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Add support for full allocation (writing zeroes)

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Kroese 2023-04-19 03:19:52 +02:00 committed by GitHub
parent 970502ee66
commit c068a7bedd
1 changed files with 25 additions and 6 deletions
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31
run/disk.sh
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@ -66,7 +66,7 @@ if [ ! -f "${DATA}" ]; then
# Create an empty file # Create an empty file
if [ "$ALLOCATE" != "Y" ]; then if [ "$ALLOCATE" = "N" ]; then
truncate -s "${DATA_SIZE}" "${DATA}" truncate -s "${DATA_SIZE}" "${DATA}"
@ -80,16 +80,35 @@ if [ ! -f "${DATA}" ]; then
echo "ERROR: Specify a smaller size or disable preallocation with ALLOCATION=N." && exit 86 echo "ERROR: Specify a smaller size or disable preallocation with ALLOCATION=N." && exit 86
fi fi
if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then if [ "$ALLOCATE" = "F" ]; then
rm -f "${DATA}"
echo "ERROR: Could not allocate a file for the virtual disk." && exit 87
fi
MB=$(( (DATA_SIZE + 1048575)/1048576 ))
echo "INFO: Writing ${MB} MB of zeroes, please wait.."
dd if=/dev/zero of="${DATA}" count="${MB}" bs=1M
truncate -s "${DATA_SIZE}" "${DATA}"
else
if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
rm -f "${DATA}"
echo "ERROR: Could not allocate a file for the virtual disk." && exit 87
fi
fi
fi fi
# Check if file exists # Check if file exists
if [ ! -f "${DATA}" ]; then if [ ! -f "${DATA}" ]; then
echo "ERROR: Virtual DSM data disk does not exist ($DATA)" && exit 88 echo "ERROR: Virtual disk does not exist ($DATA)" && exit 88
fi
# Check the filesize
SIZE=$(stat -c%s "${DATA}")
if [[ SIZE -ne DATA_SIZE ]]; then
rm -f "${DATA}"
echo "ERROR: Virtual disk has the wrong size: ${SIZE}" && exit 89
fi fi
# Format as BTRFS filesystem # Format as BTRFS filesystem