HP NonStop NS manual Recovery Operations for the ServerNet Fabrics

ServerNet Resources: Monitoring and Recovery Related Reading

Recovery Operations for the ServerNet Fabrics

For most recovery operations, refer to the SCF Reference Manual for the Kernel Subsystem.

Recovery Operations for a Down Disk Due to a Fabric Failure

When a path to a disk drive goes down due to a ServerNet fabric failure (either the ServerNet X or Y fabric is down), the storage subsystem automatically switches the paths of the disk drive if possible, so that the disk drive remains operational. This switching might result in a disk drive being placed in the STOPPED state with a substate of HARDDOWN.

You must restart any disk path that was using the fabric that went down. Otherwise the storage subsystem never attempts to use that path, which creates a potential single point of failure. For more information, refer to Recovery Operations for a Down Disk or Down Disk Path on page 10-14.

Recovery Operations for a Down Path Between Processors

When the status is either DIS (disabled) or DN (down), you can restart all paths between processors on the X fabric or Y fabric:

> SCF START SERVERNET $ZSNET.{XY}.*

Refer to the SCF Reference Manual for the Kernel Subsystem.

Recovery Operations for a Down Processor

If the status for an existing processor is <- DOWN or UNA, refer to Recovery Operations for a Processor Halt on page 9-9for more information about recovery operations.

Recovery Operations for a File-System Error

For information about file-system errors, refer to the Guardian Procedure Errors and Messages Manual.

Related Reading

For more information about the interconnections between Integrity NonStop systems and NonStop S-series systems, see the Integrity NonStop NS-Series Planning Guide.

For more information about the ServerNet fabrics, see the SCF Reference Manual for the Kernel Subsystem.

HP Integrity NonStop NS-Series Operations Guide—529869-005

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