Re: GCR <--CP/M --> MS-DOS and vice versa?

["Charlie" <charlied@NOSPAMbboard.com>]

"Marsha" <menacechgo@aol.com> wrote in message
news:Xns9337CB862A69menacechgoaolcom@206.141.192.32...
> Eric Smith <eric-no-spam-for-me@brouhaha.com> wrote in
> qhisuwaunv.fsf@ruckus.brouhaha.com:">news:qhisuwaunv.fsf@ruckus.brouhaha.com:
>
> > To a rough approximation, MFM is to GCR as CP/M is to Apple DOS (or
> > ProDOS)
>
> since technically an Apple based disk editor could read sectors from
> Apple CP/M, Pascal, ProDOS, Dos3.3, and often DOS 3.2.1 disks.
>
> A better comparison is a DVD/CD compared to a 45 record
> both about the same size with cylinders or a spiral
> but neither is hardware compatible.

DVDs, CDs and 45 records all use a spiral not cylinders.

Charlie