HP Visualize J5000 hp Visualize J5000, J7000 workstations service handbook (a4 - Page 55

Dealing with a Boot Failure, Bootable Media.

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Troubleshooting Dealing with a Boot Failure Dealing with a Boot Failure To start this workstation from an operating system stored on a device different from the usual boot device, to boot from a different disk, or to boot from another type of device (such as an alternate hard disk or CD), see the following situations and examples that use the Boot Console Handler. To access the Boot Console Handler, and for details on using it, see Chapter 5 of this handbook. • To boot from a known device containing a bootable operating system, type the following at the prompt: Main Menu: Enter command > boot device [Enter] where device is the hardware path to the device, specified in Mnemonic Style Notation. For example, to boot an operating system stored on a DDS-format tape in a drive located at scsi.1.0, go to the Main Menu of the Boot Console Handler and then type the following command at the prompt: Main Menu: Enter command > boot scsi.1.0 [Enter] The operating system on the specified device is used to start the workstation. • To interact with the Initial System Loader (ISL) before booting the workstation, type the following at the prompt: Main Menu: Enter command > boot device [Enter] You are prompted: Interact with ISL (Y or N) > y [Enter] Answering yes (y) causes the ISL to be loaded from the specified device. After a short time, the following prompt appears on the screen: ISL> ISL is the program that actually controls the loading of the operating system. By interacting with ISL, you can choose to load an alternate version of the HP-UX operating system. For example, if the usual kernel (/stand/vmunix) on the root disk has become corrupted, boot the workstation from the backup kernel (/stand/vmunix.prev) by typing the following at the ISL> prompt: ISL> hpux /stand/vmunix.prev [Enter] • To find the location of the bootable operating systems on the various media in the file system, use the search ipl command. See the next subsection, "Searching for Bootable Media." Chapter 3 51

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Chapter 3
51
Troubleshooting
Dealing with a Boot Failure
Dealing with a Boot Failure
To start this workstation from an operating system stored on a device different from the
usual boot device, to boot from a different disk, or to boot from another type of device (such
as an alternate hard disk or CD), see the following situations and examples that use the
Boot Console Handler. To access the Boot Console Handler, and for details on using it, see
Chapter 5 of this handbook.
•
To boot from a known device containing a bootable operating system, type the following
at the prompt:
Main Menu: Enter command > boot
device
[Enter]
where
device
is the hardware path to the device, specified in Mnemonic Style
Notation.
For example, to boot an operating system stored on a DDS-format tape in a drive
located at
scsi.1.0
, go to the Main Menu of the Boot Console Handler and then type
the following command at the prompt:
Main Menu: Enter command > boot scsi.1.0 [Enter]
The operating system on the specified device is used to start the workstation.
•
To interact with the Initial System Loader (ISL) before booting the workstation, type
the following at the prompt:
Main Menu: Enter command > boot
device
[Enter]
You are prompted:
Interact with ISL (Y or N) > y [Enter]
Answering yes
(y)
causes the ISL to be loaded from the specified device. After a short
time, the following prompt appears on the screen:
ISL>
ISL is the program that actually controls the loading of the operating system. By
interacting with ISL, you can choose to load an alternate version of the HP-UX
operating system.
For example, if the usual kernel (
/stand/vmunix
) on the root disk has become
corrupted, boot the workstation from the backup kernel (
/stand/vmunix.prev
) by
typing the following at the
ISL>
prompt:
ISL> hpux /stand/vmunix.prev [Enter]
•
To find the location of the bootable operating systems on the various media in the file
system, use the
search ipl
command. See the next subsection, “Searching for
Bootable Media.”