Tony Duell wrote:
[RX02 format]
On the other hand, as long as the SSSD sector
headers were present, it
was probably possible to fix the data areas using that "FORMAT" command
when there were problems with the media. So maybe "FORMAT" was
justified to some extent.
I think it did re-write the headers, so it was a sort-of Format command.
The useful thing about it is that RX01 low-level format was actually the
same as the stanard 8" single-density format. So you coudl take a totally
blank 8" disk, format it single-density in a CP/M machine (or whateer),
put it in an RX02 nad reformat it as a M2FM disk. That's how I avoided
ever buying DEC media.
... which were extremely expensive, if I remember correctly.
Here in Canada and the US, I seem to remember $ 50 for a
box of 10 DEC RX02 media. I think that unformatted 8" media
were about $ 10 for a box of 10 media and even pre-formatted
RX01 8" media were very little more. Some companies
were alert enough to sell pre-formatted RX02 8" media
at a cost MUCH below the DEC price.
And YES!, I also did the same with a DSD floppy drive
in a company I worked for before I acquired my own
DSD floppy drive.
The DEC pricing model for supplies like floppy media and
tapes was one of the irritating aspects of using DEC hardware.
Hobby users usually found a work around. But I guess when
DEC sold only thousands of systems as opposed to millions
of Intel PC systems, the marketing model was a bit different.
I think I remember a show on the History Channel which
described the early efforts of hardware manufacturers. The
successful ones lowered their selling price below cost in the
anticipation that increased quantities would lower production
costs. Their increased production did lower the costs and
continue to lower the selling price. The companies which
attempted to initially sell at a profit were never able to increase
production sufficiently to match the lower costs of the companies
whose top management took the long view of total supply and
demand.
Jerome Fine