HP NonStop G-Series - Manual (Page 89)

Switch Process Pair
Switches the primary and backup disk I/O processes.
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. You can use the Abort
Action button to cancel this action.
E4SA (Ethernet 4 ServerNet Adapter) CRU
An adapter that connects the ServerNet connections inside a server to an Ethernet local area network
(LAN). The Ethernet 4 ServerNet Adapter (E4SA) CRU contains two Ethernet ServerNet
addressable controllers (SACs), each of which contains two Ethernet physical interfaces, for a total
of four Ethernet ports on each E4SA CRU.
Location in OSM Tree: System > Group > Module > E4SA
Slot Location: E4SA CRUs can be located in slots 53 and 54 in processor enclosures (service side)
or in slots 51, 52, 53, and 54 in IOMF or IOMF2 enclosures (service side).
Example: E4SA $ZZLAN.E4SA0 (1.1.53)
Attributes
E4SA
Service State
Displayed in the Attributes tab and Attributes dialog box only if attention or service is
required.
Values
Physical
Power State Indication of whether the component is powered On or Off.