Ouch:

In reply to:

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hda4 is mounted.
no room for private writable mapping
error: -12
/dev/hda4: Memory allocation failed while setting up superblock

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Basically, it ran out of memory (Mk1 has only 8MB) while trying to create the filesystem for the music partition. The drive is just plain too big for the diskbuilder.

I suppose one might be able to create the filesystem "by hand", with parameters that require less memory. But first, try the Mk2 diskbuilder on it in a mk2 machine (ugh!). Once that succeeds (it will), then install the Mk1 .developer image onto it.

If all that fails, we'll have to do it the "hard way".

Cheers (?)