Table 3-5 Openvms Boot Flag Settings - Compaq ES40CSLP Installation, User & Service Manual

OpenVMS Systems
OpenVMS systems require an ordered pair as the flags_value argument: root_number and
boot_flags.
root_number Directory number of the system disk on which OpenVMS files are
located. For example:
root_number
0 (default)
1
2
3
boot_flags The hexadecimal value of the bit number or numbers set. To specify
multiple boot flags, add the flag values (logical OR). For example, the
flag value 10080 executes both the 80 and 10000 flag settings. See Table
3-5.

Table 3-5 OpenVMS Boot Flag Settings

Flags_Value Bit Number
1 0
2 1
4 2
8 3
10 4
20 5
80 7
100 8
10000 16
20000 17
Examples:
In the following Tru64 UNIX example, the boot flags are set to autoboot the system to
multiuser mode when you enter the boot command.
P00>>> set boot_osflags a
In the following OpenVMS example, root_number is set to 2 and boot_flags is set to 1. With
this setting, the system will boot from root directory SYS2.SYSEXE to the SYSBOOT prompt
when you enter the boot command.
P00>>> set boot_osflags 2,1
In the following OpenVMS example, root_number is set to 0 and boot_flags is set to 80. With
this setting, you are prompted for the name of the secondary bootstrap file when you enter the
boot command.
P00>>> set boot_osflags 0,80
Compaq ES40CSLP Rackmount System Installation/User/Service Guide 3–19
Root Directory
[SYS0.SYSEXE]
[SYS1.SYSEXE]
[SYS2.SYSEXE]
[SYS3.SYSEXE]
Meaning
Bootstrap conversationally (enables you to modify
SYSGEN parameters in SYSBOOT).
Map XDELTA to a running system.
Stop at initial system breakpoint.
Perform diagnostic bootstrap.
Stop at the bootstrap breakpoints.
Omit header from secondary bootstrap image.
Prompt for the name of the secondary bootstrap file.
Halt before secondary bootstrap.
Display debug messages during booting.
Display user messages during booting.
Operation