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Your disk is not reading few files properly
There could be several reasons why your optical disk is not reading. Common issues include a dirty or scratched disk, a malfunctioning optical drive, or compatibility problems with the disk format. Additionally, outdated or missing drivers for the optical drive can also prevent it from reading disks properly. Checking these factors can help identify and resolve the issue.
Download the files in a different program. Or "open" it in a different program.
Reading a disk involves accessing and retrieving data that is already stored on the disk, while writing to a disk involves adding new data or modifying existing data on the disk. Reading does not change the content of the disk, whereas writing alters the information stored on the disk.
if disk is able to read rest of the files then disk is good but there is some problem in that files which are not readable. do one thing just try to copy those files and paste it any location and try to open it . if it is unble then sure that those files are corrupt.
When the information is not given on what the problem are there is not a way to know how to handle them. Knowing what the following problems are will allow someone to know how to handle them.
BURNING
surface of a disk to see if the sectors are capable of correctly reading and writing data
Read/Write Heads
This indicates one of several problems with the boot disk: Possibly not connected properly Possibly not "JUMPERED" properly Possible drive failure Possible disk controller failure Possible disk file corruption.
Kyloias : Disk reading errors probably but you can get that fixed for £30.
clean the disk that's in your ps2