Toshiba M200-ST2002 Maintenance Manual - Page 154

3 Tests and Diagnostics 3.20 HDC Status 3.20 HDC Status When an error occurs in the hard disk test, the following message is displayed: HDC status = XXXX The hard disk test error status is displayed on the screen by a four-digit number. The hard disk controller error status is composed of two bytes; the first byte displays the contents of the HDC error status register and the second byte displays the HDC error register. Each of them are indicated in hexadecimal form The contents of the HDC error status register and error register are listed in Tables 3-5 and 3-6. Table 3-5 Hard disk controller status register contents Bit Name 7 BSY (Busy) 6 DRDY (Drive ready) 5 DWF (Drive write fault) 4 DSC (Drive seek complete) 3 DRQ (Data request) 2 CORR (Corrected data) 1 IDX (Index) 0 ERR (Error) Description "0" ... HDC is ready. "1" ... HDC is busy. "0" ... Hard disk drive is not ready to accept any command. "1" ... Hard disk drive is ready. "0" ... DWF error is not detected. "1" ... Write fault condition occurred. "0" ... The hard disk drive heads are not settled over a track. "1" ... The hard disk drive heads are settled over a track. "0" ... Drive is not ready for data transfer. "1" ... Drive is ready for data transfer. "0" ... Not used "1" ... Correctable data error is corrected. "0" ... Not used "1" ... Index is sensed. "0" ... Not used "1" ... The previous command was terminated with an error. 3-52 Portege M200 Maintenance Manual (960-457)