As of yet, still cant set write permissions
for *my* taste: that is still fine
*I* wouldn't try to use, esp. write to, the drive any further, until you have a backup !
no friend handy with a spare drive ?
or some cloud storage ?
I guess there is less chance to not reformat the disk !
what do you think the issue actually is?
your filesystem, esp. superblocks are damaged.
AFAIK, superblocks are backup copies of the partition table.
damaged superblocks could lead to data loss.
so what could damages superblocks ?
- faulty treatment with wrong tools not made for that filesystem
- ...
- disk is dying => bad blocks
for the last (adjust X, should be "b")
sudo smartctl -t long /dev/sdX
and
after the date/time the first command wrote out !
a subseq.
sudo smartctl -a /dev/sdX
might tell what's up with drive ...
be aware: keep the box running (no sleep mode or such) !
Alternative tool:
"SeaTools Bootable" !