| #!/bin/sh |
| # Wipe /dev/sda, create partitions and filesystems |
| # |
| # Partition layout |
| # /dev/sda1 mounted at /var/media ext4, size (remaining space) |
| # /dev/sda2 mounted at /var/backup ext4, size 512MB |
| |
| # All sizes in blocks (1KB) |
| |
| . /etc/utils.sh |
| |
| set -e |
| DEV_FILE=$(find_sata_blkdev) |
| BACKUP_PART_SIZE=$((512*1024)) |
| MEDIA_PART_START=4 # Align to 4KB boundary |
| FORCE=0 |
| |
| [ -b $DEV_FILE ] || exit 1 |
| [ "$1" = "-f" ] && FORCE=1 |
| |
| if [ $FORCE != 1 ]; then |
| sdasha1sum=$(dd if=$DEV_FILE bs=1024 count=1024 2>/dev/null | sha1sum | |
| while read a junk; do echo $a; done) |
| if [ $sdasha1sum != 3b71f43ff30f4b15b5cd85dd9e95ebc7e84eb5a3 ]; then |
| echo "$DEV_FILE is not an empty disk. Use -f to force wiping." 1>&2 |
| exit 1 |
| fi |
| fi |
| |
| TOTAL_SIZE=$(sfdisk -s $DEV_FILE) |
| MEDIA_PART_SIZE=$(( (TOTAL_SIZE - BACKUP_PART_SIZE - 4) / 4 * 4 )) # Align to 4KB boundary |
| BACKUP_PART_START=$((MEDIA_PART_START + MEDIA_PART_SIZE)) |
| |
| echo Partitioning $DEV_FILE |
| sfdisk -q -L -u B $DEV_FILE <<EOF |
| $MEDIA_PART_START,$MEDIA_PART_SIZE |
| $BACKUP_PART_START, |
| EOF |
| |
| create_fs() { |
| echo Creating filesystem in $1 |
| mkfs.ext4 -b 4096 -i 16384 -O extent,flex_bg,large_file $1 |
| } |
| |
| create_fs ${DEV_FILE}1 |
| create_fs ${DEV_FILE}2 |
