cyclic redundancy check data errors (CRC Errors)

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cyclic redundancy check data errors (CRC Errors)

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Rushman1

Junior Member

4. May 2006 @ 15:27

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I have a plextor PX 716a burner and for some reason when I write a disc and then later on go back to read it back to the hard drive at 98% I get "cyclic redundancy check data errors (CRC Errors)" I am positive it is not the media. I have several bussiness computers and it is only on this one machine. ( I do wedding movies and pictures)I re installed the driver. Has anyone else had this problem. My bussiness machines never get connected to the internet.I have a new burner on order.

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Rushman1

Junior Member

4. May 2006 @ 17:01

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If you have had this problem what did you do to correct it??

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GrandpaBW

AfterDawn Addict

5. May 2006 @ 14:26

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If you can get it to write, then get the CRC errors, it is the media. I can't get my Plextor 716A to write to any +R media, anymore. I am tossing it and getting a BenQ.

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Life is good!
GrandpaBruce - Vietnam Vet - 1970 - 1971
Computer: Intel Core i7-920 Nehalim;Asus P6T Deluxe V2

saugmon

AfterDawn Addict

5. May 2006 @ 17:01

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So you are re-ripping a backup disc for more copies?

Crc errors on backup copies are the result of very bad errors. All backups will contain small errors,usually PIF. Major errors will be the PO errors. If you have plextools,there should be a scanning test to check the quality of those backups that give you crc errors.Nero toolkit's disc quality scan and dvdinfopro will also show those errors on those scans.

Several factors lead to these CRC errors when they are on backups that we try to backup.The key factor is to keep these errors down to a minimum. Key factors in order of most likely:

1) Media quality-low quality media has to be burned slower,at a reduced backup target size,or both.The MID code/s from you media will tell us the quality of your media.You can even get a bad batch,and fake media.

2) Burn speed: Using quality media and a quality drive like you plextor px-716,then slow burning may give you more errors than faster burning.The quality media at the 8x and 16x of taiyo yuden and verbatim were meant to perform better at the faster speed.

3) Paper/sticker labels: They have a greater chance of giving errors.Usually peeling them off fixes them.

4)Keep harddrive defragged

5) Backup target: Again,media quality affects this backup target size. Quality media,I keep my backup target at 4370 mbs.Crap media,I'd set it to 4300 mbs. Keeps from burning the edge.This area is susceptible to uneven dye in crap media.

Quote:
read it back to the hard drive at 98%

Right there tells me that's towards the end of the backups.If that entire disc was burned,then you have a problem with the outer edge with the dye-backup target needs reduced. If it hasn't been burned too close to that edge,then something else is wrong.Again media quality.

6) Burner quality: Plextor's are among the best drives out there.Maybe it's wearing out?

I have some other burners that give me crc errors when I try to re-rip their backups. Mainly my HP 640c. Re-ripping with any of my benqs is no trouble,unless I burn the quality media at 2.4x. Way too many crc errors when burning slow.

Look at that list and see if anything sticks out. Usually comes down to any of those,or combination.There's a lot of other things that I left out.

Edit: Those backups are already encryption free and reduced to the correct size.A more aggressive ripping solution would be Dvd decrypter using Mode ISO read to harddrive/Mode ISO write/locate those MDS files/open/and burn.

If that doesn't work,re-set a couple of the default settings:

CSS- Brute force
I/O- Tick ignore all read errors.

Then give her a try.You'll notice the problem areas when the count down time shoots up.

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HP a1118x-b/athlon 64-3300+/BenQ 1650 BCDC/LG 8163B/Modded Wii/Epson-R300 and Ty Watershields!!!

This message has been edited since posting. Last time this message was edited on 5. May 2006 @ 17:05

Rushman1

Junior Member

6. May 2006 @ 03:21

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Thanks Saugmon...The backups I am doing are from wedding movies, softball games..ect..My wife works at a Florist and got me hooked up with a man who films them as well as other events. Since this is not a full time job for us, he does the filming and I do all the copies for the customers. I use Verbatim inkjet printable DVD+R 16X. My setup is 3 Dell computers all with Sony's to read and plextors to burn. The plextor is very slow when it comes to reading. My partner was lucky and got to go to Hawaii at the first of the year to film a wedding (he had to pay his own way, but wanted to go bad enough to do it)He uses a Sony HD camera with the big square lens. Any way when everyone go back in town I made them 15 copies and printed a Hawaii scene with the bride and groom on the disc. A couple months later they come back and said they want 100 copies and emailed me a data base of addresses for me to mail them out for them. I took the job. I got the backup copy out and fired up the puters. The backup made perfect copies from 2 computers but failed on my newest computer. (Dell 400 xps 3.2 HT.) Since I label all master copies and know which burner they came from,I did some spot checks and determined that the bad ones were from one burner. Funny thing is the bad disc will play just fine in the dvd player. I bought a new Sony 820A yesterday and have a Plextor PX 716A on order.I know its not the media. I have done hundred's of events movies and have not had a bad one come back in over a year. All on verbatim at 16X.When I checked the bad ones and they play. I didn't let them play all the way through. Guess I could FF them and see if the freeze up at the end.
Thanks!!

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saugmon

AfterDawn Addict

6. May 2006 @ 04:29

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Sounds like something wrong with that plextor px 716a

Verbatim 16x media is some very good stuff.Some of these quality drives give issues if you burned those verbs too slow.

How fast do you burn those verbs using the Plextor drive?

Verbatim media was designed to perform better with a faster burn.My benqs agree to this because of all the crc errors on my 2.4x backups. If I can't re-rip a backup,it's of no use to me.

Crc errors: Majority of drives can play discs with crc errors and you might not even see any issues. Now when you re-rip one of them,you need every byte of data off that disc to place it on your harddrive. Any major error-CRC-and you'll error out. Dvd decrypter is more aggressive ripper.I've gotten it to get though some of those crc errors,but not all of them.

CRC- means there's a bad sector/s.Could be dirty disc/damaged disc/a backup disc with severe errors/and encryption related.

The laser is trying to get through it,but it keeps cycling. After so long,it'll error out with that crc error message.

On that Plextor drive:

Update to the latest firmware version,if you have an older version.This controls the writing strategy for your media.

If there's any compression,reduce the backup target. What programs are you using to rip from that HD camera,onto dvd +r?

It may be wearing out,before replacement-Try a lens cleaning disc in her.That disc is a last resort,before drive replacement. You may even try swapping it out from another of your dells to see if that dell verify that issue.

I know nothing of those HD cameras,but I have done a ton of VHS and 8mm to dvd +r.

BTW: Your sony Dru 820A is a rebadged benq 1640.Very nice drives,and probably rank,quality wise,a hair below the Plextors.

Do you booktype your backups to dvd-rom using the plus format verbs?

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HP a1118x-b/athlon 64-3300+/BenQ 1650 BCDC/LG 8163B/Modded Wii/Epson-R300 and Ty Watershields!!!

This message has been edited since posting. Last time this message was edited on 6. May 2006 @ 04:37

Rushman1

Junior Member

6. May 2006 @ 05:19

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I use DVD Cloner Elby and burn max.I have a magnavox cleaner, but it does not always work. My computers are in the basement and always below 70 degrees. Little to no dust. I homebrew beer and keg it so I use CO2 gas. from time to time I blow out the burners with gas. Much cheaper than the cans you can buy at Rat Shack. I have 1.09 version which is the newest. Going to put in the new Sony today and maybe the Plextor will be here by Tuesday. Three of my computers have never been connected to the internet. They are the ones I burn with.
Got a new batch ready today for kegging!!! Will be ready to drink tonight!

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