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

Root Directory

 

 

0 (default)

[SYS0.SYSEXE]

1

[SYS1.SYSEXE]

2

[SYS2.SYSEXE]

3

[SYS3.SYSEXE]

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 6–1.

Table 6–1 OpenVMS Boot Flag Settings

Flags_Value

Bit Number

Meaning

1

0

Bootstrap conversationally (enables you to

 

 

modify SYSGEN parameters in SYSBOOT).

2

1

Map XDELTA to a running system.

4

2

Stop at initial system breakpoint.

8

3

Perform diagnostic bootstrap.

10

4

Stop at the bootstrap breakpoints.

20

5

Omit header from secondary bootstrap image.

80

7

Prompt for the name of the secondary bootstrap

 

 

file.

100

8

Halt before secondary bootstrap.

10000

16

Display debug messages during booting.

20000

17

Display user messages during booting.

 

 

 

 

 

Continued on next page

Booting and Installing an Operating System 6-13

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Compaq GS320, GS160, GS80 manual OpenVMS Boot Flag Settings, FlagsValue Bit Number Meaning