[mkgordon]

Hi.

After many, many flawless burns with Toast 7, I've recently started having a string of Verification Failures. This is happening both with some Philips DVD-R media I just got and some Memorex and TDK media DVD-R I've been using without any problems for months. I have had, for some reason, no failures burning to TDK DVD-RW and -RW media.

I've been tracking the failures and it always seems to happen late in the verification, around narrow range of sectors. (2011232 is typical)

First question - if the disk appears to burn okay, but then fails verification, does this mean that there is going to be something wrong in the disk? I usually find this happens when I burn video disks. Does this mean I'll get a broken video or what?

Second, what, aside from flaky media, can be the cause of this? I wondered if perhaps my recent install of OSX 10.4.8 could have disrupted things. So I did an achive and install of 10.4 and then updated directly to 10.4.8. Made no difference.

Would reinstalling make a difference? Trash preferences?

Could there be something wrong with the drive mechanism? Am I supposed to be cleaning the drive in some way?

I'm on Toast 7.1 Titanium, on an iMac G5 20" with 10.4.8.

I have a Pioneer DVR-K05 Dual layer DVD burner.

I look forward to any tips or help.


Mike Gordon


EDIT - FOUND A WORK-AROUND

I tried burning the Philips DVDs at 2x and they worked. I upped the speed to 4x and they still worked. I haven't gone higher as I think I'd just be pushing my luck and 4x is fast enough for me.

This post has been edited by mkgordon: 12 November 2006 - 06:45 AM

[baker]

Hello Mike,

I've also been blighted by failures later-on in the burning (though perhaps not in verification) and I'm also running 10.4.8 but with Toast 6 and now 7 which has made not the slightest difference - after forking out the ££s.

I'm burning TDK which I used to record at the Best setting but then tried 1x which took forever but sometimes worked. Now, I'm back to square one and they all fail but you could slow the recording speed down.

I wondered if it was the OS upgrade or the TDK drive which are notorious for errors.

Good luck.

Richard.

[ordrup]

Verification failures are usually a result of either not enough RAM, or a faulty DVD blank.

The makes mentioned in this thread are not generally considered very good. Verbatim DVD-R and Fuji DVD-R usually give good results, particularly if you burn at low speed, say 2x - the slower the burn the better the quality.

Unless you collect coasters!

[lakewoodlawnman]

ordrup, on Nov 2 2006, 08:29 PM, said:

Verification failures are usually a result of either not enough RAM, or a faulty DVD blank.

The makes mentioned in this thread are not generally considered very good. Verbatim DVD-R and Fuji DVD-R usually give good results, particularly if you burn at low speed, say 2x - the slower the burn the better the quality.

Unless you collect coasters!

I don't agree with slower the better. Depends on the media and the burner.

[macmidiguy]

Preet at Roxio, on Oct 31 2006, 07:09 AM, said:

Verification error does not mean that the disc is bad. There can be a number reasons that you are getting verification errors. Refer to the following link for information.
http://kb.roxio.com/...b/Toast/000019T

Your posting is very timely to my question I posted today.

In the link information you provided it sezs: " To use the Compare option, Select Utilities -->Compare "



Could you please clarify/confirm for me that the " Original " is the " VIDEO_TS " folder that is on my harddrive being used for the burn source folder and the " Copy " is the " VIDEO_TS " on the burned DVD.

[narkspud]

Ever since Apple's latest software update, not only am I getting verification failures every time on my dual G5 2 GHz (that's with Taiyo Yuden media on multiple burners, internal and external), but Toast's "compare" feature is reporting a mismatch on every significant-sized pair of files or folders I try to run a comparison on!

I copy a file from disc to desktop, "compare" reports a mismatch. Hard drive to hard drive? Mismatch. External drive to external drive? Ditto. Files from two years ago? Mismatch. And the kicker . . . identical DVD-ROMs? Mismatch.

Plenty of RAM, and it's working fine (tested it all night last night). Since I've ruled out RAM, drives, burners and media, and the computer and discs seem to be functioning just swell otherwise, I'm forced to conclude that there's a software issue involving Toast and its verification/compare functions.

Am anxious and hopeful to hear informed pontifications on this topic.

UPDATE!!
Toast Exonerated! Real Killer Found! Narkspud's RAM Testing Program Accused of Purgery!

I had forgotten this, but my G5 came with a little disc called "Apple Hardware Test." I followed the directions and it fingered the culprit . . . I had some RAM headed south. It has been extracted, and now everything is running smoothly.

See resolution #5 at the link above. ;-)

On the downside, I now have proof that my data WAS becoming corrupted, so I suspect things will still be a bit buggy for the next few days at least.

This post has been edited by narkspud: 11 November 2006 - 11:40 PM