A question about drives not reading all media

vbimport

#1

Why is it that some machines will be able to read DVD-R and not DVD+R?

And if a drive starts failing to read media that is was able to previously is this the drive or firmware?


#2
  1. ‘Machines’ are not drives. This is because older ones do not support all formats.

  2. The pickup/drive, not the firmware!


#3

The compatibility bits at the lead-in section of a disc do not contain same value as a DVD-ROM.

Signs of a defective read head. Consider replacement.

:cool: :cool: