Creating boot images

To install the base operating system or to access a system that will not boot from the system hard drive, you need a boot image. This procedure describes how to create boot images. The boot image varies for each type of device.

When the system is first installed, the bosboot command creates a boot image from a RAM (random access memory) disk file system image and the operating system kernel. The boot image is transferred to a particular media such as the hard disk. When the machine is rebooted, the boot image is loaded from the media into memory. For more information about the bosboot command, see bosboot.

The associated RAM disk file system contains device configuration routines for the following devices:

  • Disk
  • Tape
  • CD-ROM
  • Network Token-Ring, Ethernet, or FDDI device
  • You must have root user authority to use the bosboot command.
  • The /tmp file system must have at least 20 MB of free space.
  • The physical disk must contain the boot logical volume. To determine which disk device to specify, type the following at a command prompt:
    lsvg -l rootvg
    The lsvg -l command lists the logical volumes on the root volume group (rootvg). From this list you can find the name of the boot logical volume.
    Then type the following at a command prompt:
    lsvg -M rootvg
    The lsvg -M command lists the physical disks that contain the various logical volumes.