#!/bin/sh
set -e
modprobe scsi_debug dev_size_mb=300
cat <<EOF | sfdisk /dev/sdb
label: dos
label-id: 0x691d3908
device: /dev/sdb
unit: sectors

/dev/sdb1 : start=        2048, size=      307200, type=83
/dev/sdb2 : start=      309248, size=      305152, type=83
EOF
sync
udevadm settle

# option 1:
mkfs.btrfs /dev/sdb1 /dev/sdb2

# option 2:
#mkfs.btrfs /dev/sdb1
#mount /dev/sdb1 /mnt
#btrfs device add /dev/sdb2 /mnt

blkid -p /dev/sdb1
blkid -p /dev/sdb2

#sleep 5
#rmmod scsi_debug