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cwilbar

SuperCard Pro check media failures

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I had not been aware that there was a utility to check media.  I've had a difficult time getting a working Encounter copy created from images I made of my genuine Encounter disk.  The atx from reading it runs in Altirra.  However I've yet to get a written out disk to work on real hardware (I've written the .scp, I've written the .atx with -p91, etc... to no avail so far.

 

However, that isn't what the post is about.  I have checked several disks now using the media check capability.  Not a single disk passes with clicking retry.  Not one.  Even with freshly cleaned heads and new old stock (3M) diskettes.

 

I do plan on trying another drive just to be sure it isn't something to do with the drive....  but I'm wondering what experience others have had with the media check feature.  I'm running the latest software.

 

My SCP is using a standard PC twist floppy cable with only one drive currently attached.  There is a terminator present on the 5.25" drive.

 

How does the SCP handle testing 5.25" media (I do have to turn the slider down from 80 tracks to 40 tracks as my drive is a 48tpi drive) ?  Could it be testing with improper write currents (i.e. for the higher coercivity media of HD 5.25" disks) ?

 

 

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As a follow up here... on the Encounter issue, I did finally write a successful copy using a8rawconv and write the .scp image to a different floppy.  Seems that the first floppy (new 3M out of the box) was the issue.

 

I still am unable to get a successful media check on any blank 5.25" floppy I've tried (which has only been about a half dozen so far).  I have successfully written (and boot tested) 30 of my originals so far with the drive (unlike the prior Toshiba drive I was using that turned out to not be reading well and ~29 out of 30 disks written with that one wouldn't boot).  This current drive has faired much better (and is only one of 3 drives I have that can write a flippy w/o an index hole detected).

 

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when you say 'blank' do you mean not formatted at all? if so, that makes perfect sense... there's nothing there to check...

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2 hours ago, cwilbar said:

I have successfully written (and boot tested) 30 of my originals so far with the drive (unlike the prior Toshiba drive I was using that turned out to not be reading well and ~29 out of 30 disks written with that one wouldn't boot).  This current drive has faired much better (and is only one of 3 drives I have that can write a flippy w/o an index hole detected).

 

What is "the drive", which is so good?

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11 hours ago, _The Doctor__ said:

when you say 'blank' do you mean not formatted at all? if so, that makes perfect sense... there's nothing there to check...

AFAIK the test is a media test to qualify the media.  It writes then reads some flux pattern(s).  I get the same results on any disk, formatted or bulk erased.

 

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10 hours ago, TheMontezuma said:

What is "the drive", which is so good?

48TPI drives I have that will do a flippy w/o a second index hole:

 

Toshiba FDD 5445A0N 01 REV A

Toshiba FDD 6471L0K 01 REV A (this one gave me mixed reliability reads and non reliable writes (almost every written disk fails; I think the drive is out of alignment or something)

TEAC FD-54B-02-U

 

I have a Panasonic model I have to test still.

 

I have not tested any of my 1.2M 5.25" drives for flippy compatability.

 

I believe that at least some TEAC models with an EX jumper when used (vs I think JX ?) will do this as well, if I'm remembering what I've read correctly.

 

I'm currently using the TEAC FD-54B-02-U for imaging my original Atari disks and writing out the backups.

 

 

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For Atari disks I find the 1.2m drives are not as good at reading problematic Atari media... I suspect you'll find the same

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With the head at half the width, I'd imagine for problematic disks it would not be as good... especially depending on how the disk was scratched/worn/etc in that narrower region vs having the full width head where you might get more of the good signal.

 

Does anyone have any experience with the SuperCard Pros media check function ?  Do others have this same issue with the media check ?

 

-- Curt

 

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I tried some various drives I had (not all).

 

TEAC FD54-B will randomly throw errors

Shugart SA455-3AA will throw the occasional random error

Panasonic JU-455-5AAB works flawlessly

Alps DFC222B05A works flawlessly

Toshiba FDD5445A0N works flawlessly

 

When track errors are detected, looking at the track with the explorer will find one spot in the track with random dots in a vertical column.

 

I did find someone else on cbmstuff.com's forums who was experiencing the same thing.

 

All drives were tested using the same exact floppy disk, in the same enclosure with the same power supply.  Only variable was the drive.

 

I was writing disks fine with the FD54-B, but I can't use it to test media.

 

For now I've switched to the Panasoinc as I can test media and read/write disks, including flippies (no need for an index hole).

 

 

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Updated drive list for index free flippy support on Supercard Pro

 

Toshiba FDD 5445A0N 01 REV A

Toshiba FDD 6471L0K 01 REV A

TEAC FD-54B-02-U

Shugart SA455-3AA

Panasonic JU-455-5AAB (runs media test fine as well)

 

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