Solaris 10 x86 - Grub not loading

I have a Solaris 10x86 install which failed all attempts after a reboot with ZFS

After a lot of trial and error, I finally did the below from the Grub menu and it worked.

grub> find /sbin/init
grub> root (hd1,0,a)  <<---this a="" command.="" find="" hd1="" is="" of="" output="" p="" the="">grub> kernel$ /platform/i86pc/multiboot -B $ZFS-BOOTFS
grub>module /platform/i86pc/boot_archive
grub> boot

An example of the menu.lst at /rpool/boot/grub/menu.lst

#---------- ADDED BY BOOTADM - DO NOT EDIT ----------
title Solaris 10 10/09 s10x_u8wos_08a X86
findroot (pool_rpool,0,a)
kernel$ /platform/i86pc/multiboot -B $ZFS-BOOTFS
module /platform/i86pc/boot_archive
#---------------------END BOOTADM--------------------
#---------- ADDED BY BOOTADM - DO NOT EDIT ----------
title Solaris failsafe
findroot (pool_rpool,0,a)
kernel /boot/multiboot -s
module /boot/amd64/x86.miniroot-safe
#---------------------END BOOTADM--------------------