EAGLE EYE BLU RAY 'BACK-UP FAILED'

[rdb71]

Just tried to back-up mu copy of Eagle Eye on Bly Ray and about half way through got the error message 'Back-Up Failed'
Any suggestions as to what might have happened would be much appreciated
Below is the log from the back-up.
Cheers rdb71

MakeMKV v1.6.10 darwin(x86-release) started
Automatic checking for updates is enabled, you may disable it in preferences if you don't want MakeMKV to contact web server.
Optical drive "DVD+R-DL OPTIARC DVD RW AD-5690H 4AH5" opened in OS access mode.
It's highly recommended to install DASPI kernel extension to improve performance.
Optical drive "BD-RE HL-DT-ST BD-RE BE08LU20 2.00" opened in OS access mode.
Backing up disc into folder "/Volumes/BLU RAY 1/EAGLE EYE"
Evaluation version, 30 day(s) out of 30 remaining
Loaded content hash table, will verify integrity of M2TS files.
Error 'Posix error - Input/output error' occurred while reading '/BDMV/STREAM/00000.m2ts' at offset '9606985728'
Backup failed

[mike admin]

Error 'Posix error - Input/output error' occurred while reading '/BDMV/STREAM/00000.m2ts' at offset '9606985728'

This is a physical disc error. To get more details please install DASPI driver.

[rdb71]

Error 'Posix error - Input/output error' occurred while reading '/BDMV/STREAM/00000.m2ts' at offset '9606985728'

This is a physical disc error. To get more details please install DASPI driver.

So possibly a scratch on the disc. I'll install that driver, thanks for your help