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There are times when disc drives read out wrong data from DVD/Blu-ray/4K Ultra HD Blu-ray disc but still report they have read the data on the disc successfully rather than report a read error. It is impossible to verify whether the encrypted disc data conform to DVD/Blu-ray/4K Ultra HD Blu-ray specifications, so tools like Imgburn and VSO Inspector without a decrypter cannot tell such a read error made by disc drives. While DVDFab can read the data on a protected disc, decrypt them, recheck whether the data conform to DVD/Blu-ray/4K Ultra Blu-ray specifications and correct the read error, and the whole process is what we called ExactRead.
ExactRead is an exclusive technology of DVDFab applied in the process of copying or ripping protected DVD/Blu-ray/4K Ultra HD Blu-ray disc (relevant products include DVD Copy, DVD Ripper, DVD to Blu-ray Converter, Blu-ray Copy, Blu-ray Ripper, Blu-ray to DVD Converter, UHD Copy, UHD Ripper, UHD to Blu-ray Converter and Hi-Fi Audio Converter). DVDFab first reads the disc data through a disc drive, then decrypts those data, and after that verifies whether the data conform to DVD/Blu-ray/4K Ultra HD Blu-ray specifications. Once DVDFab finds a read error made by the disc drive, it will begin the process of correcting the error.
In the normal reading process, in order to save time, DVDFab would read a lot of data at a time. However, in the process of correcting error, DVDFab would slow down its reading speed and go back to read the error part sector by sector to make sure every datum it reads is correct. If DVDFab fails to correct the read error, a “Read Error” box will pop out to prompt you there is a read error.
Usually, there are three cases that can result in “Read Error”. First, the disc you inserted into your optical drive might have been heavily used, scratched, or severely covered by dirt. For this case, you perhaps can fix the error by cleaning the disc. Here in the answer to How to handle read errors in DVDFab, we have shown you the methods to clean disc. But if the disc is badly damaged, you have to throw it away and buy a new one to replace it.
There is another case that the data on the disc originally are wrong, which means there is no way to fix the disc but to return it to the store where you get it.
The third case is that the quality of your disc drive is not good enough to read the exact disc data. To solve this problem, you need to replace your disc drive with a high performance one.
Here we list some disc drives with better stability and some disc drives with poor performance to help you make a better choice. DVDFab will collect the cases that disc drives read out wrong disc data on the cloud in an anonymous way and update the drive lists occasionally based on the collected information.
(Overall performance in descending order)"HL-DT-ST" "BD-RE BH14NS40" "1.03"
"MATSHITA" "BD-CMB UJ141AF" "1.00"
"PIONEER" "BD-RW BDR-206M" "1.03"
"ASUS" "BC-12D2HT" "1.00"
"HL-DT-ST" "BDDVDRW UH12NS40" “1.00”
"PIONEER" "BD-RW BDR-208" "1.10"
"PIONEER" "BD-RW BDR-209" "1.30"
"PLDS" "DVDRWBD DS-6E2SH" "CD12"
"SONY" "BD RW BDX-S500U" "1.D1"
"hp" "BD DRV BD-5841H5" "1J03"
"MATSHITA" "BD-MLT UJ260AF" "1.00"
"AlViDrv" "BDDVDROM" "3.2c"
"TSSTcorp" "BDDVDW SN-506BB" "GT01"
"BUFFALO" "Optical Drive" "BN11"
"ELBY" "CLONEDRIVE" "1.4"
"PIONEER" "BD-RW BDR-XD05" "2.10"
"HL-DT-ST" "BD-RE BH12NS30" "EL00"
"MATSHITA" "BD-MLT SW-5583" "1.02"
"hp" "BD MLT UJ260AF" "FW06"
Note: The above-mentioned lists are based on the current information we have, they might be updated as we collect more information
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