On Sat, Nov 22, 2025 at 10:46:39AM -0700, home user via users wrote: > (responding to 6 posts) > > I have a couple of short (I hope) questions while I try on the new desktop > to see if the new drive sees the older back-up.� This will take a while.� > Meanwhile, the 2 questions... > * Is "ddrescue" a good thing to try on a blu-day data disc? > * Do I first need to mount a blu-ray before attempting "ddrescue"? >
ddrescue lets you read and continue reading from the device even if a read fails, unlike dd that will just stop if it gets a failed read. You can simply try "dd" to start with. If you get errors also check log / journalctl output for errors. Also check "lsblk" output. blu-ray discs already have a lot of error recovery built into them, so ddrescue might not help much. If the disc shows up and you can't read it, it could be an issue with the hardware itself. Be sure to also try using another bluray device (if you haven't already, not sure exactly what you've tried so far). No you don't need to mount a device and should not mount it if you want to write to it using dd. I think open for writing to a device might fail if it's mounted but I don't have a device to test it on. -- Patrick -- _______________________________________________ users mailing list -- [email protected] To unsubscribe send an email to [email protected] Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/[email protected] Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
