IBM channel-attached DASD emulation

[Paul Koning]

> On Dec 26, 2015, at 4:54 AM, Dave Wade <dave.g4ugm at gmail.com> wrote:
> 
> ...
> but IBM DASD are complex in that the physical block size can differ from track to track, and can be changed by the user.

From sector to sector, actually.  And sectors can have key fields along with the data -- the device will find a sector by key match on a track.  

	paul