full Featured DSM for EVA3000/5000 VCS 4.xxx Disk Arrays 3.00.00 (AA-RW8SF-TE, March 2008)

NOTE:
• The P.B.T.L. column shows the device port, bus, target, and LUN.
• The RTP column shows the target port information as defined by SCSI-3 specification.
• The Controller Port# column shows the controller serial number followed by target port number.
hpdsm paths device=1
Path# Controller Port#
State
HBA Slot#
RTP P.B.T.L
1
P4889B59IM501F-1 Active
4
00010001 5.0.0.1
2 P4889B59IM501F-2 Active
4
00010002 5.0.1.1
3 P4889B59IM5024-1 Active
4
00020003 5.0.3.1
4
P4889B59IM5024-2 Active
4
00020004 5.0.4.1
5
P4889B59IM5024-2 Active
4
00020004 3.0.1.1
6 P4889B59IM501F-2 Active
4
00010002 3.0.3.1
7
P4889B59IM5024-1 Active
4
00020003 3.0.4.1
8 P4889B59IM501F-1 Active
4
00010001 3.0.6.1
hpdsm set device policy
Syntax: hpdsm set device=x policy=policy
Syntax: hpdsm set device=all policy=policy
The hpdsm set device policy command sets the load-balancing policy for device x or for all
device, depending on the input p arameter specified, to one of the following:
• No_Load_Balance (NL B) - All I/O requests are routed through a chosen active path.
• Round_Robin (RR) - All I/O requests are distributed a cross all active paths to the device in a
round robin manner.
• Shortest_Queue_Requests (SQR) - Each I/O request is routed to the active path with the least
number of outstanding requests.
• Shortest_Queue_Bytes (SQB) - Each I/O request is routed to the a ctive path with the least number
of outstanding data bytes.
• Shortest_Queue_ServiceTime (SQST) - Each I/O request is routed to the active path where the
total outstanding time for pending I/O requests is the least.
The example below demonstrates the information displayed by the hpdsm set device policy
command.
NOTE:
You cannot change the load balance policy for the devices using SCSI-2 reservations in an MSCS
environment.
Example:
HP MPIO Full Featured DSM for EVA3000/5000 VCS 4.xxx Disk Arrays 3.00.00
29