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HiCommand Dynamic Link Manager User's Guide (for Windows(R))
- Organization of this subsection
- (1) Status transition of paths in the Online status
- (2) Automatic switching of paths that have the Online(E), Offline(C), or Offline(E) status
(1) Status transition of paths in the Online status
In HDLM 5.5 or later, if one of the below conditions exists, the status of Online paths will change to Online(E) or Offline(E). In HDLM 5.4 or earlier, even if one of the following conditions exists, the path status remains Online.
- A path disconnection that is free from I/O errors has occurred
- An LU has been removed from being an HDLM management-target
(2) Automatic switching of paths that have the Online(E), Offline(C), or Offline(E) status
In HDLM 5.5 or later, if one of the following conditions exists, the status of Online(E), Offline(C), or Offline(E) paths will automatically change to Online. In HDLM 5.4 or earlier, even if one of the following conditions exists, the path status does not automatically change to Online.
- Online(E) Paths
If one of the following conditions exists, Online(E) paths will automatically change to Online.
- A path disconnection that is free from I/O errors has been recovered
- An LU was removed from being an HDLM management-target and then the LU has been added as an HDLM management-target again
- Offline(C) Paths
When the following conditions are satisfied, the connected Offline(C) paths are automatically placed Online:
- All the online paths are Online(E) and SCSI devices connected to the Online(E) paths have been deleted.
- SCSI devices are connected and all Offline(E) paths are subject to automatic failback.
- SCSI devices are connected to the Offline(C) paths.
- Offline(E) Paths, where intermittent errors are thought to have occurred
When the following conditions are satisfied, the connected Offline(E) paths are automatically placed Online:
- All the online paths are Online(E) and SCSI devices connected to the Online(E) paths have been deleted.
- The SCSI devices are connected to the Offline(E) paths.
- Offline(E) Paths, where intermittent errors are not thought to have occurred
If one of the following conditions exists, Online(E) paths will automatically change to Online.
- A path disconnection that is free from I/O errors has been recovered
- An LU was removed from being an HDLM management-target and then the LU has been added as an HDLM management-target again
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