Re: frequent disk error, need guidance

On Sat, 15 Apr 2023 12:25:07 -0700, Gary Aitken wrote:
> mount /dev/ada1p2 /mnt/newsys
> cd /mnt/newsys
> dump -0 -f - /dev/ada0p2 | restore -r -Dv -f -
> 
> However... this is a running system, which seems unlikely to produce
> a consistent result.

Just a little trick:

	# cd /mnt/newsys
	# dump -Lauf0 - /dev/ada0p2 | restore -rf -

On a running system, using -L is never wrong. But if
you can, unmount /dev/ada0p2 (source partition), or
at least have it mounted read-only.



> There are only 2 sata slots on the mobo, so I can't mount a third
> system, although I might be able to build a memstick and use that.

Or a "USB converter" for SATA disks.



> Can I reboot in a read-only manner and do the above?

You _should_ do that. But dump's -L flag works, too.



> Never done that, not sure what's involved.
> Is single-user mode sufficient?

Not just sufficient, it's actually _recommended_.
Have as few interfering parts as possible.




-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...