When I attempt to fix the problems from the boot cd and runcryptsetup luksOpen /dev/sda3 cryptLVM, I get “not a valid LUKS device”.
Can I simply reformat Luks? What are my concerns right now if I don't need to save data?
It means what it says.A luks device has what is called a "luks header".The header contains information necessary to open the volume.The header in that device is corrupt and hence the volume is no longer a luks volume.
Latest versions of cryptsetup has an ability to correct some corruptions but not all.You can try to see if it can repair your corrupted volume.
Did you create a luks header backup? If not then your data is toasted and lost forever. You can simply reformat and move on but your old data will be gone.
Make a back up of the header after you reformat.Restoring a header from a backup is the only way to recover from the error you got.
Latest versions of cryptsetup has an ability to correct some corruptions but not all.You can try to see if it can repair your corrupted volume.
Did you create a luks header backup? If not then your data is toasted and lost forever. You can simply reformat and move on but your old data will be gone.
Make a back up of the header after you reformat.Restoring a header from a backup is the only way to recover from the error you got.
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