On 11/21/25 10:13 AM, home user via users wrote:
(F-42 Workstation; gnome)
This past spring, I backed-up some 15-20 GB to an MDISC blu-ray. Now I
need to recover that data.
The optical device is blu-ray. It (supposedly) handles MDISC. It
connects to the desktop via 2 USB ports.
- I tried recovering the data logged in as a regular user, as the admin,
and as root.
- I tried the file browser, Brasero, Gnome CD Master, and K3b. They
either don't see the device, or they see it but don't know there's a
disc in it. Gnome CD Master shows the device's status as "Busy".
- I tried plugging in the device after logging in; I tried plugging it
in before powering up the desktop.
Nothing works.
The "Disks" utility does see the optical drive.
I get no real error messages.
I spent time in the "mount" man page, but could not make sense of it.
I've spent hours on this. How do I recover the back-ups from the blu-
ray disc?
The back-up is recovered. It appears to be intact. Merging of that
back-up with others is in progress.
What I actually did was to use ddrescue, followed by the procedure on
the web that George pointed me to
("https://linuxvox.com/blog/linux-mount-an-iso";).
When the hardware is in a more co-operative mood, then the mount
suggested by Samuel also works.
There are still some possible hardware issues that need to be addressed.
I hope to address those in a separate thread after the holidays.
I thank everyone who tried to help.
I've tagged this thread "SOLVED".
--
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