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Author Topic: Pfi Failed Crc Check - Does It Matter?  (Read 27 times)

ruley

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Pfi Failed Crc Check - Does It Matter?
« on: January 13, 2009, 03:14:00 AM »

QUOTE(DrTwox @ Jan 13 2009, 05:23 PM) View Post

Hi all.

I've been backing up my game collection using Schtrom4.0 (XBC doesn't work for me), and I've found that newer games (Prince of Persia in particular) fail the PFI checks in AGBX, Mulleter and XBC. As I'm ripping from original discs, is this an issue? Are these checks for people who pirate games or should I be concerned that maybe the games are not ripping correctly?

Yes it should be fine, it just means the data you got off your disk is different from someone else.
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sosotiit

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Pfi Failed Crc Check - Does It Matter?
« Reply #1 on: January 13, 2009, 06:47:00 AM »

Tutorial: Backup/burn/stealth Verify With Xbc & Imgburn , and some specific rules of this forum / ABGX & Mulleter Use


forget about discussion on the online DB part of mulleter /ABGX at XS


stick to XBC and Schtrom for stealth check if you did your backups

soso
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sosotiit

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Pfi Failed Crc Check - Does It Matter?
« Reply #2 on: January 13, 2009, 07:20:00 AM »

QUOTE(DrTwox @ Jan 13 2009, 01:53 AM) View Post

... fail the PFI checks in ...and XBC.



if you are getting a PFI fail in XBC (or the non online part of other tool) then there is a problem with your backup.
try in schtrom the Stealth check

soso
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sosotiit

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Pfi Failed Crc Check - Does It Matter?
« Reply #3 on: January 14, 2009, 07:16:00 AM »

Up to you, but I would personnaly no settle for this. You are getting errors in XBC and in the stealth check of mulleter (not the CRC part), so it seems there is something wrong.
It seems as if it is a PFI that does not match the game xex.
BTW, I did the latest prince and all is OK.

-Try to do it without splitvid in Schtrom (whole disc stealth xtreme 3.0)

-can you try another game?

-maybe you cannot do complete game with XBC by can you extract ss, DMI, pfi and video in the Drive tool section of xbc? (not sure if you need to unlock or not before, havent done that in a while)

soso

edit: last Q what is the error you are getting with XBC? Start button remains grey, if not waht happens when you press that start button (an error during extraction) ?
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sosotiit

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Pfi Failed Crc Check - Does It Matter?
« Reply #4 on: January 14, 2009, 05:15:00 PM »

QUOTE(sosotiit @ Jan 14 2009, 08:52 AM) View Post

-Try to do it without splitvid in Schtrom (whole disc stealth xtreme 3.0)
-maybe you cannot do complete game with XBC by can you extract ss, DMI, pfi and video in the Drive tool section of xbc? (not sure if you need to unlock or not before, havent done that in a while)

try these two and keep all files.

If you can extract SS/stealth with XBC, then we can try inject them in the game image using image tool of XBC.

soso
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sosotiit

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Pfi Failed Crc Check - Does It Matter?
« Reply #5 on: January 14, 2009, 05:24:00 PM »

QUOTE(DrTwox @ Jan 14 2009, 06:54 PM) View Post

SS and DMI extract/save from the disc, PFI does not. Clicking the "PFI Sector" button does nothing but show an error on the status bar "Operation Failed".
The "Unlock Drive" button tells me the drive is already unlocked
"Get Region" and "XDVDFS Dump" print "Unlocking game partition failed" in the output/log window.
"Save Layout" doesn't appear to do anything.

However, I have used Schtrom4.0 to extract the PFI (from the disk), and used XBC to inject it back into the .iso. The .iso now passes all tests in Schtrom, XBC and Mulleter.  Which raises more questions! How can it pass the checks both times in Schtrom4.0 when clearly the .iso has changed.  How does XBC know what the values it checks are supposed to be?

Thanks for you help sosotiit, very much appreciated.



it seems each of these prog checks the structure a bit differently and with slightly diff criterias, it seems that specific error was not seem by schtrom.
That is why I usually run it thru both XBC and schtrom.

What is most frustrating is to see the number of people with SATA kreon drive having issue, For the games where you have problem you may have to reextract / reinject like you did today  sad.gif .

this is  uhh.gif , other possibility is that you kreon does not have the strongest set of laser/lens and generates error.  But with the error correction present on DVD sector/block that would be surprising.



soso
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sosotiit

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Pfi Failed Crc Check - Does It Matter?
« Reply #6 on: January 14, 2009, 05:55:00 PM »

well , the SS will always differ from a few bytes, this is normal.

believe it is up to 4 bytes that can differ in a very specific zone.

the way to check a crc of ss: put it in an image and run schtrom Stealth check and the SS crc should be the same (and the Raw SS will differ because of these few bytes). The SS crc in that case is calculated without these 4 bytes.



soso
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sosotiit

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Pfi Failed Crc Check - Does It Matter?
« Reply #7 on: January 14, 2009, 07:16:00 PM »

unsure, it depends if these these 4 or 5 bytes are in the overall results

so compare both of your extraction with schtrom stealth check , all components (except raw SS)

soso
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sosotiit

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Pfi Failed Crc Check - Does It Matter?
« Reply #8 on: January 14, 2009, 07:55:00 PM »

QUOTE(DrTwox @ Jan 14 2009, 08:04 PM) View Post

Should the final iso always be the same crc, reguardless of the app(s) used to extract/inject the different parts? I'd like to get this right the first time, before I start burning disks smile.gif


let me redo that last one , it was not very good

The crc except for these 4 bytes should be the same, so a global crc on the 7G file will not work.

You need to do schtrom stealth check on both extraction and compare all crc values (except Raw SS)

Also do not consider the "overall result", this is only a concatenation of the SS Crc and XEX Media ID. It is not a global CRC excluding the 4 bytes.

soso
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sosotiit

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Pfi Failed Crc Check - Does It Matter?
« Reply #9 on: January 15, 2009, 03:23:00 AM »

what is real strange is that whenyou do a complete rip with SChtrom, the PFI is not Good, but then when you extract it by itself it works (but not in XBC)

For the time being, I would stick with schtrom, then reextract pFI to reinsert it in the image,  and stealth check with XBC/Schtrom.

All this is still strange??

soso
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DrTwox

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Pfi Failed Crc Check - Does It Matter?
« Reply #10 on: January 15, 2009, 04:52:00 AM »

Yes, it is strange! Hopefully some future version of XBC will work better with these troublesome drives.

Thanks again for your assistance.
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