Toshiba TECRA A11 Series Maintenance Manual page 278

[Error register] Ｐ – 1F1h
Bit Name
7 BBK（BadBlockMark） 0: Not used
6
UNC（uncorrectable）
5 - - -
4 IDN
（identification）
3 - - -
2
ABT（about）
1
TK0（track zero）
0 0 - - -
TECRA A11/S11/P11/Satellite Pro S500 Series Maintenance Manual (960-784) [CONFIDENTIAL] 3-169
1: Defective block mark detection.
0: No uncorrectable data error
1: Uncorrectable data occurrence
0: Not used
1: No ID field
0: Not used
1: Illegal command or command abort
0: Track 0 detection
1: Track 0 not detection
(When recalibrated)
Tests and Diagnostics
Function