HP StorageWorks XP12000 User Manual page 86

• Normal: Path is normal.
• Unknown: Path status is unknown.
• Blockade: Path is blocked.
• External device setting changed: External array's setting changed. For example, the path
definition was deleted or the external array itself was replaced.
• LDEV size reduced: External array's volume capacity setting changed (volume capacity was
reduced).
• Not ready: External array replied NOTREADY.
• Illegal request: External array replied ILLEGALREQUEST.
• Command aborted: External array replied ABORTEDCOMMAND.
• Busy: External array status is BUSY.
• LDEV reserved: External array status is Reserve.
• Response error: External array status is blocked because of an abnormal reply (Response).
• Initiator port: External array's port attribute changed to initiator port.
• RCU target port: External array's port attribute changed to RCU target.
• Unknown port: External array's port attribute is unknown.
• Cannot detect port: Path was removed or external 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 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 array side.
• Checking: External Storage XP is checking defined path configuration information.
• Disconnect: Connection to the external array or LU was stopped using the Disconnect Subsystem
or Disconnect Volume command.
• Unavailable: External array replied Unavailable. The external 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 array replied Backoff. The path status is Waiting for Recovery because a
temporary error occurred in the external 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 period beginning when the connection of all paths to the external LU is down and
ending when the external LU is blocked
• Mode: How the local 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 the same 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).
• Previous and Next buttons
If you select multiple external LUs in the Device list, click Previous to change the Alternate Path list to the
external LU appearing just above the currently displayed LU. Click Next to change the Alternate Path
list to the external LU appearing just below the currently displayed LU.
86 Configuring external LUs