Read errors followed by "Backup Done"

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rkjnsn
Posts: 17
Joined: Tue Aug 24, 2010 7:03 am

Read errors followed by "Backup Done"

Post by rkjnsn »

Quick question:

If I see the following…

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Backing up disc into folder "…"
Loaded content hash table, will verify integrity of M2TS files.
Encountered 9 errors of type 'Read Error' - see http://www.makemkv.com/errors/read/
Backup done
Does that indicate any problem with the backup, or does "Backup done" mean the backup is good regardless of any preceding messages? (In other words, does "Backup done" imply that all mentioned read errors were successfully retried?)
Billycar11
Posts: 4349
Joined: Sun Aug 24, 2014 5:49 am

Re: Read errors followed by "Backup Done"

Post by Billycar11 »

no its not good if it says that
it may or may not be playable.
Buy a UHD drive from the guide and how to video maker: https://www.makemkv.com/forum/viewtopic ... 20&t=17831
UHD Drives Guide: https://www.makemkv.com/forum/viewtopic ... 16&t=19634
Auto flash kit $25 Email me for one Billycar5924@gmail.com
rkjnsn
Posts: 17
Joined: Tue Aug 24, 2010 7:03 am

Re: Read errors followed by "Backup Done"

Post by rkjnsn »

Hmm… after further checking, it appears the rip is good.

After doing another rip on a different drive with no reported errors, I ended up with a result that was bit-for-bit identical to the first one, so it appears the 9 reported read errors were all successfully retried in this case (though surely it could have been more explicit about it). (I also verified there was no corruption in the m2ts streams.) Indeed, when there's an uncorrected error, MakeMKV seems to indicate the exact file with the error, e.g.,

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Error 'Scsi error - MEDIUM ERROR:L-EC UNCORRECTABLE ERROR' occurred while reading '/BDMV/STREAM/01082.m2ts' at offset '1794244608'
Failed to save title /BDMV/STREAM/01082.m2ts to file …/BDMV/STREAM/01082.m2ts
or

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Hash check failed for file 01080.m2ts at offset 903014400, file is corrupt.
Hash check failed for file 01080.m2ts at offset 903211008, file is corrupt.
Hash check failed for file 01080.m2ts at offset 907339776, file is corrupt.
Hash check failed for file 01080.m2ts at offset 907536384, file is corrupt.
Hash check failed for file 01080.m2ts at offset 907929600, file is corrupt.
Too many hash check errors in file 01080.m2ts.
Hash check for /BDMV/STREAM/01080.m2ts : 0.45% corrupt, 99.54% correct, 99.99% checked.
followed by

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Backup done but 2 files failed hash check
instead of just "Backup done".
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