Booting RAID1 through SILO on SPARC64

Boot 2.4 livecd
Create big partitions sda1 and sdb1 of type fd
Join these in a RAID 1, /dev/md0
Format partitions as ext3
Install gentoo, with 2.6.x kernel
Install silo

Contents /etc/silo.conf:
#BEGIN
partition = 1
root = /dev/md0
timeout = 50

image = /boot/kernel-2.6.7
  label = Linux
#END

Contents /etc/silo.conf.sda
#BEGIN
partition = 1
root = /dev/sda1
timeout = 50

image = /boot/kernel-2.6.7
  label = Linux
#END

Contents /etc/silo.conf.sdb
#BEGIN
partition = 1
root = /dev/sdb1
timeout = 50

image = /boot/kernel-2.6.7
  label = Linux
#END

In root of filesystem, do
ln -s /etc/silo.conf silo.conf.sda
ln -s /etc/silo.conf silo.conf.sdb

Exit chroot
Unmount and stop raid

Mount and run silo:
#For sda
mount -t ext3 /dev/sda1 /mnt/gentoo
cd /mnt/gentoo
./sbin/silo -r /mnt/gentoo -C etc/silo.conf.sda
cd /
umount /mnt gentoo

#For sdb
mount -t ext3 /dev/sdb1 /mnt/gentoo
cd /mnt/gentoo
./sbin/silo -r /mnt/gentoo -C etc/silo.conf.sdb
cd /
umount /mnt gentoo

And reboot, SILO will load and read /silo.conf.sdx,
which points to /etc/silo.conf and it will send root=/dev/md0
to the kernel.

When installing new kernels, just update /etc/silo.conf
and reboot. No need to rerun SILO.

If you have a (RAID1) /boot partition, put silo.conf there and make
/etc/silo.conf a symlink to it. Also make the silo.conf.sdx symlinks
in /boot to /boot/silo.conf.