partclone.btrfs / size mismatch and error

[limbo127]

Hello,
system.img is a raw file , create lot of data on it, then delete data
=> virtual size if 88G ( sparse file ) , physical size is 28G
on it I've a btrfs filesystem, the data on it is 347M ( after delete the 28G of data test)
so :

npRouen>ls -lash system.img
28G -rw-r--r-- 1 root root 88G Jan 23 16:32 system.img

npRouen>partclone.btrfs -c -d1 -s system.img -O system.clone
Partclone v0.3.32 http://partclone.org
Starting to clone device (system.img) to image (system.clone)
Reading Super Block
Calculating bitmap... Please wait...
done!
File system: BTRFS
Device size: 94.4 GB = 5761841 Blocks
Space in use: 347.1 MB = 21184 Blocks
Free Space: 94.1 GB = 5740657 Blocks
Block size: 16384 Byte
Elapsed: 00:00:02, Remaining: 00:00:00, Completed: 100.00%, Rate: 10.41GB/min,
Current block: 3487913, Total block: 5761841, Complete: 100.00%
Total Time: 00:00:02, Ave. Rate: 10.41GB/min, 100.00% completed!
Syncing... OK!
Partclone successfully cloned the device (system.img) to the image (system.clone)
Cloned successfully.

Now i restore the clone :

npRouen>partclone.btrfs -r -s system.clone -O system.afterclone
Partclone v0.3.32 http://partclone.org
Starting to restore image (system.clone) to device (system.afterclone)
Calculating bitmap... Please wait...
Target partition size(0 MB) is smaller than source(94403 MB). Use option -C to disable size checking(Dangerous).
Partclone fail, please check /var/log/partclone.log !

if i use -C the btrfs is not mountable on system.afterclone

Regards,
Nicolas

[Thomas-Tsai]

Hi,

Could you try option -W to restore an image to a raw file?

or

fallocate -l 100G simulation_partition
losetup /dev/loop0 simulation_partition
partclone.restore -s YOURIMAGE -o /dev/loop0
mount /dev/loop0 /mnt

[limbo127]

Hello,
you're right,
thanks.
Is it possible that -W create a raw sparse file in place of raw flat ?