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Crypto1971Offline
22 Post subject: USB Floppy Disk Drive: Force reading regardless of format  PostPosted: 03.12.2013, 20:03



Joined: 2011-09-18
Posts: 12

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Hi,

I need to access some very special diskettes that do not seem to have a standard FAT format.

To access them I have a NEC USB Floppy disk drive. When I enter the disk into drive, I keep getting

- disk is write protected,
- error because bad/wrong etc. superblock.

The drive is recognized by the system (lsusb), and konsole tells me some info about the drive:
    root@pucki:~# ufiformat -i /dev/sdc
    vendor: NEC
    product: USB UF000x
    write protect: on
    media type: 2DD
    status block size kb
    unformatted 1440 512 720


Strange thing is it says "unformatted" because the disk definitely contains data. The problem is, that the disk format is none of the known formats (it is a customized disk FAT format originating from an electric organ). The disk is not damaged and can be read by the organ.

What can I do to get at least a rough idea of what is on the disk?

Thanks for any help and kind regards,
Crypto.
 
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DonKultOffline
Post subject: RE: USB Floppy Disk Drive: Force reading regardless of forma  PostPosted: 04.12.2013, 09:53
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Joined: 2010-09-02
Posts: 481

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You can read directly from the device file, but that boils down to reading binary/hex directly.
If you want any kind of support from your system while reading it, you have to get the system to recognize it.

But, are you sure the floppy disk still contains (all) data? Those things tended to be relatively fragile, I wouldn't be too much surprised if some bits were "hurt" and cause it to not be recognizable. Maybe ddrescue can help you.

_________________
MfG. DonKult
"I never make stupid mistakes. Only very, very clever ones." ~ The Doctor
 
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