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| | |-+  Famicom disk system has err code 27 for kaettekita mario bros
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Author Topic: Famicom disk system has err code 27 for kaettekita mario bros  (Read 1008 times)
alrob1995
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« on: September 11, 2018, 06:26:21 AM »

Every time I attempt to play Kaettekita Mario bros it gives me a disk error 27, I originally thought it was because of a faulty disk system however my disk system works perfectly with all my five other games. So Iíd assume itís a problem with the game itís self. if thatís the case then how do fix this? The game already looks perfectly clean
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togemet2
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« Reply #1 on: September 11, 2018, 10:07:33 AM »

Every time I attempt to play Kaettekita Mario bros it gives me a disk error 27, I originally thought it was because of a faulty disk system however my disk system works perfectly with all my five other games. So Iíd assume itís a problem with the game itís self. if thatís the case then how do fix this? The game already looks perfectly clean

Error 27 means indicates a problem with motor calibration. Thus, the drive cannot read the disk header file. It may, however, just be a problem with the disk. It really depends and it is hard to find the exact cause because of how some error messages aren't even documented. If you've tried other games and they worked perfectly, I would say the disk is at fault but you never know. I'm not really sure if five games are really enough. I've heard in the past it depends on what games you have tested as well.
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nensondubois
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« Reply #2 on: September 12, 2018, 02:41:32 AM »

It is an IRQ error that is a result of the cutscene banner being drawn and it interferes with the disk reading. It also affects the NES Classic official Canoe emulator as well as disks.
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boye
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« Reply #3 on: January 20, 2019, 12:36:13 PM »

Try cleaning the disk with a Q-Tip while spinning the center spindle slowly with your fingers.
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stuff_stuff
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« Reply #4 on: March 25, 2019, 03:21:44 PM »

As I understand, disk writers can be off causing disks written at a disk writer kiosk to be problematic. Various reasons have been given such as disk writer speed or head alignment. This assumes that the disk you received was written at a disk writer kiosk...I cannot remember if this title was ever offered at a disk writer kiosk though.

In my experience, if other disks read and one does not it is likely a head adjustment issue. I'm not advocating for you to adjust the head of your unit, unless you are 100% confident with the process...I've been down a few rabbit holes with head adjustment in the past. It can be a thing of nightmares!! But in my experience this resolves the issue 99% of the time.

Or a disk re-re-write could be in order to get the disk written properly. Both this, and fine tuning head adjustment generally has resolved Error 27's for me in the past. I would not recommend you clean the physical disk itself.

There is a chance it is a bad disk, but over the years I've run into maybe 8 or 9 totally unrecoverable disks.
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80sFREAK
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« Reply #5 on: March 28, 2019, 06:43:28 AM »

Quote
In my experience, if other disks read and one does not it is likely a head adjustment issue.
Strange logic  Huh
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I don't buy, sell or trade at moment.
P
FamicomBox
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« Reply #6 on: March 28, 2019, 08:46:02 AM »

As I understand, disk writers can be off causing disks written at a disk writer kiosk to be problematic. Various reasons have been given such as disk writer speed or head alignment. This assumes that the disk you received was written at a disk writer kiosk...I cannot remember if this title was ever offered at a disk writer kiosk though.
Isn't it more likely that the disk has been written at home by someone? If the kiosks were bad people would have complained and it would had to be fixed by Nintendo.
If a disk is written by a kiosk, the write date is on the disk so that's easy to tell, but AFAIK there is no way to tell if a disk has been rewritten at home.
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stuff_stuff
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« Reply #7 on: April 02, 2019, 07:58:33 PM »

Isn't it more likely that the disk has been written at home by someone? If the kiosks were bad people would have complained and it would had to be fixed by Nintendo.
It is likely, there were a lot of bootleggers back in the day. From what I understand the disk writers needed to be adjusted from time to time, too, due to heavy use.

I do have a stack of Chinese bootlegs that were a pain to get working likely due to bad/poor alignment on the writer. And some disks I bought from Japan that ended up being written by the seller that were initially funky to get loaded (seller did not disclose that he wrote the disks). I guess you'll never really know the history of a disk with the ability to re-write at home, etc.

I'm just saying there there are cases where if alignment is off, even by a little bit, it can cause read issues for some disks even if they are working in other FDS.
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« Reply #8 on: April 03, 2019, 09:44:32 AM »

Yeah that's why I think rewriting disks should be avoided as much as possible.

The header also contains manufacture date, how many times the disk has been rewritten in a disk writer and the disk writer's serial number, and also some unknown stuff, but if you write a disk at home you can write whatever you want anywhere as the full disk is completely writable.
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