NAME
installboot —
install a bootstrap on an FFS
filesystem partition
SYNOPSIS
installboot |
[-nv] bootblk
device |
DESCRIPTION
installboot prepares an FFS filesystem
partition for boot-strapping from the PROM. The sparc64 boot process is
split into two parts: a small first-stage bootblock that is written into the
superblock area of a partition (and hence is limited in size to SBSIZE -
DEV_BSIZE bytes), and a second-stage boot program that resides in the
filesystem proper. The first-stage bootblock is loaded into memory by the
PROM. After it receives control, it loads the second-stage boot program
ofwboot from the filesystem. The second-stage boot
program uses the device driver interface to the PROM and the stand-alone
filesystem code in “libsa.a” to locate and load the kernel.
The first-stage bootblock and second-stage boot program can be found in
/usr/mdec/bootblk and
/usr/mdec/ofwboot respectively. The second-stage
boot program commonly resides in the root directory as
/ofwboot.
The options are as follows:
-n- Do not actually write anything on the disk.
-v- Verbose mode.
The arguments are:
- bootblk
- The name of the file containing the first-stage bootblock.
- device
- The name of the raw device in which the first-stage boot program is to be installed. This should correspond to the block device on which the file system containing ofwboot is mounted.
EXAMPLES
The following commands will install the first-stage bootblock in the root filesystem (assumed to be mounted on “sd0a”) using the file /ofwboot as the second-stage boot program:
# cp /usr/mdec/ofwboot /ofwboot # /usr/mdec/installboot /usr/mdec/bootblk sd0a
SEE ALSO
HISTORY
The installboot first appeared in
NetBSD 1.1.