1a8f9ca2e3
* Avoid waiting for external drive unnecessarily Even though the condition to start hassos-data.service is not met (the file /mnt/overlay/data-move is not there by default), it seems that systemd waits for the dependencies for hassos-data.service. Don't Require or Wants any dependencies which might not be present by default. * Use systemd to wait for partition using partlabel device * Use sfdisk which allows to wipe filesystem signatures Even though we zap the partition table using sgdisk, the file system superblock (which contains the file system label) does survive. This can cause problems when trying to reuse a disk previously already labeled using hassos-data: It might take precendence on next boot over the existing data partition on the eMMC. Make sure to clean all file system signatures using sfdisk.
75 lines
2.4 KiB
Bash
Executable File
75 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
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# ==============================================================================
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# Home Assistant OS data partition handling
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# ==============================================================================
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set -e
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# Use current mount point. This avoids "Can't be the same disk!" error
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# when using a drive which has been used as a data drive previously.
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DATA_DEVICE_CHILD="$(findmnt --noheadings --output=source /mnt/data)"
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DATA_DEVICE_ROOT="/dev/$(lsblk -no pkname "${DATA_DEVICE_CHILD}")"
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if [ "${DATA_DEVICE_ROOT}" = "" ]; then
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echo "[ERROR] Data disk device not found!"
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exit 1
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fi
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# Move command
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if [ "${1}" = "move" ] && [ -e "${2}" ]; then
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NEW_DEVICE_ROOT="${2}"
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# Check device
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if ! lsblk "${NEW_DEVICE_ROOT}" | grep disk > /dev/null 2>&1; then
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echo "[ERROR] Is not disk!"
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exit 1
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elif [ "${NEW_DEVICE_ROOT}" = "${DATA_DEVICE_ROOT}" ]; then
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echo "[ERROR] Can't be the same disk!"
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exit 1
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fi
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# Flag device
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echo "WARNING: All partitions on ${NEW_DEVICE_ROOT} will be deleted!"
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printf "Enter \"yes\" to confirm: "
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read -r confirm
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if [ "${confirm}" != "yes" ]; then
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echo "Aborting."
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exit 1
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fi
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# Create GPT partition table with a single data partition
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cat << EOF | sfdisk --wipe-partitions=always --wipe=always "${NEW_DEVICE_ROOT}"
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label: gpt
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uuid=a52a4597-fa3a-4851-aefd-2fbe9f849079, type=0FC63DAF-8483-4772-8E79-3D69D8477DE4, name=hassos-data-external
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EOF
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# Since we create a new partition table etc. we are guaranteed the target
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# partition is partition 1
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NEW_DEVICE_PART_SIZE=$(cat "/sys/class/block/$(basename "${NEW_DEVICE_ROOT}")1/size")
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OLD_DEVICE_PART_SIZE=$(cat "/sys/class/block/$(basename "${DATA_DEVICE_CHILD}")/size")
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if [ "${NEW_DEVICE_PART_SIZE}" -lt "${OLD_DEVICE_PART_SIZE}" ]; then
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echo "[INFO] Target device too small!"
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echo "label: gpt" | sfdisk "${NEW_DEVICE_ROOT}"
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exit 1
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fi
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touch "/mnt/overlay/move-data"
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cat << EOF
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Disk ${NEW_DEVICE_ROOT} has been prepared to be used as data drive and the data
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move has been scheduled for the next reboot. Please reboot the device now and
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make sure to leave the disk connected to the system from now on.
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EOF
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else
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cat << EOF
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Usage: datactl move <device>
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Moves data partition to external device provided by <device> (without partition
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number). A new partition table and a partition for the complete device will be
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created by datactl.
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EOF
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fi
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