Conversion to ext4 hangs on fsremap

[sivapvarma]

System is a custom PC with Manjaro, Ubuntu and Windows 10. I'm trying to fix my corrupted ubuntu home partition of 1.8TB with 1.1TB of data.

I ran

$ sudo fsck.ext4 -vy /dev/sdc2

This fixed most of the issues, all of my data was still there. I was able to mount it in my manjaro and read it. But the file system was not recognizing it as a ext4 partition so I ran,

$ sudo fstransform /dev/sdc2 ext4

fstransform hangs on job.3. I see a huge fstransform.loop.4143 file which I assume is where my data is at.

This screenshot below is from my Manjaro where I ran fstransform from.

I tried resuming multiple times and each time my system hangs with no keyboard or mouse response exactly at this point.

[cosmos72]

Hi @sivapvarma,

fstransform mounts the partition as one of the first steps to convert it.
Attempting to convert a filesystem with errors is destined to cause a lot of problems, including kernel hangs (many filesystem drivers are not resistant to damaged filesystems) and further damage to the filesystem itself.

In this case, a better alternative would be dd_rescue (if the disk itself has bad sectors) or a simple copy or backup.

I see a huge fstransform.loop.4143 file which I assume is where my data is at.

Correct. It's a loop file i.e. it contains a whole filesystem that you can check for errors and mount