HPUX boot guide

 HP-UX boot guide
HP-UX  Normal Boot The bootstrap process involves the execution of three software components:

• pdc
• isl
• hpux

pdc Automatic boot processes on various HP-UX systems follow similar general sequences. When power is applied to the HP-UX system processor, or the system Reset button is pressed, the firmware processor-dependent code (pdc) is executed to verify hardware and general system integrity. After checking the hardware, pdc gives the user the option to override the autoboot sequence by pressing the Esc key. A message resembling the following usually appears on the console.      (c) Copyright. Hewlett-Packard Company. 1994.      All rights reserved.      PDC ROM rev. 130.0      32 MB of memory configured and tested.      Selecting a system to boot.      To stop selection process, press and hold the ESCAPE key... If no keyboard activity is detected, pdc commences the autoboot sequence by loading isl and transferring control to it. isl The initial system loader (isl) implements the operating-system-independent portion of the bootstrap process. It is loaded and executed after self-test and initialization have completed successfully. Typically, when control is transferred to isl, an autoboot sequence takes place. An autoboot sequence allows a complete bootstrap operation to occur with no intervention from an operator. While an autoboot sequence occurs, isl finds and executes the autoexecute file which requests that hpux be run with appropriate arguments. Messages similar to the following are displayed by isl on the console:      Booting from: scsi.6  HP 2213A      Hard booted.      ISL Revision A.00.09  March 27, 1990      ISL booting  hpux boot disk(;0)/stand/vmunix hpux hpux, the secondary system loader, then announces the operation it is performing, in this case the boot operation, the device file from which the load image comes, and the TEXT size, DATA size, BSS size, and start address of the load image, as shown below, before control is passed to the image.     Booting disk(scsi.6;0)/stand/vmunix     966616 397312 409688 start 0x6c50 Finally, the loaded image displays numerous configuration and status messages, and passes control to the init process. Single-user Boot A single-user boot in HP-UX is sometimes referred to as an interactive boot or attended mode boot. Pressing the Escape key at the boot banner on an older Series 700 workstation halts the automatic boot sequence, puts you into attended mode, and displays the Boot Console User Interface main menu, a sample of which is below.    Selecting a system to boot.    To stop selection process, press and hold the ESCAPE key.    Selection process stopped.    Searching for Potential Boot Devices.    To terminate search, press and hold the ESCAPE key.    Device Selection    Device Path             Device Type    -------------------------------------------------------------    P0                  scsi.6.0                QUANTUM PD210S    P1                  scsi.1.0                HP      2213A    P2                  lan.ffffff-ffffff.f.f   hpfoobar    b) Boot from specified device    s) Search for bootable devices    a) Enter Boot Administration mode    x) Exit and continue boot sequence       Select from menu: In this case the system automatically searches the SCSI, LAN, and EISA interfaces for all potential boot devices-devices for which boot I/O code (IODC) exists. The key to booting to single-user mode is first to boot to ISL using the b) option. The ISL is the program that actually controls the loading of the operating system. To do this using the above as an example, you would type the following at the Select from menu: prompt: Select from menu: b p0 isl This tells the system to boot to the ISL using the SCSI drive at address 6 (since the device path of P0 is scsi.6.0). After displaying a few messages, the system then produces the ISL> prompt.

Pressing the Escape key at the boot banner on newer Series 700 machines produces the Boot Administration Utility, as shown below.

   Command                            Description    -------                            -----------    Auto [boot|search] [on|off]        Display or set auto flag    Boot [pri|alt|scsi.addr][isl]      Boot from primary, alt or SCSI    Boot lan[.lan_addr][install][isl]  Boot from LAN    Chassis [on|off]                   Enable chassis code    Diagnostic [on|off]                Enable/disable diag boot mode    Fastboot [on|off]                  Display or set fast boot flag    Help                               Display the command menu    Information                        Display system information    LanAddress                         Display LAN station addresses    Monitor [type]                     Select monitor type    Path [pri|alt] [lan.id|SCSI.addr]  Change boot path    Pim [hpmc|toc|lpmc]                Display PIM info    Search [ipl] [scsi|lan [install]]  Display potential boot devices    Secure [on|off]                    Display or set security mode    -----------------------------------------------------------------    BOOT_ADMIN> To display bootable devices with this