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SYS$MANAGER:CLUSTER_CONFIG.COM procedure to add a copy of the operating system to
a different root directory. (See the HP OpenVMS System Manager's Manual for more information
about using the SYS$MANAGER:CLUSTER_CONFIG.COM procedure.)
To boot from a different directory (for example, [SYS3]), enter the BOOT command as follows:
>>> BOOT -FLAGS 3,0 DKA200
A.1.8 Booting over the Network with an Alternate TURBOchannel Adapter
You can use an alternate TURBOchannel adapter to boot a DEC 3000 series Alpha computer
(with the TURBOchannel option) over the network in an InfoServer or OpenVMS Cluster
environment. Examples of alternate TURBOchannel adapters are the PMAD (which connects to
the Ethernet) and the DEFTA (which connects to the FDDI).
To boot from a TURBOchannel device connected to one of these alternate adapters, enter the
boot command as follows:
>>> BOOT "n/ESA0"
The value for n is the TURBOchannel slot number for the device, which you can obtain by entering
the SHOW CONFIGURATION command at the console prompt (>>>) and examining the display.
In the following example, the TURBOchannel slot number (listed under the “TCINFO” column)
is 0:
>>> SHOW CONFIGURATION
DEC 3000 - M300
Digital Equipment Corporation
VPP PAL X5.56-80800101/OSF PAL X1.34-80800201 - Built on 18-DEC-1996 11:376
TCINFO DEVNAM DEVSTAT
------ -------- --------
CPU OK KN16-AA -V3.2-S6CD-I151-sV2.0-DECchip 21064 P3.0-150
ASIC OK
MEM OK
MEM OK
6
CXT OK
5
NVR OK
SCC OK
NI OK
ISDN OK
4
SCSI OK
0-PMAD-AA TC0
A.1.9 Booting in an Emergency
If a system problem prevents your system from booting, you might need to perform an emergency
boot operation. Table A-3 summarizes these emergency boot operations, and the sections that
follow describe each boot operation in more detail.
Table A-3 Emergency Boot Procedures
When to UseOperation
When parameter values in the parameter file have been modified
so that the system is unbootable
Booting with default system parameters
If an error in the startup or login procedure prevents you from
logging in
Booting without startup and login procedures
If you have forgotten the password and cannot log in to a
privileged account
Booting without the user authorization file
A.1.9.1 Booting with Default System Parameters
If the current values stored in the parameter file have been incorrectly modified, these incorrect
values might cause the system to become unbootable. With a conversational boot operation, you
A.1 Booting Operations 175