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

Administering a System: Managing Disks and Files

Managing Swap and Dump

Chapter 6 673

To create a dump logical volume, you ﬁrst use the lvcreate command.

You must set a contiguous allocation policy using the -C y option and

specify no bad block relocation using -r n. See lvcreate (1M) for more

information.

When conﬁguring a logical volume as a dump device, you must next use

lvlnboot (1M) with the -d option to update the BDRA (Boot Data

Reserved Area). The BDRA maintains the information that the kernel

requires about each bootable disk within the root volume group.

Suppose, for example, you have created a logical volume

/dev/vg00/lvol2 for use as a dump area.

To update the boot information, enter:

lvlnboot -d lvol2 /dev/vg00

It is possible to use any secondary swap logical volume as a dump area as

well, provided the swap area is in the root volume group.

To discontinue the use of a currently conﬁgured logical volume as a dump

device, you use lvrmboot (1M) also with the -d option.

CAUTION To prevent possible ﬁle corruption, a dump logical volume (or a swap

logical volume used for dump) must lie within the ﬁrst two GB on the

physical volume. The lvlnboot command will not allow a dump logical

volume to be conﬁgured that exceeds two GB (but it will allow such a

swap logical volume to be so conﬁgured).

Before the above changes to the BDRA take effect, you must either add

(in the case of lvlnboot) or remove (in the case of lvrmboot) the

following line within the system conﬁguration ﬁle (/stand/system by

default) and then reconﬁgure the kernel:

dump lvol

For more information on the system conﬁguration ﬁle, see conﬁg (1M).

After reconﬁguring the kernel, you must reboot the system.