Managing Systems and Workgroups: A Guide for HP-UX System Administrators

Configuring a System
Reconfiguring the Kernel (HP-UX 11i Version 2)
Chapter 3 361
Dump Devices
Each kernel configuration is allowed to have any number of dump
devices. These are devices to which a system crash dump should be
written, if a system crash occurs. The dump devices specified in the
kernel configuration are typically only used during the boot process; once
the boot process completes, the system uses the dump devices specified in
/etc/fstab instead. See crashconf (1M) for more details.
Dump devices are specified in a system file as lines with the following
forms:
dump deviceID
dump lvol
dump none
dump default
Any number of such lines can be specified. If no such lines are specified,
dump default is assumed.
The first form explicitly identifies the disk device to use for crash dumps.
The disk device may not contain a file system, and must not be an LVM
or VxVM physical volume. Disks are presently identified using hardware
paths (see ioscan (1M) for details), but this may change in future HP-UX
releases.
The second form (dump lvol) specifies that the crash dump devices are
logical volumes in the root LVM volume group, and that the lvlnboot
command has been used to identify the logical volume(s). See lvlnboot
(1M).
The third form (dump none) specifies that there should be no crash dump
device. The system will be unable to save crash dump information in the
event of a system crash.
The fourth form (dump default) specifies the default behavior. Crash
dumps will be written to the primary swap device. Using the same device
for primary swap and for crash dumps is common and accepted.
Device Driver Specifications
Most of the time, the system can correctly choose the device driver
module that should control each hardware device in your system. In
some circumstances, you may need to force a particular hardware device
to be controlled by a particular device driver module. If so, you can