I started ripping Supernatural series, blu-ray format. Everything has been working well except for 1 disk out of more than a dozen. Season 1 Disk 3 is failing with this error:
Error 'Scsi error - MEDIUM ERROR:L-EC UNCORRECTABLE ERROR' occurred while reading '/BDMV/STREAM/00036.m2ts' at offset '3942316032'
Failed to save title /BDMV/STREAM/00036.m2ts to file /Volumes/MyBook Duo 6TB/Raw Movies/SUPERNATURAL_s01d03/BDMV/STREAM/00036.m2ts
My drive is external, can't have an internal drive because I'm using an Apple MacBook Pro 16" from 2019.
I checked the disk, I don't see any mark or any discoloration that would explain why it's failing. It's brand new directly from Amazon.
Error 'Scsi error - MEDIUM ERROR:L-EC UNCORRECTABLE ERROR' occurred while reading '/BDMV/STREAM/00002.m2ts' at offset '5121767424'
Error 'Scsi error - MEDIUM ERROR:L-EC UNCORRECTABLE ERROR' occurred while reading '/BDMV/STREAM/00002.m2ts' at offset '5122289664'
Error 'Scsi error - MEDIUM ERROR:L-EC UNCORRECTABLE ERROR' occurred while reading '/BDMV/STREAM/00002.m2ts' at offset '5121767424'
Error 'Scsi error - MEDIUM ERROR:L-EC UNCORRECTABLE ERROR' occurred while reading '/BDMV/STREAM/00002.m2ts' at offset '5122289664'
Thanks
Dean
Did you try gently cleaning your disc? The first post on this thread explains that those kind of errors mean the optical drive was unable to correctly read the disc.
MakeMKV, unlike most everything else, uses the built-in hash data on a blu-ray to verify that what it has read off the disc is correct. It only produces output when it has verified that all the data it has read is correct.
A stand alone blu-ray player generally doesn't check. It blows past errors, hoping they're small enough that you don't notice or quickly forget. Using other software on your computer to copy a disc probably didn't check either. So, if the drive read incorrect data, for whatever reason, when you were making an ISO, MakeMKV will detect that error when reading from the ISO.
This feature of MakeMKV is one of its greatest strengths. It is also occasionally maddening.
New here, and slogged through this thread. So far, this is the most helpful explanation, genuine thank you!
IMO it's only a "strength" for use cases where folks want a bit-perfect copy for archival or similar situations. For those of us who are ripping our blu rays for convenience -- e.g. using Plex vs having to juggle discs -- this strict verification is overkill, and counterproductive. As a registered user, I wish this software allowed me to decide how much "blows past errors" I'm willing to accept in my ripped version instead of assuming I can't tolerate a few dropped frames (or even a few janky seconds here and there).
Over the past year I have slowly been working my way through my movie library and have had great success with the majority of my DVD media and a fair amount of my blu-ray collection with little to no problems that I couldn't overcome. That being said I have a few blu-rays that are a thorn in my side. All of Harry Potter 1-6 no problem then 7-8 Error. I went through the disk cleaning process, Updated my drives firmware read through the forum and finally just came to the conclusion that my dive must be bust so I sent it off under warranty and received a new drive only for the problem to percist. This seems to happen to me with 1 out of every 4 blu-ray movies I own. I'd really prefer not to have to buy another drive in hopes that may solve my problems so I'm reaching out for suggestions.
I am having issues getting all the episodes off disks. I have an external disk drive and it is not the same episodes that won't rip each time. The episodes play just fine, I just can't rip them all.
Using direct disc access mode
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading '/VIDEO_TS/VTS_02_1.VOB' at offset '0'
Error 'Scsi error - MEDIUM ERROR:ID CRC OR ECC ERROR' occurred while reading 'DVD+R-DL MATSHITA DVD-RAM UJ8A0AS 1.20 YM54 004995' at offset '0'
Error 'Scsi error - HARDWARE ERROR:TRACK FOLLOWING ERROR' occurred while reading '/VIDEO_TS/VTS_03_1.VOB' at offset '0'
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading 'DVD+R-DL MATSHITA DVD-RAM UJ8A0AS 1.20 YM54 004995' at offset '0'
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading '/VIDEO_TS/VTS_04_1.VOB' at offset '0'
Error 'Scsi error - MEDIUM ERROR:UNRECOVERED READ ERROR' occurred while reading 'DVD+R-DL MATSHITA DVD-RAM UJ8A0AS 1.20 YM54 004995' at offset '0'
Title #1 declared length is 2:56:12 while its real length is 1:48:52 - assuming fake title
Cells 7-7 were removed from title end
Title #2 was added (6 cell(s), 0:42:55)
Cells 7-7 were removed from title end
Title #3 was added (6 cell(s), 0:44:26)
Cells 7-7 were removed from title end
Title #4 declared length is 0:44:24 while its real length is 0:21:21 - assuming fake title
Title #7 in broken titleset was skipped
Title #8 in broken titleset was skipped
Title #9 in broken titleset was skipped
Operation successfully completed
had this on perfect 4K discs of Citizen Kane, Star Wars Episode 2 and 3. Brand new untouched discs. Cleaned, tried multiple times. Same offset every time. So frustrating.
MakeMKV, unlike most everything else, uses the built-in hash data on a blu-ray to verify that what it has read off the disc is correct. It only produces output when it has verified that all the data it has read is correct.
A stand alone blu-ray player generally doesn't check. It blows past errors, hoping they're small enough that you don't notice or quickly forget. Using other software on your computer to copy a disc probably didn't check either. So, if the drive read incorrect data, for whatever reason, when you were making an ISO, MakeMKV will detect that error when reading from the ISO.
This feature of MakeMKV is one of its greatest strengths. It is also occasionally maddening.
New here, and slogged through this thread. So far, this is the most helpful explanation, genuine thank you!
IMO it's only a "strength" for use cases where folks want a bit-perfect copy for archival or similar situations. For those of us who are ripping our blu rays for convenience -- e.g. using Plex vs having to juggle discs -- this strict verification is overkill, and counterproductive. As a registered user, I wish this software allowed me to decide how much "blows past errors" I'm willing to accept in my ripped version instead of assuming I can't tolerate a few dropped frames (or even a few janky seconds here and there).
I agree - this should be OPTIONAL. DVDs often have DELIBERATE Bad Blocks to prevent copying and dollars to donuts if it can be done in Blu-ray, they will. Apps like 'Fairmount' on the Mac were superior because they would copy whatever was readable and this never prevented a movie from being saved.
I had a disk in my 9-1-1 blu ray bootlegs that was resistant, but swapping drives several times and upping the number of retries got me everything copied.
