nData
buffers page aligned by default.
ualign=value
to misalign (e.g. align=rotate)
nPad
bytes allocated for data buffers.
uOn writes, initialized with inverted pattern.
uOn reads, verified after normal data.
nCapacity
set via seek/reads or IOCTL.
ucapacity=value sets user capacity.
nData
verification enabled by default.
u