SCF Reference Manual for the Storage Subsystem (G06.28+, H06.05+, J06.03+)

If the disk is in the STARTING state, substate REVIVE, wait until the revive operation has finished
before continuing to the next step. Both halves must be in the STARTED state before proceeding.
4. Replace the bootstrap program on the primary disk:
-> CONTROL DISK $SYSTEM, REPLACEBOOT $SYSTEM.SYSnn.SYSDISC
5. To facilitate recovery of a mirrored volume in the event of failure, SCF asks, Do you want
to ABORT $SYSTEM-M? Type yes
CAUTION: If you type no, the REPLACEBOOT operation updates the diskboot file on both
disks simultaneously. Do not attempt to replace the bootstrap program on both disks of a
mirrored volume simultaneously.
In response to a yes reply, SCF places the mirror disk in the STOPPED state, substate
HARDDOWN and replaces the bootstrap program on the primary disk.
6. Do not start the stopped mirror disk. Load the system using the disk that has the new bootstrap
program. If the system loads properly, go to Step 7.
If the system load fails in any way:
a. Use the halt codes that are displayed in the Processor Status dialog box in either the
OSM or TSM Low-Level Link application to determine what to do next. For descriptions
of the halt codes, see the Processor Halt Codes Manual.
b. If you still cannot perform a system load after following the halt code instructions, you
can use the unchanged mirror disk to load the system.
7. Reset and start the unchanged mirror disk:
-> RESET $SYSTEM
-> START $SYSTEM
SCF automatically revives the unchanged mirror disk, updating the old bootstrap program
from the new version copied earlier to the primary disk.
Replacing the Disk Bootstrap Program on a Nonmirrored Volume (NonStop S-Series
Servers)
This procedure replaces the disk bootstrap program on an unmirrored volume of a NonStop S-series
server.
The REPLACEBOOT attribute does not apply to Integrity NonStop NS-series servers. Instead, the
bootstrap program is installed through firmware update into flash memory
CAUTION: This procedure assumes that the nonmirrored disk is not a system disk. Do not, under
any circumstances, attempt to replace the disk bootstrap program on a system disk that is not
mirrored. If you attempt to do this and the CONTROL DISK, REPLACEBOOT operation fails or if
the bootstrap program is unusable and no other system disk exists, contact your service provider
and refer to the information about restoring a system disk in the NonStop S-Series Operations
Guide.
Review information about the REPLACEBOOT attribute.
1. As a safety measure, use BACKUP VOLUME MODE to create a backup tape of the disk on
which you are replacing the bootstrap program.
2. Replace the bootstrap program on disk $DATA01:
-> CONTROL DISK $DATA01, REPLACEBOOT $SYSTEM.SYSnn.SYSDISC
3. Reset and start the disk:
-> RESET $DATA01
-> START $DATA01
108 Managing Disks