HP NonStop G-Series - Manual (Page 91)

Stop Disk
Terminates all paths for this disk drive. When the Stop action finishes, the paths are in a Down state.
If the disk drive is currently in use, a dialog box warns you and asks whether or not you want to
continue with the action.
Stop Primary Path
Terminates the primary path to the disk. When the Stop action finishes, the path is in a Down state. If
the disk drive is currently in use, a dialog box warns you and asks whether or not you want to
continue with the action.
Stop Volume
Terminates all paths for the primary and mirror drives of this volume. When the Stop action finishes,
the paths are in a Down state.
Switch Process Pair
Switches the primary and backup disk I/O processes.
Switch to Backup Path
Switches processing from the primary to the backup path.
Switch to Primary Path
Switches processing from the backup to the primary path.
Test Verify
Runs the power-on self-test for the disk and tests the internal circuitry of the drive.
Validate Checksum
Scans the user data area of a disk for sector checksum errors. If the action fails, the Action Details
dialog box reports a sector checksum and suggests that you spare the sector only if you believe there
is a drive media problem.
To find additional information, use the OSM Event Viewer. Retrieve events using $ZLOG as the
source criteria and RAL as the subsystem criteria, and look for Disk-sector-failure events (event
number 7001). In the event detail, a Sector-failure-count token shows how many sector checksum
errors were found, and a Disk-logical-sector token appears for each error, providing the logical
address of that failing sector.
You can perform the Validate Checksum action while the disk drive is in use.