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Re: Perfectrip?

Posted: Sat Nov 03, 2007 6:41 am
by gigadeath
My LG CD-Rom drive is a few years old, with an AccurateRip offset of +6 (-24), and my dumps perfectly matched those of Themabus:

Would a drive with bigger offset "dump better"? Sounds strange to me.

Re: Perfectrip?

Posted: Sat Nov 03, 2007 8:40 am
by themabus
no, i'm not oposing what Vigi said. if he says Sony 100E or 120E are good, they must be Image just that i thought the same. i thought i won't be able to read much audio cds with +6 offset drive because only cd that were in db and that i had was -617 and i could not read it. and i got myself Asus CD-S500/A (+1858). very cheap from ebay. and with that i could dump that European demo disc with -617 offset. but after that all cds i read were +32 or even larger positive offset. and thing is with positive offset that last audio track gets bytes pushed out to lead out. and judging from gigadeath's, p_star's and batleth92 Sega dumps that's far more often than negative offset. so just don't worry, it's lucky you have a Plextor Image , don't throw it away just yet. but maybe since i guess you have European region cds, maybe they do have negative offset. to recommend anything - i don't have that experience. there was thread like this, where admins commented:
/viewtopic.php?t=556

i can only add to that brief summary about my drives:

Asus CD-S500/A (+1858 ;-30=1828)
+read negative offset audio
+very fast audio extract
-doesn't overread in leadout
-is rom not rw and can't read subchannel
-screws up data tracks so good for audio only

Plextor CD-R PREMIUM (+30 ;-30=0)
+overread lead-out
+somewhat fast audio extract
+read subchannel
-can't see far in pregap

Lite-On DVDRW LH-18A1H HL07 (+6; -30=-24)
+read subchannel
-can't see far in pregap at all
-can't see in lead-out
~most slow read but most precise

Re: Perfectrip?

Posted: Sat Nov 03, 2007 11:33 am
by p_star
By the way, all that who copies the Japanese disks for SS and MCD I urgently would recommend to check correctness of last audio  track as at offset equal 1000 + the probability of loss data in last sectors of last audiotrack is great.
For an example. From 20 disks for SS which I have copied, only at pair last audiotrack on a drive with offset +6 (EAC) was correctly copied.
I should use other drive with offest equal -1164 to extinguish huge positive offset the Japanese disks.
Forgive my English Image

Re: Perfectrip?

Posted: Sat Nov 03, 2007 2:05 pm
by gigadeath
p_star wrote:By the way, all that who copies the Japanese disks for SS and MCD I urgently would recommend to check correctness of last audio  track as at offset equal 1000 + the probability of loss data in last sectors of last audiotrack is great.
For an example. From 20 disks for SS which I have copied, only at pair last audiotrack on a drive with offset +6 (EAC) was correctly copied.
I should use other drive with offest equal -1164 to extinguish huge positive offset the Japanese disks.
Forgive my English Image
Forgive me, but I still haven't understood if a drive with +6/-24 offset can dump correctly or not. I got the same CRCs as Themabus with a drive like that.

Re: Perfectrip?

Posted: Sat Nov 03, 2007 3:28 pm
by themabus
mmmm now neither do i Image i can't see last few sectors on LH-18A1H, it's true since it does not overread but on PREMIUM ther's data until last half of sector in Gambler Jiko Chuushinha 2 (+1823). and we match crc on different drives, so it should be right, shouldn't it? p_star, could you please explain more on this? did you mean if drive does not overread?

Re: Perfectrip?

Posted: Sat Nov 03, 2007 3:41 pm
by gigadeath
How can I see if the drive does the overread or not? I have that option always checked in EAC (as you can see in the EAC logs I posted).

Re: Perfectrip?

Posted: Sun Nov 04, 2007 12:39 am
by themabus
in EAC, under Drive Options menu click 'Detect read sample offset correction'. and also when you read last autdio track with somewhat large positive offset, EAC will give error at the very end if drive does not overread in lead-out area.

Re: Perfectrip?

Posted: Sun Nov 04, 2007 4:23 am
by gigadeath
Never had errors on last track...

Re: Perfectrip?

Posted: Sun Nov 04, 2007 9:52 am
by p_star
themabus, gigadeath you lucky Image
themabus wrote:p_star, could you please explain more on this? did you mean if drive does not overread?
Yes, it I also wished to tell:)
Though I am not assured completely. At me never was a drive with overread.

Re: Perfectrip?

Posted: Mon Nov 05, 2007 9:56 am
by themabus
oh, ok! Image