HP StorageWorks User Manual page 76

• Normal: Path is normal.
• Unknown: Path status is unknown.
• Blockade: Path is blocked.
• External device setting changed: External disk array's setting changed. For example, the path
definition was deleted or the external disk array itself was replaced.
• LDEV size reduced: External disk array's volume capacity setting changed (volume capacity was
reduced).
• Not ready: External disk array replied NOTREADY.
• Illegal request: External disk array replied ILLEGALREQUEST.
• Command aborted: External disk array replied ABORTEDCOMMAND.
• Busy: External disk array status is BUSY.
• LDEV reserved: External disk array status is Reserve.
• Response error: External disk array status is blocked because of an abnormal reply (Response).
• Initiator port: External disk array's port attribute changed to initiator port.
• RCU target port: External disk array's port attribute changed to RCU target.
• Unknown port: External disk array's port attribute is unknown.
• Cannot detect port: Path was removed or external disk array port could not be found.
• Internal error: Program error occurred, or there is a logical contradiction.
• Timeout: Processing was retried because of an abnormal reply, but a timeout occurred.
• Standby: External disk array's port is standing by. Port status is normal, but cannot receive I/O.
• Target error: Port failures, such as controller blockade, were detected on the external disk array
side.
• Checking: External Storage XP is checking defined path configuration information.
• Disconnect: Connection to the external disk array or LU was stopped using the Disconnect
Subsystem or Disconnect Volume command.
• Unavailable: External disk array replied Unavailable. The external disk array demands to
change the connected port. After the status becomes Unavailable, the primary path changes to
the alternate path that is in the Standby status. When the primary path changes, the path status
becomes Normal.
• Backoff: External disk array replied Backoff. The path status is Waiting for Recovery because a
temporary error occurred in the external disk array's volume. Even if the primary path's status
becomes Backoff, the primary path does not change to the alternate path immediately. After the
error recovery, the status becomes Normal. If you cannot recover the status from the error, the
path status changes to the other status.
• I/O TOV: Time over value for I/O to the external LU
• Qdepth: Number of Read/Write commands that can be issued (queued) to an external LU at one
time
• Path Watch: Time until the path is blocked after the connection to the external disk array has been
down
• Mode: How the local disk array manages alternate paths when defined. Possible values:
• Single: Uses only the path with the highest priority (primary path) to execute I/Os to the external
LU. If selected, the second-highest priority alternate path is enabled only if a maintenance
operation or failure affecting the primary path occurs. That is, the external array contains
Active/Passive (for example, MSA) or Asymmetrical Active/Active controllers (for example,
Hitachi 9500V).
• Multi: Uses all of the set paths at one time to execute I/Os to the external LU, distributing the
workload. That is, the external array contains Symmetrical Active/Active controllers (for
example, XP).
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76 External Storage XP for the XP12000/XP10000