www.makemkv.com

First time using this program...this and Handbrake are only working on 2 of 4 episodes of Clone Wars DVD. Getting following code...ideas? I am a newbie!

MakeMKV v1.7.10 darwin(x86-release) started
Optical drive "DVD+R-DL MATSHITA DVD-R UJ-875 DB09" opened in DASPI v1.3 mode.
Using direct disc access mode
Title #0 was added (20 cell(s), 1:30:13)
Title #2 was added (4 cell(s), 0:22:30)
Title #3 was added (5 cell(s), 0:22:34)
Title #4 was added (5 cell(s), 0:22:35)
Title #5 was added (5 cell(s), 0:22:34)
Title #6 has length of 113 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #7 was added (1 cell(s), 0:12:42)
Title #8 has length of 12 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #9 has length of 16 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #10 was added (1 cell(s), 0:04:19)
Title #11 has length of 103 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Subtitle stream #3 is identical to stream #2 and was skipped
Subtitle stream #4 is identical to stream #2 and was skipped
Operation successfully completed
Saving 7 titles into directory /Users/lauraperkins/Movies/STARWARS_CLONE_WARS_S2_DISC_1
Error 'Scsi error - HARDWARE ERROR:TRACK FOLLOWING ERROR' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '48340992'
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '525477888'
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '525608960'
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '525608960'
Failed to save title 0 to file /Users/lauraperkins/Movies/STARWARS_CLONE_WARS_S2_DISC_1/title00.mkv
Error 'Scsi error - MEDIUM ERROR:NO SEEK COMPLETE' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '67807232'
Error 'Scsi error - HARDWARE ERROR:TRACK FOLLOWING ERROR' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '68069376'
Error 'Scsi error - MEDIUM ERROR:NO SEEK COMPLETE' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '68102144'
Error 'Scsi error - MEDIUM ERROR:NO SEEK COMPLETE' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '68102144'
Failed to save title 1 to file /Users/lauraperkins/Movies/STARWARS_CLONE_WARS_S2_DISC_1/title01.mkv
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '526821376'
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '526821376'
Failed to save title 3 to file /Users/lauraperkins/Movies/STARWARS_CLONE_WARS_S2_DISC_1/title03.mkv
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '541982720'
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '541982720'
Failed to save title 4 to file /Users/lauraperkins/Movies/STARWARS_CLONE_WARS_S2_DISC_1/title04.mkv
Track #2 turned out to be empty and was removed from output file
Track #2 turned out to be empty and was removed from output file
3 titles saved, 4 failed

The drive can't read the disc.

Your drive manufacturer is notorious for making poor quality drives, so it could be that. Or the disc could be damage/dirty/poorly pressed.

Try swapping it for a new one. If that doesn't work, I'd consider buying a nice quality external drive for your laptop.