There are three options in dmode, wpc, ofs, and rwc, which are reported blank and produce errors on attempts to change. These types are listed in the rbfdefs as
* The following fields are not copied to the path descriptor
IT.WPC RMB 1 Write precomp cyl/4 (HD)
IT.OFS RMB 2 Starting cylinder offset (HD)
IT.RWC RMB 2 Reduced write current cylinder (HD)
Is this a dmode bug? How if at all are these types used? Why won't dmode report values and/or change them?
Anonymous
The dmode /i0 wpc=N command as used in the SuperIDE driver is like a High Byte for starting
Cylinder Offset letting you start as much as 8GB into a media this is an excellent feature I do
not know what IT.WPC RMB 1 Write precomp cyl/4 (HD) means but I think that the way it
is used for the super IDE is excellent even if that was not its original intended meaning.
As for values not being reported and unchangable those values are the ones that particular
driver does not support but that some other driver for some other medium does.
Last edit: Tormod Volden 2018-04-30