nData patterns cycled through for each pass:
u0x39c39c39U
u0x00ff00ffU
u0x0f0f0f0fU
u0xc6dec6deU
u0x6db6db6dU
u0x55555555U
u0xaaaaaaaaU Complement of previous data pattern.
u0x33333333U Continuous worst case pattern (media defects)
u0x26673333U Frequency burst worst case pattern #1.
u0x66673326U Frequency burst worst case pattern #2.
u0x71c7c71cU Dibit worst case data pattern.
u0x00000000U
u0xffffffffU
nMultiple slices also cycle through these data
patterns.
u