Copying DEC VAX set up disks rx50, help

[Tony Duell]

> I dunno, RX50 format is easy to copy.  Make sure that your 1.2M drive 
> is declared as such in the BIOS setup--if it's confused with a 1.44MB 
> drive, it's not going to work, as 2D operation on a 1.2MB requires a 
> write clock (300KHz) that conforms to a 360 RPM drive.  A 1.44MB 
> drive is 300 RPM--so any attempt to write a 2D format using a 250KHz 
> clock rate is guaranteed to fail--you'll run out track before you run 
> out of data.

I once saw a PC multi-I/O card that couldn't do the 300kbps data rate, I 
think it just did it as 250kbps.... Needless to say that card went 
straight back to the suppliers...

Anyway, with so few people (other than on this list :-)) using 5.25" 
drives now, I wonder if most  modern PCs can still generate the 300kbps 
rate, If not, this could explain the problems the OP is having...

-tony