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feat: create sparse images #722

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feat: create sparse images #722

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4 changes: 2 additions & 2 deletions modules/disk.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,7 @@ disk_get_part_nums() {
# $3 - size (in 512 blocks)
# $4 - path to output file
disk_extract_part() {
run_and_log_cmd "dd if=$1 of=$4 skip=${2}b bs=1M count=${3}b status=none iflag=count_bytes,skip_bytes"
run_and_log_cmd "dd if=$1 of=$4 skip=${2}b bs=1M count=${3}b status=none conv=sparse iflag=count_bytes,skip_bytes"
}

# Convert MiB to number of 512 sectors
Expand Down Expand Up @@ -98,7 +98,7 @@ disk_align_sectors() {
# $2 - destination file
# $3 - offset in number of 512 sectors
disk_write_at_offset() {
run_and_log_cmd "dd if=${1} of=${2} seek=${3} conv=notrunc status=none"
run_and_log_cmd "dd if=${1} of=${2} seek=${3} bs=512 conv=notrunc,sparse status=none"
}

# Create file system image from directory content
Expand Down