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Old 22 May 2015, 23:47   #1
mark_k
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Problem with diskspare disk image

I've been trying to get WinUAE to work with diskspare-type disk image files. Using diskspare.device with an extended ADF (2104892 bytes long, UAE-1ADF signature) seems to work fine. Or at least, the Format command seems to work OK.

However something seems to go wrong when using a plain disk image file. I created a file 1007616 bytes long (= 82*2*12*512), which WinUAE should detect as an 82-track DiskSpare format image from its size.

Inserting that in drive 0 then doing Format DRIVE DS0: NAME blah NOICONS FFS seems to work initially: the Formatting/Verifying text appears up to track 81. But at the end when it says Initializing disk... there is a delay before an error message Format Failure: not a valid DOS disk. And looking at the disk image file in a hex editor, its contents are unchanged (all zero bytes).
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Old 23 May 2015, 00:04   #2
Arnie
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Diskspare images made on a real Amiga can't be formatted in WinUAE. You have to create a custom blank (2mb) to format them.
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Old 23 May 2015, 09:28   #3
Toni Wilen
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Diskspare support is read-only.
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Old 23 May 2015, 09:29   #4
dlfrsilver
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indeed ! you need to create a custom disk under winuae, making yourself your own extended adf container file is a bad idea

EDIT : @Toni : why is it read-only Toni ? Is there any problem with diskspare ?
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Old 23 May 2015, 09:44   #5
Toni Wilen
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I think you misunderstood.

"Direct" support as in mounting adf of exact size of diskspare disk after decoding it is read-only. Nothing to do with extended adf. (which of course works read/write).

Some diskspare disks were archived this way -> can easily mount in emulation.
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Old 23 May 2015, 17:07   #6
dlfrsilver
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Thanks for this explanation
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