On 9/13/23 04:54, Vincent Lefevre wrote:
Hi,
I need to use ddrescue on the root partition of my laptop.
So I need to have the root partition mounted in read-only mode.
How can I do that?
Note that "mount -o remount,ro /" gives an error "mount point is busy"
apparently because various log files are open in write mode.
Using the recovery mode via GRUB (which mounts / in read-only mode)
is useless because the system remounts it later as rw.
Or is there a way to force a remount in read-only mode?
(I could probably trigger a disk error to make the kernel remount /
as read-only, but well...)
What symptom(s) is your laptop exhibiting that make you think that you
need to use ddrescue(1) on the root partition?
https://en.wikipedia.org/wiki/XY_problem
Have you read the "GNU ddrescue Manual"?
https://www.gnu.org/software/ddrescue/manual/ddrescue_manual.html
David
