7 Apr
2007
7 Apr
'07
10:08 p.m.
On 4/6/07, info <info at harrells.net> wrote:
IIRC, every possible spacing of pulses used in MFM encoding could also
occur in RLL encoding. So unless the drive tries to interpret the data
stream in some way -- and AFAIK no ST412-interfaced drives do, they just
record it on the disk -- any drive that can handle RLL encoding can also
handle MFM encoding.
-tony
I need or should use a MFM drive. I know the RLL
drives used a better
recording surface to get more data in the same size but the controller
is a MFM st506 from a Cromemco 250 system so it only knows MFM. I guess
I could use a RLL drive and low level format it but I don't remember if
that caused problems or not. Thanks
Formatting an RLL-certified drive with an MFM controller should not
cause any hassles - just a loss of capacity compared to the RLL
format. An ST238R formats just fine as an ST225.