info needed on 5 1/4" dumping

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tomse
Posts: 16
Joined: Thu May 23, 2013 10:57 am

info needed on 5 1/4" dumping

Post by tomse » Sat Jul 27, 2013 4:46 pm

I have problems dumping HD DOS diskettes.
it's a teac fd-55gfr 5 1/4" drive, using 2.20 software on windows, and the slow firmware (fast firmware also tested but not used that much)
I've tried a number of other 5 1/4" drives -same issue-, I don't have the model numbers for these.

The output is "Unknown format" or "unformatted" (atm I don't remember what it was, but it was not "OK")

parameters used are
dtc -fmyfile.img -v360 -i4

I've also tried dumping DD disks
dtc -fmyfile.img -v300 -k2 -i4 (the output here said it was running 360rpm, is this normal behavior?)

I was lucky dumping a HD diskette as DD disk, but most files didn't work ofc.

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mr.vince
Posts: 2116
Joined: Tue Oct 05, 2010 5:48 pm

Re: info needed on 5 1/4" dumping

Post by mr.vince » Sat Jul 27, 2013 6:11 pm

If its unformatted, data might be bad or drive misaligned (very common for off-eBay purchases).

If you use the GUI, can you dump raw, too, and make a screenshot?

tomse
Posts: 16
Joined: Thu May 23, 2013 10:57 am

Re: info needed on 5 1/4" dumping

Post by tomse » Mon Jul 29, 2013 4:23 pm

Untitled.jpg
dumping as mfm to get result type
Untitled.jpg (83.35 KiB) Viewed 2102 times
Untitled2.jpg
Untitled2.jpg (83.04 KiB) Viewed 2102 times
This is what happens on all my 5 1/4" original disks (which are factory write protected)

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mr.vince
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Re: info needed on 5 1/4" dumping

Post by mr.vince » Tue Jul 30, 2013 6:41 am

We need the scatter view. Sorry, did not mention this, seemed too obvious to me.

tomse
Posts: 16
Joined: Thu May 23, 2013 10:57 am

Re: info needed on 5 1/4" dumping

Post by tomse » Sat Aug 03, 2013 10:11 am

Hope this helps.
The result is the same for all my 5 1/4" disks (DOS)
Untitled1.jpg
Untitled1.jpg (85.89 KiB) Viewed 2054 times
Untitled2.jpg
Untitled2.jpg (85.9 KiB) Viewed 2054 times

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IFW
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Re: info needed on 5 1/4" dumping

Post by IFW » Sat Aug 03, 2013 7:09 pm

Looks like you only selected stream files as an output?

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IFW
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Re: info needed on 5 1/4" dumping

Post by IFW » Sat Aug 03, 2013 7:11 pm

Could you please upload the first few tracks of a disk that shows unformatted, but definitely contains data.
Thanks.

tomse
Posts: 16
Joined: Thu May 23, 2013 10:57 am

Re: info needed on 5 1/4" dumping

Post by tomse » Mon Aug 05, 2013 8:39 am

@IFW Post#1 that was just for the screenshots, I originally chose MFM

@IFW Post#2 how do you want them, as stream or img files or both ?

cheers

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mr.vince
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Re: info needed on 5 1/4" dumping

Post by mr.vince » Mon Aug 05, 2013 2:54 pm

Stream please.

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IFW
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Joined: Mon Nov 08, 2010 2:42 pm

Re: info needed on 5 1/4" dumping

Post by IFW » Mon Aug 05, 2013 3:49 pm

Just stream files; everything can be generated by DTC from stream files just like as if it was reading a real disk.

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