At command issuance (I/O registers setting contents)
1F7H(CM) | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | |
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1F6H(DH) | × | × | × | DV |
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| xx |
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1F5H(CH) |
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| xx |
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1F4H(CL) |
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| xx |
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1F3H(SN) |
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| xx |
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1F2H(SC) |
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| xx |
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1F1H(FR) |
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| xx |
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At command completion (I/O registers contents to be read)
1F7H(ST) |
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| Status information |
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1F6H(DH) | × | × | × |
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| xx |
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1F5H(CH) |
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| xx |
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1F4H(CL) |
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| xx |
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1F3H(SN) |
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| 01H (*1) |
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1F2H(SC) |
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| 01H |
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1F1H(ER) |
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| Diagnostic code |
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*1 This register indicates X‘00’ in the LBA mode.
(17)FORMAT TRACK (X'50')
Upon receipt of this command, the device sets the DRQ bit and waits the completion of
The drive supports this command for keep the compatibility with previous drive only.
(18)READ LONG (X'22' or X'23')
This command operates similarly to the READ SECTOR(S) command except that the device transfers the data in the requested sector and the ECC bytes to the host system. The ECC error correction is not performed for this command. This command is used for checking ECC function by combining with the WRITE LONG command.
Number of ECC bytes to be transferred is fixed to 4 bytes and cannot be changed by the SET FEATURES command.
The READ LONG command supports only single sector operation.
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