HP NonStop NS-series User Manual

ServerNet Resources: Monitoring and Recovery
HP Integrity NonStop NS-Series Operations Guide—529869-005
7-8
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.{X|Y}.*
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 9-9 for 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 NonStop NS-series Specifications

General

Brand	HP
Model	NonStop NS-series
Category	Server
Language	English