Liteon Kprobe 1.1.4 interesting results

vbimport

#1

Using my Ltr-52246s f/w 6S0D scanning at 52x I’ve scanned regular red book audio cds and this program works great.

But ive found some interesting things with overburned cds, specifically ones burned on 99 minute media.

Test #1:
Burned on yesbuy.net 99 minute cdr at 4x.
Length: 99:09:?? (don’t know frames because displayed in winamp)
Scan size: entire disc
Kprobe scans to 19:05:13 with C1: Max:48 Total: 11815 Avg:14.975 C2: Max:26 Total:190 Avg: .241
(for efficiency purposes i will now refer to error rates with the notation C1(Max,Total,Avg))

Scan size: LBA: start, 0 end, 6CF75
(used formula LBA = (m6075)+(s*75)+f+150 then converted from base10 to base 16 (base10= 446325)
Kprobe scans to 19:36:38 with C1(98,14031,17.322) and C2(29,347,.428)

When i burned this disc with nero the leadout was completly written so i know that’s not the reason for not giving a full scan.

Test #2:
Burned on yesbuy.net 99 minute cdr at 4x.
Length: 102:30:13 (yes i did overburn a 99min cd:) ) (know exact frames because i had already determined that to be the maximum overburn size for these discs and had the preferences in nero set to that)
Scan size: entire disc
Kprobe gives error “end address is too close to start address”
Interestingly, kprobe shows 477218:37:22 as the time and 8028E7AB for the end LBA address.

Scan size: LBA(0,70A65) (using notation LBA(start,end))
scans to 90:01:04 with C1(267,365311,104.345) C2(36,99,.028)
Hmm, scanned all the way to 90 minutes, wonder why. Im beginning to think it doesn’t care if the leadout is present or not because this disc didn’t get one finished. Perhaps the lower C2 rate made the difference?

Test #3:
Burned on yesbuy.net 99 minute cdr at 4x.
Length: 96:57:??
Scan size: entire disc
Scans to 84:58:36 with C1(325,399199,129.107) C2(114,4046,1.309)

Scan size: LBA(0,6A8C9)
scans to 85:00:03 with C1(325,378382,123.051) C2(100,2718,.884)
Leadout written completly

Test #4
ATIP: 97m 26s 66f
Disc Manufacturer: CMC Magnetics Corp.
Reflective layer: Dye (Short strategy; e.g. Phthalocyanine)
Media type: CD-Recordable
Recording Speeds: min. unknown - max. unknown
nominal Capacity: 702.83MB (79m 59s 74f / LBA: 359849)
Burned at 4x
Length: 82:23:07
Scan size: entire disc
Scans to 71:38:05 C1(325,443780,165.590) C2(41,369,.138)

Scan size: LBA(0,5A8C2) (something to note: after entering aformentioned LBA address it changed it to 5A82B after clicking start)
scans to 71:53:65 with C1(339,431291,160.630) C2(39,124,.046)
Not sure on status of leadout

Test #5
ATIP: 97m 24s 01f
Disc Manufacturer: Taiyo Yuden Company Ltd.
Reflective layer: Dye (Long strategy; e.g. Cyanine, Azo etc.)
Media type: CD-Recordable
Recording Speeds: min. unknown - max. unknown
nominal Capacity: 702.83MB (79m 59s 72f / LBA: 359847)
Burned at 4x
Length: 81:08:64
Scan Size: entire disc
scanned completly with C1(23,7391,2.419) C2(31,32,.010)
Leadout written completly

Test #6 Control
ATIP: 97m 24s 01f
Disc Manufacturer: Taiyo Yuden Company Ltd.
Reflective layer: Dye (Long strategy; e.g. Cyanine, Azo etc.)
Media type: CD-Recordable
Recording Speeds: min. unknown - max. unknown
nominal Capacity: 702.83MB (79m 59s 73f / LBA: 359848)
Burned at 40x rated at 24x
Length: 37:14:32
Scan size: entire disc
scanned completly with C1(6,533,.331) C2(0,0,0)
Leadout written completly

Test #7 Control
ATIP: 97m 24s 01f
Disc Manufacturer: Taiyo Yuden Company Ltd.
Reflective layer: Dye (Long strategy; e.g. Cyanine, Azo etc.)
Media type: CD-Recordable
Recording Speeds: min. unknown - max. unknown
nominal Capacity: 702.83MB (79m 59s 73f / LBA: 359848)
Burned at 40x rated at 24x
Length: 79:31:59
Scan size: entire disc
scanned completly with C1(34,15922,5.133) C2(0,0,0)
Leadout written completly

Test #8 Intentional scratch
One freshly burned cd at 32x
ATIP: 97m 15s 17f
Disc Manufacturer: Ritek Co.
Reflective layer: Dye (Short strategy; e.g. Phthalocyanine)
Media type: CD-Recordable
Recording Speeds: min. unknown - max. unknown
nominal Capacity: 702.83MB (79m 59s 74f / LBA: 359849)
Reccomended burn speed 32x

Scan #1 - No scratches
Length: 51:29:67
Scan size: entire disc
scanned completly with C1(227,171282,82.189) C2(0,0,0)

Scan #2 - Minor scratches toward end of disc
scanned completly with C1(214,185389,91.460) C2(97,2985,1.473)
cdspeed quality check showed 453600 errors with no red errors, all yellow. So still readable.

Scan #3 - Medium sized scratches in middle (when describing size, i mean depth)
scanned completly with C1(152,116123,58.767) C2(254,38389,19.428)
cd quality check showed 2421387 errors with several seconds unreadable.

Scan #4 - Very heavy scratches at beginning of disc
unable to start scan with entire disc option received error “end address is too close to start address”
Scan size: LBA(0,389D4) same error received.
Now no medium present is shown. Isobuster can’t tell there’s a cd in there either. Neither can homestereo or set-top dvd player.

Conclusion:
High c2 error rates affect scan and how far it will scan. This version also seems to have lots of trouble scanning 99min discs, whether or not this is due to c2 error count or not im not sure. It would seem that kprobe doesn’t like 99minute cd media at all, due to the lower quality of it and not even scanning all the way.

Sorry i can’t post the pics, no webspace, if someone would like to upload them on their webpage id be more than happy to email them to you.


#2

Kprobe will stop the scan if it cannot read a sector. Unlike CDDoctor, which will re-scan over and over untill it gets the sector read (or you die of old age), and unlike CDSpeed which allows the drive to slow to read the sector, it just stops. If you scan at a lower speed you will get a full scan. CDDr will also sometimes just skip over the problem sectors.
So, Kprobe may be unable to read what would be a corrected C2 error in the other tests. It will tolerate a certain degree of C2, but no more. My interpretation is that this removes the variables of re-reading and slowing to maintain the fewest variables in the test. You just lower the test speed to get a full scan.
Another interpretation would be that the disc has just failed the test, and you need to get some better media. :wink:


#3

Another interpretation would be that the disc has just failed the test, and you need to get some better media.

Thats what i was leaning towards. I know it was crap media, but i just wanted some 99min. media for testing purposes, like today.:bigsmile:


#4

I don’t even know who to blame. Scanned my trusty TDK 48x and the new Fuji(TY) 48x. TDK = it’s all good. Fuji = went crazy after 71%. I’ve always heard how good TYs are, but KProbe ain’t backing that claim.


#5

Just did a scan of a Sony CDQ80NX3 1x-32x/Taiyo Yuden recorded @ 48x and I got a maximum C1 rate of 10 and an average of 0.320. I’ll send you the scans if you want me to.

TerminalVeloCD


#6

Fuji = went crazy after 71%

Wasn’t by chance the colored Fuji was it?


#7

Nope, just the ones I bought from OfficeMax. 100/Spindle. Gonna lower the scan speed and try it again later tonight.


#8

I see as much batch variation with TY as I do with any other brand. The latest batch I bought is performing very well, ( also Office Max special) error rates are under 10 max C1 when burned at 40x. This is with 52x LiteOn 6S0D.