77-track "Japanese style" disks

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IFW
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Re: 77-track "Japanese style" disks

Post by IFW » Tue Feb 19, 2013 11:57 am

Calibration checks the individual track positions that work with your drive mechanics.
Most drives can access more tracks than the minimum standardized values although they might have issues with accessing data stored on the additional tracks.

clemfm
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Re: 77-track "Japanese style" disks

Post by clemfm » Tue Feb 19, 2013 11:01 pm

Can anyone supply model numbers of any 5.25 inch 77/1024/96 drives?

clemfm
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Re: 77-track "Japanese style" disks

Post by clemfm » Fri Aug 02, 2013 1:27 pm

Okay, I'm back onto trying to archive a few 5.25" 77 Track disks.......

How does this look:
dtc -test.raw -v360 -k1 -d0 -e77 -oe77 -t10 -i0

I see the previously proposed -ec options has appeared, as -oe. I'm not sure if the "end track" is 76 or 77 i.e. 0 to 76 = 77?

The image will be used with the HxC2000 FDD Emulator.

Clem

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IFW
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Re: 77-track "Japanese style" disks

Post by IFW » Fri Aug 02, 2013 2:24 pm

If you want to stop the imaging at track 76 add -e76 at the end.
Based on your command, assuming you want the stream files as well as an image file I'd use:

[double sided]
dtc -ftest.raw -i0 -ftest.img -v360 -oe76 -i4 -t10 -e76 -l8

[single sided, side 0]
dtc -ftest.raw -g0 -i0 -ftest.img -v360 -g0 -oe76 -i4 -t10 -e76 -l8

77 tracks are track numbered from 0 to 76. Parameters always use inclusive values; you want to stop on track 76.

clemfm
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Re: 77-track "Japanese style" disks

Post by clemfm » Sun Aug 04, 2013 11:16 am

Okay, as per the previous post, I used:

dtc -flbb1bu.raw -i0 -flbb1bu.img -v360 -oe76 -i4 -z2 -t10 -e76 -l8

And the resultant error log is attached.

I take it that this disk has gone to God? :(

Clem
Attachments
lbb1bu.txt.zip
(2.09 KiB) Downloaded 129 times

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IFW
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Re: 77-track "Japanese style" disks

Post by IFW » Sun Aug 04, 2013 1:48 pm

Does not look very good for track 0... you can try and clean it with IPA.

clemfm
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Re: 77-track "Japanese style" disks

Post by clemfm » Sun Aug 04, 2013 11:15 pm

IFW wrote:Does not look very good for track 0... you can try and clean it with IPA.
I was equally concerned about the further errors on several subsequent tracks?

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mr.vince
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Re: 77-track "Japanese style" disks

Post by mr.vince » Mon Aug 05, 2013 7:24 am

So start with IPA...

Jeff_HxC2001
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Re: 77-track

Post by Jeff_HxC2001 » Mon Aug 05, 2013 8:01 am

One small note : Many Japanese systems use the FM / Single density encoding on the first track.
Be sure that this is not the case here.

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