FUJITSU MHV2160BT - Manual (Page 117)

5.3 Host Commands
C141-E239 5-41
At command completion (Shadow Block Registers contents to be read)
ST Status information
DH x L x x HD No. / LBA
CH
CL
SN
SC
ER
Start cylinder No. [MSB] / LBA
Start cylinder No. [LSB] / LBA
Start sector No. / LBA [LSB]
00 (*1)
Error information
*1 If the command is terminated due to an error, the remaining
number of sectors of which data was not transferred is set in this
register.