Updated: 11 December 1998 |
OpenVMS System Manager's Manual
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In a conversational boot operation, you can show and modify values for individual parameters.1 The system modifies the values both in memory and in the system parameter file.
SYSBOOT> SET UAFALTERNATE 1 |
SYSBOOT> CONTINUE |
SYSBOOT> SHOW UAFALTERNATE Parameter Name Current Default Min. Max. Unit Dynamic -------------- ------- ------- ------- ------- ---- UAFALTERNATE 0 0 0 1 Boolean SYSBOOT> SET UAFALTERNATE 1 SYSBOOT> CONTINUE |
In programming research and development environments where you must alter operating conditions for experimentation, testing, and debugging, you might want to temporarily boot your system using system parameter values stored in a parameter file other than the default parameter file. The conversational boot operation lets you reset active values using a different parameter file.1
USE file-spec |
where file-spec specifies the file name and type of the
alternate parameter file. The file must be in SYS$SYSTEM. You cannot
specify a device name. For example:
SYSBOOT> USE ALTPARAMS.DAT |
SYSBOOT> CONTINUE |
SYSBOOT> USE ALTPARAMS.DAT SYSBOOT> CONTINUE |
1 In most cases, Compaq recommends that you use AUTOGEN to modify system parameters. In special cases, however, you can use a conversational boot to modify a parameter value temporarily. To change a parameter value permanently, you must edit MODPARAMS.DAT and run AUTOGEN. For instructions, see Section 14.5. |
4.3 Assigning Port Allocation Classes with SYSBOOT
Compaq recommends that you use the CLUSTER_CONFIG procedure to define port allocation classes. If this is not possible (for example, if you are booting a private system disk into an existing cluster), you can use the SYSBOOT SET/CLASS command to assign port allocation classes to shared SCSI ports. For example, if port PKB is connected to a SCSI bus that another node has assigned port allocation class 152, you would enter the following command:
SYSBOOT> SET/CLASS PKB 152 |
Be sure that the DEVICE_NAMING parameter is set to 1 to enable new device-naming; for example:
SYSBOOT> SET DEVICE_NAMING 1 |
To deassign a port allocation class, enter the port name without a class number; for example:
SYSBOOT> SET/CLASS PKA |
If a system problem prevents your system from booting, you might need to perform an emergency boot operation. Table 4-1 describes these emergency boot operations.
Operation | Use | For More Information |
---|---|---|
Booting with default system parameters | When parameter values in the parameter file have been modified so that the system is unbootable | Section 4.4.1 |
Booting without startup and login procedures | If an error in the startup or login procedures prevents you from logging in | Section 4.4.2 |
Booting without the user authorization file | If you have forgotten the password and cannot log in to a privileged account | Section 4.4.3 |
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 can reset the active values for all system parameters to the default value.
Note that in most cases, Compaq recommends that you use AUTOGEN to modify system parameters. In special cases, however, you can use a conversational boot to modify a parameter value temporarily. To change a parameter value permanently, you must edit MODPARAMS.DAT and run AUTOGEN. For instructions, see Section 14.5.)
SYSBOOT> USE DEFAULT |
SYSBOOT> SET STARTUP_P1 "MIN" |
SYSBOOT> CONTINUE |
SYSBOOT> USE DEFAULT SYSBOOT> SET STARTUP_P1 "MIN" SYSBOOT> CONTINUE Username: SYSTEM Password: $ EDIT SYS$SYSTEM:MODPARAMS.DAT . . . [Insert the following line in MODPARAMS.DAT:] MIN_NPAGEDYN = 2999808 . . . $ @SYS$UPDATE:AUTOGEN SAVPARAMS REBOOT |
If the system does not complete the startup procedures or does not allow you to log in, bypass the startup and login procedures. The startup and login procedures provided by Compaq should always work. However, if you introduce an error when modifying the startup or login procedures, you can accidentally lock yourself out of the system. The following instructions tell you what to do in such a situation.
SYSBOOT> SET/STARTUP OPA0: |
SYSBOOT> CONTINUE |
$ SET NOON |
$ RUN SYS$SYSTEM:SYSMAN SYSMAN> PARAMETERS USE CURRENT SYSMAN> PARAMETERS SET/STARTUP SYS$SYSTEM:STARTUP.COM SYSMAN> PARAMETERS WRITE CURRENT SYSMAN> EXIT $ |
$ @SYS$SYSTEM:STARTUP |
SYSBOOT> SET/STARTUP OPA0: SYSBOOT> CONTINUE $ SET NOON $ SET DEFAULT SYS$SYSROOT:[SYSEXE] $ RUN SYS$SYSTEM:SYSMAN SYSMAN> PARAMETERS USE CURRENT SYSMAN> PARAMETERS SET/STARTUP SYS$SYSTEM:STARTUP.COM SYSMAN> PARAMETERS WRITE CURRENT SYSMAN> EXIT $ @SYS$SYSTEM:STARTUP |
Ordinarily, the startup and login procedures provided by Compaq always work; however, certain user interventions can cause them to fail. A very simple way to lock yourself out of the system is to set passwords to login accounts and forget them. In such an emergency, you can use the alternate user authorization file rather than the standard user authorization file.
You can use this method only to log in to the system from the console terminal; you cannot use other terminal lines. |
Setting the system parameter UAFALTERNATE defines the logical name SYSUAF to refer to the file SYS$SYSTEM:SYSUAFALT.DAT. If this file is found during a normal login, the system uses it to validate the account and prompts you for the user name and password.
If it cannot find this file, the system assumes that the UAF is corrupt and accepts any user name and any two passwords to log you in to the system from the system console. Logins are prohibited from all other terminal lines.
When you perform this procedure, the system assigns the following values to your user account:
Field | Value |
---|---|
Name | User name |
UIC | [001,004] |
Command interpreter | DCL |
Login flags | None |
Priority | Value of the system parameter DEFPRI |
Resources | Values of the PQL system parameters |
Privileges | All |
SYSBOOT> SET UAFALTERNATE 1 |
SYSBOOT> SET WINDOW_SYSTEM 0 |
SYSBOOT> CONTINUE |
$ DEFINE/SYSTEM/EXECUTIVE_MODE SYSUAF SYS$SYSTEM:SYSUAF.DAT |
$ RUN SYS$SYSTEM:SYSMAN SYSMAN> PARAMETERS USE CURRENT SYSMAN> PARAMETERS SET UAFALTERNATE 0 |
SYSMAN> PARAMETERS SET WINDOW_SYSTEM 1 |
SYSMAN> PARAMETERS WRITE CURRENT |
SYSBOOT> SET UAFALTERNATE 1 SYSBOOT> SET WINDOW_SYSTEM 0 SYSBOOT> CONTINUE Username: [Return] Password: [Return] Password: [Return] $ DEFINE/SYSTEM/EXECUTIVE_MODE SYSUAF SYS$SYSTEM:SYSUAF.DAT $ SET DEFAULT SYS$SYSTEM $ RUN AUTHORIZE AUTHORIZE> MODIFY SYSTEM/PASSWORD=FGLFTUTU AUTHORIZE> EXIT $ RUN SYS$SYSTEM:SYSMAN SYSMAN> PARAMETERS USE CURRENT SYSMAN> PARAMETERS SET WINDOW_SYSTEM 1 SYSMAN> PARAMETERS SET UAFALTERNATE 0 SYSMAN> PARAMETERS WRITE CURRENT SYSMAN> EXIT $ @SYS$SYSTEM:SHUTDOWN |
Section 4.1.4 explains the site-independent startup command procedure, SYS$SYSTEM:STARTUP.COM. By default, when your system boots, it automatically executes STARTUP.COM to execute startup events. Under special circumstances, you might want to control site-independent startup when you boot the system. For example, you might want to perform one of the following tasks:
Task | For More Information |
---|---|
Boot with an alternate site-independent startup procedure | Section 4.5.1 |
Boot with an alternate site-independent startup command procedure by default | Section 4.5.2 |
Boot with minimum startup | Section 4.5.3 |
Display startup procedure commands as they execute | Section 4.5.4 |
Do not modify STARTUP.COM. The system requires this procedure to correctly start up the system. For information about modifying site-specific startup procedures to perform site-specific operations, see Section 5.2. |
The default system startup procedure is SYS$SYSTEM:STARTUP.COM. Compaq recommends you do not modify STARTUP.COM. However, in special environments, you might want the system to perform special startup commands. The conversational boot lets you specify that the system temporarily use an alternate startup procedure.
You can also perform site-specific startup events by adding commands to the site-specific startup command procedures. For more information, see Section 5.2.
SYSBOOT> SHOW/STARTUP |
SET/STARTUP file-spec |
where file-spec specifies the entire file specification
for the startup file to be used, including the device and directory.
For example:
SYSBOOT> SET/STARTUP SYS$SYSTEM:XSTARTUP.COM |
Error opening primary input file SYS$INPUT File not found |
SYSBOOT> SHOW/STARTUP |
SYSBOOT> CONTINUE |
To make your alternate site-independent startup procedure the default startup procedure, see Section 4.5.2.
SYSBOOT> SHOW/STARTUP Startup command file = SYS$SYSTEM:STARTUP.COM SYSBOOT> SET/STARTUP SYS$SYSTEM:XSTARTUP.COM SYSBOOT> SHOW/STARTUP Startup command file = SYS$SYSTEM:XSTARTUP.COM SYSBOOT> CONTINUE |
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