10000 sfdisk --move-data dropping msdos partition · Issue #3568 · util-linux/util-linux · GitHub
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champtar opened this issue May 13, 2025 · 0 comments
Open

sfdisk --move-data dropping msdos partition #3568

champtar opened this issue May 13, 2025 · 0 comments

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@champtar
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Here a reproducer on my Fedora 42 (util-linux-2.40.4-7.fc42.x86_64 / parted-3.6-11.fc42.x86_64):

truncate -s100G ./testdisk

parted -s ./testdisk -- mklabel msdos \
  mkpart primary ext3 2MiB 130MiB \
  set 1 boot on \
  mkpart extended 256MiB 100% \
      set 2 lba off \
  mkpart logical ext4 1GiB 9GiB \
  mkpart logical ext4 10GiB 18GiB \
  mkpart logical ext4 19GiB 30GiB \
  mkpart logical ext4 31GiB 100%

# resize2fs ...
echo ',-8G' | sfdisk --lock ./testdisk -N8
echo '+8G,' | sfdisk --move-data --lock ./testdisk -N8
sfdisk -l ./testdisk
# partition 8 still present

echo '+8G,' | sfdisk --move-data --lock ./testdisk -N7
sfdisk -l ./testdisk
# see that partition 8 was dropped (despite showing up in 'New situation')

echo '+4G,' | sfdisk --move-data --lock ./testdisk -N6
sfdisk -l ./testdisk
# see that partition 7 was dropped (despite showing up in 'New situation')

Doing the same with gpt partition table works fine

truncate -s100G ./testdisk

parted -s ./testdisk -- mklabel gpt \
  mkpart primary ext3 2MiB 130MiB \
  mkpart primary fat32 131MiB 512MiB \
  set 2 esp on \
  mkpart primary ext3 800MiB 850MiB \
  mkpart primary ext3 850MiB 900MiB \
  mkpart primary ext4 1GiB 9GiB \
  mkpart primary ext4 10GiB 18GiB \
  mkpart primary ext4 19GiB 30GiB \
  mkpart primary ext4 31GiB 100%

# ...

This also affects 2.38.1 (Debian)
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