NonStop S-Series Planning and Configuration Guide (G06.25+)

The Planning and Configuration Process
HP NonStop S-Series Planning and Configuration Guide—523303-015
9-11
Configuring $SYSTEM Disk Slots
For All Internal Disk Drives
•
Configure the primary half of a mirrored internal disk volume in an odd-numbered
slot and the mirror half in the next higher even-numbered slot. Follow this
recommendation even when the two halves are in different enclosures.
•
Before you install disks that you intend to configure as interleaved, use the SCF
ALTER $ZZSTO, AUTOCONFIGURE OFF command to prevent automatic,
noninterleaved configuration of the disks.
Configuring $SYSTEM Disk Slots
When NonStop S-series servers were first released, the $SYSTEM volume was
restricted to slots 11 and 12 of group 01. Beginning on the G06.06 RVU (and on the
G06.04 RVU using SPR T6586AAH), you can install the two halves of the $SYSTEM
volume in any two slots of group 01 that have the same SCSI ID. These slot pairs are:
Limitations and Considerations
•
The alternate volume name for every disk in the system must be unique.
•
The CONFIG file used to load a system can contain at most one disk configuration
for the $SYSTEM volume, and this configuration can configure only slots that have
the same SCSI ID.
•
If the CONFIG file contains a disk configuration record that has a name other than
$SYSTEM, and if this disk is used to load the system, that configuration record is
renamed $SYSTEM and any other disk configuration record with the name
$SYSTEM is renamed with a unique disk name. The new $SYSTEM also becomes
mirrored if it was not already. For more information, refer to the SCF Reference
Manual for the Storage Subsystem.
SCSI ID Slot for Primary Slot for Mirror
011 12
113 14
215 16
317 18
41 2
53 4
85 6
97 8