Compaq ProLiant Cluster HA/F500 Administrator Guide

Secure Path Installation Procedures
4-18 ProLiant Cluster HA/F500 for MA8000 Administrator Guide
COMPAQ CONFIDENTIAL
Writer: Woody Jernigan File Name: e-ch4
Codename: Chargers Part Number: 355220-006 Last Saved On: 7/26/02 2:52 PM
Automatic Failover Detection and Status Reporting
The Secure Path software continuously monitors the operational status of drives
configured on each path. If the Secure Path software detects the failure of an I/O to
complete a drive, it will immediately move that drive to its alternate path and reroute
outstanding I/O accordingly. Following the occurrence of any drive failure, the
Manager reflects the updated Secure Path configuration within its second refresh
interval or sooner if the end user presses the F5 key.
When the Manager discovers the failover of at least one drive, it generates a
Windows pop-up message and designates the path as failed. Because the Secure Path
software detects path failure through failed I/O operations, only those drives with I/O
active at the time of the failure will fail over. Those without active I/O will remain on
the failed path by a drag-and-drop operation.
NOTE: For a quick reference of the disk colors and their meaning, select Legend from the
View pull-down menu. The three possible drive states are identified and displayed in color.
Refer to the Help files for possible path colors.
Manual Failback and Status Reporting
After a failed path is restored, the disks that had been failed over to an alternate path
must be failed back manually, one at a time. As a safeguard, the Secure Path
Manager does not automatically fail back drives. Instead, it enables disks to be
manually failed back after the administrator validates the integrity of the path.
For a failed path to return to the normal (green) state, the path must be restored and
one or both of the following events must occur:
• All of the failed-over disks are failed back to it.
• The server is restarted.