HP 3000 Manuals

System Startup, Configuration, and Shutdown Reference Manual

Boot Paths and Required LDEV Numbers 

When the system is powered up or reset, the processor-dependent code
(PDC) and input/output-dependent code (IODC) routines read and initialize
the paths needed to boot up the system.  These boot paths consist of the
primary boot path, for booting from disk; the alternate boot path, for
booting from a boot tape; and the console boot path, for determining
whether the system can autoboot without operator intervention.

At system installation, these boot paths are assigned default I/O paths,
which the user may redirect either through the system initialization
prompts or the initial system load (ISL) interface.  For more information
on system initialization and ISL, refer to chapter 3 of this manual.


NOTE  What SYSGEN displays depends on your system's configuration.  The
      examples used to demonstrate IO configurator commands have been
      generated on a Series 925 system, unless otherwise specified, and
      may produce display screens that do not exactly match output from
      your system.


Each device configured for the boot path has been assigned a unique LDEV
number.  An LDEV number identifies a physical device associated with a
system.  Two of the paths require the assignment of a specific LDEV to
the device.  The system master volume must be mounted on LDEV 1 for the
operating system to be booted from disk and LDEV 20 must be assigned to
the system console.

MPE/iX 5.0 Documentation