Enabling and disabling the autoboot and autosearch flags
determines one of four boot device and console selections for system initialization. Hardware interprets the selections as follows:
Manual (autoboot off and autosearch off). Ask for the path to the boot device. Use the path that is indicated. Initialize the path given, and boot from it.
Bootsearch (autoboot off and autosearch on). Search for a boot device. (Devices are searched from the smallest to the largest physical address on the processor's bus.) If the boot device has an incorrect data format, search for the next boot device. If no boot device exists, or all have the incorrect data format, execute manual selection.
Autoboot (autoboot on and autosearch off). Try to boot from the primary boot device specified in stable storage. If the boot device does not exist or has an incorrect data format, execute manual selection. Once booted, execute (performed by ISL) an autoboot file, which contains a command sequence, to bring up the operating system without operator intervention. If the autoboot
file does not exist, prompt the operator for the utility command.
Autosearch (autoboot on and autosearch on). Try to boot from the boot device path stored in stable storage. If the boot device does not exist or has an incorrect data format, execute the boot search selection. Once booted, execute (performed by ISL) an autoboot file, which contains an autoboot sequence, to bring up the operating system without operator intervention. If the autoboot file does not exist, prompt the operator for
the utility command.
To enable or disable these features, use the AUTOBOOT
and AUTOSEARCH commands. Enter one or both of the commands and the desired setting (ON/OFF) at the ISL prompt. The system responds with a message indicating the flag status:
ISL> AUTOBOOT ON
Autoboot is ON (enabled).
ISL> AUTOBOOT OFF
Autoboot is OFF (disabled).
ISL> AUTOSEARCH ON
Autosearch is ON (enabled).
ISL> AUTOSEARCH OFF
Autosearch is OFF (disabled).
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For more information on the autoboot and autosearch flags, refer to Appendix C “Reading Stable Storage and Nonvolatile Memory”.
Modifying boot paths in stable storage |
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The ISL commands PRIMPATH, ALTPATH, and
CONSPATH are available for placing new primary boot path, alternate boot path, or console boot path information in stable storage. The changes need to be in stable storage to execute the autoboot sequence properly in the event of a power outage or other serious failure.
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 | CAUTION: The commands described in the above paragraph may disrupt normal system
functions if used inappropriately. For this reason, do not attempt to use
these commands without assistance from Hewlett-Packard service personnel.
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To execute any of these three commands, enter the command
with its appropriate parameter or enter Return after
the command and wait to be prompted for further input:
or
ISL> ALTPATH
Enter alternate boot path: 6/4.3.0
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To withdraw a command (without changing the path), enter Return after entering the command without any parameter. For example,
ISL> ALTPATH
Enter alternate boot path: Return
Invalid Input.
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Trailing zeros are not required when a boot path is entered:
ISL> PRIMPATH 2/4.0.0
ISL> CONSPATH 2/4.1.0
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If an improper path format is entered, or you have withdrawn a command as shown above, the system issues an Invalid
Input message. Then ISL prompts for a new command:
ISL> PRIMPATH 240
Invalid Input.
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Displaying current boot path, autoboot, and autosearch settings |
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Since an improper path keeps the system from booting, use the DISPLAY command to check the paths entered. Double check these entries against a recent I/O map from the ISL IOMAP utility or a configuration listing from the SYSGEN utility. For more information on SYSGEN, refer to Chapter 4 “Using the System Generator (SYSGEN)”.
The DISPLAY or DI command lists the autoboot and autosearch settings,
the primary boot path, the alternate boot path, and the system console path
held in stable storage. Use the DISPLAY command to verify that correct
information resides in stable storage. Example 3-3 demonstrates using the ISL
DISPLAY command. This is an example from a Series 949 system. The boot
paths may vary, depending on the system.
Example 3-3 Displaying an example of ISL Settings
ISL> DISPLAY
Fastsize value is 0000000F
Autoboot is ON (enabled)
Autosearch is OFF (disabled)
Primary boot path is 4.1.0.0.0.0.0
Primary boot path is (hex) 4.1.0.0.0.0.0
Alternate boot path is 4.5.0.0.0.0.0
Alternate boot path is (hex) 4.5.0.0.0.0.0
System console path is 4.2.0.0.0.0.0
System console path is (hex) 4.2.0.0.0.0.0
Last utility launched from ISL was START
ISL>
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Setting fastsize |
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If fastsize is set to the wrong value, you cannot do installs or updates. The
only value that is acceptable is "F." If you try to do an update or install
with fastsize set to the wrong value, you will receive an error message that
reads UTILITY REQUIRES MORE MEMORY THAN IS CONFIGURED.
Consider the following example.
ISL> DISPLAY
Fastsize value is 00000003
[vellip]
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This fastsize value is invalid. You must reset it to "F";
therefore, at the ISL prompt, enter Fastsize F, as in the following example.
If you changed the value of fastsize, you must reset the system for the new value to take effect. For more information on resetting the system, refer to Chapter 2 “Initiating System Activity”.
Listing autoboot file contents |
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To list the contents of the current autoboot file, enter
either LISTAUTOFL or LSAUTOFL at the ISL prompt:
