info needed on 5 1/4" dumping

[tomse]

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.

[mr.vince]

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]

dumping as mfm to get result type

Untitled.jpg (83.35 KiB) Viewed 2429 times

Untitled2.jpg (83.04 KiB) Viewed 2429 times

This is what happens on all my 5 1/4" original disks (which are factory write protected)

[mr.vince]

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

[tomse]

Hope this helps.
The result is the same for all my 5 1/4" disks (DOS)

Untitled1.jpg (85.89 KiB) Viewed 2381 times

Untitled2.jpg (85.9 KiB) Viewed 2381 times

[IFW]

Looks like you only selected stream files as an output?

[IFW]

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

[tomse]

@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

[mr.vince]

Stream please.

[IFW]

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