Installation and Reference Guide HP StorageWorks Secure Path 3.0F Service Pack 4 for HP-UX 11i v1.0 and 11i v2.0 (5697-8001, March 2009)
• Path verification—The driver checks the state of all possible paths to all units at a selectable period
or frequency. By default, the path verification is enabled with a period of 30 seconds.
• Auto-restore—The auto-restore command enables the driver to automatically restore paths to
their preferred path after a failure and subsequent reinstatement of that path. By default, auto-restore
is disabled.
Syntax:
# spmgr set [option]
Options:
• -b <on|off> [WWNN] — Enables or disables load balancing.
• -b <type> [WWNN] — Enables a load balancing algorithm.
The following are the load balancing types:
• rr - Round Robin
• li - Least I/O
• ls - Least Service Time
• lb - Least Bandwidth
• -p <on|off> [WWNN] — Enables or disables path verification.
• -a <on|off> [WWNN] — Enables or disables auto-restore.
• -f <value> — Sets the path verification period (in seconds ).
NOTE:
WWNN is the World Wide Node Name of the Array.
The set command includes the following:
• # spmgr set -a on | off WWNN
• # spmgr set -b on | off | rr | lb | li | ls WWNN
• # spmgr set -p on | off WWNN
• # spmgr set -f (1…65535 seconds)
# spmgr set -a on | off WWNN
This command enables or disables the auto-restore feature of the driver. When auto-restore is enabled,
it directs the driver to monitor the state of the paths. If the preferred path fails and then later returns
to service, the driver automatically reroutes all I/O to the restored path. When auto-restore is disabled,
there is no auto-restore by the Secure Path driver. The I/O continues along the current path until
another event changes the active path. By default, the setting is disabled (off).
NOTE:
If you enable auto-restore using spmgr set –a on command and select a new path using the
spmgr select path command, the selected path stays selected and is not auto-restored.
Auto-restore returns to the currently active path only if that path has failed and the failure has been
repaired.
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