NonStop NS-Series Operations Guide (H06.12+)

configuration that you want to load. The system disk that you load from starts as $SYSTEM. Any
alternate system disks start using their alternate name.
After you select a system load disk, the Disk Type box indicates whether you’ve selected a Fibre
Channel (FCDM) or SCSI disk. The Path window is populated with information about four load
paths. You can double-click on a row to make changes. However, the changes do not persist after
the dialog box is closed.
You can choose these system load disks:
• An FCDM-Load attempts to load the system from a system disk in the disk drive enclosure
connected to IOAM enclosure group 110:
Disk Drive
Enclosure
FCSAIOAM
BayShelfSACSlotModuleGroupPath
11112110Primary
11113110Backup
11213110Mirror
11212110Mirror
Backup
NOTE: For Integrity NonStop NS14000, NS1200, and NS1000 servers, Fibre Channel disks
are connected to IOAMs or VIO enclosures located in group 100. For more information, see
the NonStop NSxxxx Hardware Installation Manual for your Integrity NonStop NS14000,
NS1200, or NS1000 server, or the Versatile I/O (VIO) Manual.
• A SCSI-Load attempts to load the system from a disk in group, module, slot 11.1.11 of a
NonStop S-series I/O enclosure.
• A load from $SYSTEM attempts to load the system from a disk in group, module, slot 11.1.11
of a NonStop S-series I/O enclosure, by default.
• You can configure additional alternate system disks to load from. To create an alternate
system disk, see the NonStop NSxxxx Hardware Installation Manual for your Integrity NonStop
NS16000 series, NS14000, NS1200, or NS1000 server. Then use OSM to make the disk available
in the Configuration Drop-down menu in the System Load dialog box.
System Load Paths for a Normal System Load
16 paths are available for loading. Table 15-1 (page 159) describes each load path in order of use.
The system load task attempts to use each path until the system load is successful or all possible
paths have been tried. If the system load fails along all paths, refer to “Troubleshooting and
Recovery Operations ” (page 167).
Table 15-1 System Load Paths in Order of Use
Data Travels
Over ServerNet
Fabric
To ProcessorFromDescriptionLoad Path
X0$SYSTEM-PPrimary1
Y0$SYSTEM-PPrimary2
X0$SYSTEM-PBackup3
Y0$SYSTEM-PBackup4
X0$SYSTEM-MMirror5
Starting a System 159