Computer Drive - Floppy Disk Drive User Manual

Interface
5-22 C141-E224
5.2.4 Shadow block registers
(1) Error Field
The Error Field indicates the status of the command executed by the device.
The fields are valid when the ERR bit of the Status field is 1.
This register contains a diagnostic code after power is turned on, the COMRESET
or the EXECUTIVE DEVICE DIAGNOSTIC command is executed.
• [Status at the completion of command execution other than diagnostic
command]
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
X UNC X IDNF/ SFRW SFRR ABRT TK0NF AMNF
X: Unused
- Bit 7: Unused
- Bit 6: Uncorrectable Data Error (UNC). This bit indicates that an
uncorrectable data error has been encountered.
SATA Frame Error Write (SF RW). This bit indicates that a SATA
communication error has been encountered during the write process.
- Bit 5: Unused
- Bit 4: ID Not Found (IDNF). This bit indicates an error except for bad sector,
uncorrectable error and SB not found.
Or, SATA Frame Error Write (SFRW) This bit indicates that a SATA
communication error has been encountered during the write process.
In this case, bit4 and bit2 are set both.
- Bit 3: SATA Frame Error Read (SF RR). This bit indicates that a SATA
communication error has been encountered during the read process.
In this case, bit3 and bit2 are set both.
- Bit 2: Aborted Command (ABRT). This bit indicates that the requested
command was aborted due to a device status error (e.g. Not Ready,
Write Fault) or the command code was invalid.
- Bit 1: Track 0 Not Found (TK0NF). This bit indicates that track 0 was not
found during RECALIBRATE command execution.
- Bit 0: Address Mark Not Found (AMNF). This bit indicates that the SB Not
Found error occurred.
[Diagnostic code]
- X’00’: Format Unit is not completed.
- X’01’: No Error Detected.
- X’02’: HDC Diagnostic Error