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The *.qtr files are qemu trace files, produced using the unofficial
patch in the current directory.

- guestfish-N-fs-10M.qtr

  The command 'guestfish -N fs:ext2:10M' before we modified the
  part-disk API to align the partition to 64 sectors.

- guestfish-N-fs-10M-aligned-part-disk.qtr

  The command 'guestfish -N fs:ext2:10M' after we modified the
  part-disk API to align the partition to 64 sectors.

- guestfish-add-mount.qtr

  $ guestfish -a test1.img -m /dev/sda1
  where test1.img was created by the previous command.

- guestfish-write-hello.qtr

  $ guestfish -a test1.img -m /dev/sda1 write /hello "hello, world."
  Note that the trace includes the adding and mounting operations.