8x00 family of Disk Arrays 3.00.00 Installation and Reference Guide (AA-RW7SJ-TE, March 2008)

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hpdsm paths device=1

Path# Controller Port

State

HBA Slot#

RTP P.B.T.L

P8398DXAAQQ013-4 Active

00020008 2.0.2.1

2 P8398DXAAQQ013-3 Active

00020007 2.0.5.1

3 P8398DXAAQQ010-1 Active

00010001 2.0.6.1

P8398DXAAQQ010-1 Active

00010001 3.0.0.1

P8398DXAAQQ013-3 Active

00020007 3.0.1.1

6 P8398DXAAQQ01

3-4

Active

00020008 3.0.2.1

P8398DXAAQQ010-1 Active 3 00010001 4.0.0.1

8 P8398DXAAQQ013-4 Active 3 00020008 4.0.1.1

9 P8398DXAAQQ013-3 Active 3 00020007 4.0.2.1

hpdsm set device policy

Syntax: hpdsm

set device=x policy=policy

Syntax: hpdsm set device=all policy=policy

The hpdsm set device policy comm and sets the load-balancing policy for device x to one of the

following:

• No_Load_Bala

nce (NLB) - All I/O requests are routed through a chosen active path.

• Round_Robin (RR) - All I/O requests are distributed across all active paths to the device in a

round robin manner.

• Shortest_Qu

eue_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 active path with the least number

of outstand

ing 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:

hpdsm set device=1 policy=rr

Device Name : HP HSV210

Device Serial No. : 600508B400101F6A000070001D950000

Change Load Balance policy (y/n)? y

Load Balance policy changed. Verify by issuing “hpdsm devices” command.

Example:

hpdsm set device=all policy=rr

Successful for all the devices. Verify by issuing “hpdsm devices” command.

HP MPIO Full Featured DSM for EVA4x00/6x00/ 8x00 family of Disk Arrays 3.0 0.00