HP StorageWorks MSA1000 Software Guide

34 Using the CLI
Enabling/disabling automatic path switching
NOTE: This command is available only with active/active firmware (v6.x or later).
If implicit path changes are enabled, controller firmware will automatically determine and, as needed,
switch controller paths for units based on host request load, according to the specified preferences.
Basic command
set auto_path_change <enable|disable> [prp=#] [mnr=#] [twp=#] [twl=#]
Command options
enable|disable—enables or disables implicit path switching.
prp—specify a proxied percentage (# = 51-100). This is the minimum percentage of proxied requests
required to trigger implicit path change.
mnr—specify the minimum number of requests that must be issued to the LUN before path changes are
enabled (the number is rounded up to the next highest power of two).
twp—specify the minimum number of minutes (0-255) to wait at power-up before changing LUN
ownership.
twl—specify the minimum number of minutes (0-255) to wait before changing LUN ownership again
for same unit.
Example command and response
CLI> set auto_path_change disable
Implicit (automatic load-based) LUN ownership changes are currently
DISABLED.
CLI> set auto_path_change enable
Implicit (automatic load-based) LUN ownership changes are currently ENABLED.
Implicit LUN ownership change preferences are as follows:
Minimum % of proxied requests to trigger implicit path change..: 75%
Minimum number of requests to LUN before path change enabled...: 65536
Minimum time to wait before changing ownership after power-up..: 30 minutes
Minimum time between ownership changes for LUN.................: 30 minutes
CLI> set auto_path_change twp=15
Implicit (automatic load-based) LUN ownership changes are currently ENABLED.
Implicit LUN ownership change preferences are as follows:
Minimum % of proxied requests to trigger implicit path change..: 75%
Minimum number of requests to LUN before path change enabled...: 65536
Minimum time to wait before changing ownership after power-up..: 15 minutes
Minimum time between ownership changes for LUN.................: 30 minutes

HP StorageWorks MSA1000 Specifications

General

RAID levels	0, 1, 0+1, 5
Certification	Microsoft Cluster Server Certification\\r Hewlett Packard Data Protector\\r VERITAS Backup Exec and NetBackup\\r Legato NetWorker for Windows\\r Computer Associates BrightStor Enterprise Backup
Internal memory	256 MB
Memory clock speed	- MHz
Internal memory type	-
Operating temperature (T-T)	10 - 35 °C
Operating relative humidity (H-H)	10 - 90 %
Supported storage drive interfaces	SCSI
Windows operating systems supported	Yes
Harmonized System (HS) code	84733080

Weight and Dimensions

Depth	52.1 mm
Width	48.3 mm
Height	17.5 mm
Weight	31210 g