source: install/autopart.sh @ ab298e7

#!/bin/bash
#Syn-3 diskinit (C)2005 DatuX 
#-partitions all the specified discs for use with syn3
#-erases all the data!
#-automaticly runs initboot and initdata to initialize partitions with raid, lvm and filesystems

.       dialoglib.sh || exit 1

exec 2>&1


######################## clean and partition all disks
# Cleans and partitions all discs for Syn-3 raid.

BOOT_PARTS=
DATA_PARTS=
for DISC in $*; do 
        echo -e "\n* Partitioning disc $DISC:"

        #DISCBASE=`dirname $DISC`

        #remove any existing raid disc superblocks
        #(may fail)
        mdadm --misc --zero-superblock --force $DISC &>/dev/null 
        
        #remove any other confusing stuff on the disc
        dd if=/dev/zero of=$DISC bs=1024k count=1 &>/dev/null 
        
        #Repartitioning. Syn3 uses 2 partions: 
        #partion 1: boot partition (fixed size, mirrored over all disks )
        #partion 2: LVM (rest of the space, mirror + spares)
        if [ "$USE_GPT" ]; then
                # In GPT a "Linux RAID partition" has type A19D880F-05FC-4D3B-A006-743F0F84911E
                echo  -e "size=$SIZE_BOOT, type=A19D880F-05FC-4D3B-A006-743F0F84911E, attrs=LegacyBIOSBootable, bootable\ntype=A19D880F-05FC-4D3B-A006-743F0F84911E"|sfdisk -q -f $DISC --label gpt >/dev/null || exit 1
        else
                # In dos a "Linux RAID partition" has type 0xFD
                echo  -e "size=$SIZE_BOOT, type=FD, bootable\ntype=FD"|sfdisk -q -f $DISC --label dos >/dev/null || exit 1
        fi
        
        #wait for devicenames to be created
        udevadm settle
        
        #determine partitions names
        PART1=`listpartitions $DISC | head -1`
        PART2=`listpartitions $DISC | head -2 | tail -1`
        
        #remove raid partition superblocks
        #(may fail)
        mdadm --misc --zero-superblock --force "$PART1" &>/dev/null 
        mdadm --misc --zero-superblock --force "$PART2" &>/dev/null 
        
        #remove other confusing stuff thats in the partition            
        dd if=/dev/zero of="$PART1" bs=4k count=1 &>/dev/null || exit 1
        dd if=/dev/zero of="$PART2" bs=4k count=1 &>/dev/null || exit 1

        #remember this parition for later
        BOOT_PARTS="$BOOT_PARTS $PART1"
        DATA_PARTS="$DATA_PARTS $PART2"
done

./initboot.sh $BOOT_PARTS || exit $?
./initdata.sh $DATA_PARTS || exit $?

echo -e "\n* DONE"
#release the flying monkeys:
exit 0