Data errors always occur when copying disks, and cyclic redundancy checks are all about

This happens because some data was recorded incorrectly during the burning of the disc, or it is possible that the disc is not compatible with your optical drive, or that the optical drive is physically damaged somewhere and cannot be read. Cyclic redundancy checking (CRC) is a data transmission error detection function that performs polynomial calculations on data and appends the resulting results to the back of the frame, and the receiving device also executes a similar algorithm to guarantee the correctness and integrity of the data transmission. If the CRC verification fails, the system repeatedly copies data to the disk and falls into an endless loop, resulting in the replication process not being completed.

Solution: Notice that some data has actually been copied to the hard disk in the above process, but when some data CRC verification fails, the Windows copy command cannot skip the data and continue to execute. When the operation cannot be completed, the system will delete the data that has been copied to the hard disk, resulting in a complete failure of the copy.

Answer: This question is generally due to the following reasons:

1. Disc data error, if the data is very important, you can try to use badcopy The data error may be a problem with the source disk, or it may be a scratch on the disk!

2. The ability of the optical drive to read the disk is reduced.

3. Disc encryption. Nowadays, many genuine VCDs are anti-copying, and they all take this method!

1470 answers.

I've been struggling with a disc these days, because some of the data on the disc can't be copied, and it always appears.

Unable to Replicate: Data Error (Cyclic Redundancy Check)".

This kind of error,I found a lot of ways on the Internet,Said to use Winrar,Said to use data recovery,Said to use IIS rack server breakpoint resumption,Basically no one is reliable,Finally, I finally found a way to solve this problem。 That's utilization.

ultraiso

Just make the disc into an ISO image file.

ultraiso (green version on the Internet,A lot of single-file versions,Feel free to go down)2.Open it. UltraIso, select File - Open Disc.

3.If it's just a few files, then you can go directly in.

ultraiso

Select the file you need, right-click and extract it to the specified location.

4.If you want to get the entire disc out, then you have the option.

Tools - Make image files to make ISOs

5.Then there's the long waiting time, and when the time is over, your ISO is basically complete, load it with a virtual optical drive or.

winrar

Unzip it and take a look, your files have been saved.

ps: Because of the error on the disc, when extracting the wrong file or making the ISO, it took a long time, I got a ***, 3 G ** file error, it took about 15 hours to make the ISO, so students should be patient.

You can use ONES burning software to make the bad disc into an image file (di), pay attention to check Ignore read errors, after the file is made, burn the created DI file to a blank disc, and finally copy the file on the burned disc.