Re: Re: unable to read some of a DVD contents
Yes. as Thomas and Volker pointed that the media is the one to be blamed. I used better quality DVD, the most expensive one in the store :), and I've 5 successful burns and all passed the integrity check. Thanks for all your helps, Kadir --- This email contains confidential information. If you have received this email in error, please delete it immediately, and inform us of the mistake by return email. Any form of reproduction, or further dissemination of this email is strictly prohibited. Also, note that the opinions expressed in this email are those of the author and are not necessarily those of the Fonterra Co-operative Group Limited. http://www.fonterra.com/ ---
Re: Re: unable to read some of a DVD contents
Hi, > what is the indicator that the burn process was only 95% completed? The only reliable indicator seems to be checkreading by all drives which shall be able to read the DVD. This would mean either - to compare each file on the DVD with its original on hard disk (if the files on disk did not change meanwhile) - or to compare the data image on DVD with the data image on disk (if the image was stored on disk) - or to compare the data image on DVD with a checksum which was made when that image was written to DVD. (I prefer this method.) I just had to trash a previously used DVD-RW which failed to pass the checksum test with errors at the very start of the image. After a test re-write it failed to deliver the last 2 MB (but the start of the test image was ok). A third re-write yielded missing 300 MB at the end of the media. The fourth try failed with :-[ PERFORM OPC failed with SK=3h/ASC=73h/ACQ=03h]: Input/output error According to keys.txt : 3 73 03 POWER CALIBRATION AREA ERROR (Not much idea what that means but it looks ugly and fatal) I successfully tested another DVD-RW from the same spindle as the ill one. So the burner is not to blame. It is not about the manufacturer of the media, not even about the particular lot. It is not about the number of re-uses. The sucessfull DVD-RW is in heavy test use, has a nice collection of scratches ... and it works fine. The ill one had its third or fourth re-use, looks shiny and smooth ... A theory which emphasizes the influence of moon phases or geomantic radiation would probably be as successful as the usual methods of DVD compatibilty prediction. Have a nice day :) Thomas -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Re: unable to read some of a DVD contents
> I used verbose option and clearly see that the burn process was completed and > the session was closed. > what is the indicator that the burn process was only 95% completed? The burn was 100% completed at 95% quality. ;) That's putting it colloquially of course. The burner is maladjusted to the media, when all remaining tolerance for successful reading is exceeded, you get a read error. What this really indicates however that the whole process is very marginal with no space for future errors left. Dump those disks, or at least don't expect them to still hold your precious data in a few months. And even if they still work in a few months, don't trust it. Volker -- Volker Kuhlmann is possibly list0570 with the domain in header http://volker.dnsalias.net/ Please do not CC list postings to me. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Re: unable to read some of a DVD contents
>>I've successfully burnt data (4 GB, around 1 files) to a DVD. >>I saw that all the files have been burnt to DVD with exact size.>>However, I couldn't read some of the files (corrupted ?) and this happened randomly (i.e. I burnt another ten DVDs with the same contents and the corruptions >>happened on different files).>A clear indication that you did *not* burn succesfully (only 95%>succesfully - as you see that's not good enough), or that the reader is>unable to read the burnt disk. Media incompatability in both cases, the>drive(s) can't adjust to the inserted media correctly. Try a different>media brand.>Volker I used verbose option and clearly see that the burn process was completed and the session was closed. what is the indicator that the burn process was only 95% completed? I'll definitely try your suggestion with a different media brand. thanks, Kadir
