HP-UX 11i v3 Native Multi-Pathing for Mass Storage (August 2012)

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Busy status = 0
Queue full status = 0
Reservation conflicts = 0
Invalid Request status = 0
Select Timeout status = 0
Incomplete status = 0
No Resource status = 0
Target Path Offline status = 0
IO Timeout status = 0
IO Aborted status = 0
Reset Occured status = 0
Unrecognized CDB status = 0
Bad Sense data status = 0
Deferred errors = 0
Recovered errors = 0
NOT READY sense status = 0
Medium errors = 0
Hardware errors = 0
Illegal request sense status = 42
Unit Attentions = 1
Lunpath and LUN health
The health property of an I/O node is new in HP-UX 11i v3. You can display it with ioscan –P
health (see
The Next Generation Mass Storage Stack white paper).
The following table explains the health property values of a disk LUN I/O node.
online
The LUN is accessible through one or more lunpaths
offline
All the lunpaths to the LUN have gone offline. As a result, the LUN is not accessible
limited
Not all paths to the LUN are active : some paths are failing
unusable
Not Applicable
disabled
The LUN has been suspended as a result of one of the following errors:
• LUN disabled due to unrecoverable deferred error.
• LUN disabled administratively using the scsimgr disable command. Note: This is currently
supported for disk devices only.
• Change in block size (for disk only)
As a result of being disabled, all pending I/O requests to the LUN are aborted and are returned with
an error to upper layers and applications. No further I/O operation can be issued to the LUN.
standby
Not Applicable
The following table explains the health property values of a lunpath I/O node.
online
The lunpath is active
offline
The lunpath is reported offline as a result of the following conditions:
• The underlying target path becoming offline (see target path offline)
• The lunpath open failed for some of the following reasons:
– INQUIRY command failure
– WWID authentication failure
limited
Not Applicable
unusable
Lunpath authentication failed
disable
The lunpath has been suspended as a result of one of the following errors:
• Lunpath disabled administratively using the scsimgr disable command.
• The corresponding LUN has been disabled
standby
For active/passive devices, the path is a standby path