SCF Reference Manual for the Storage Subsystem (G06.27+, H06.04+)

Configuring Magnetic Disks

SCF Reference Manual for the Storage Subsystem—529937-008

6-5

System Disk Configuration

When you configure the system disk, these restrictions exist:

•

You cannot use SCF to configure the system disk. The system generation program

configures the system disk. If the system disk is configured improperly, the system

halts during system load, and you must use the system generation program to

recover.

•

You can specify an alternate system disk and perform a system load from it to

create an alternate system configuration. For more information, see the NonStop

S-Series Hardware Installation and FastPath Guide.

•

For NonStop S-series systems, enclosure interleaving is not supported for the

system disks. Both halves of the system disk must be in enclosure 1.

•

Beginning with G06.06, on NonStop S-series systems, the system disk can reside

in other slots in group 01 besides 11 and 12. For more information, refer to the

NonStop S-Series Planning and Configuration Guide.

•

On NonStop S-series servers, the system disk and its mirror cannot be M8xxx

Fibre Channel disks.

•

These attributes cannot be changed:

The system disk always runs with FSTCACHING ON.

You cannot decrease these attribute values online because the disk must be

stopped to decrease them. The configured value will can decreased, but the

IOP will continue to run with the original, larger value until it is stopped and

restarted.

CBPOOLLEN

MAXLOCKSPEROCB

MAXLOCKSPERTCB

NUMDISKPROCESSES