Or replace the first mount command with "rwm" and the second mount command with "rom"
This will mount both Drive0 and Drive1 writable and readonly respectively..

Jazz
(List 112, S/N 00030, 4 gig blue)
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Jazz (List 112, Mk2 42 gig #40. Mk1 4 gig #30. Mk3 1.6 16v)