(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.
The READ LONG command supports only single sector operation.
At command issuance (I/O registers setting contents)
1F7H(CM) | 0 | 0 | 1 |
| 0 |
| 0 | 0 | 1 | R | |
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1F6H(DH) | × | L |
| × |
| DV |
| Head No. /LBA [MSB] | |||
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| ||
1F5H(CH) |
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| Cylinder No. [MSB] / LBA |
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1F4H(CL) |
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| Cylinder No. [LSB] / LBA |
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1F3H(SN) |
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| Sector No. |
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| / LBA [LSB] |
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1F2H(SC) |
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| Number of sectors to be transferred |
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1F1H(FR) |
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| xx |
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| |
R = 0 or 1
At command completion (I/O registers contents to be read)
1F7H(ST) |
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| Status information | |||
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1F6H(DH) | × | L |
| × |
| DV | Head No. /LBA [MSB] |
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| |
1F5H(CH) |
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| Cylinder No. [MSB] / LBA | ||||
1F4H(CL) |
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| Cylinder No. [LSB] / LBA | ||||
1F3H(SN) |
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| Sector No. |
| / LBA [LSB] | ||
1F2H(SC) |
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| 00 (*1) | |
1F1H(ER) |
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| Error information | |||
*1 If the command is terminated due to an error, this register indicates 01.
(19)WRITE LONG (X'32' or X'33')
This command operates similarly to the READ SECTOR(S) command except that the device writes the data and the ECC bytes transferred from the host system to the disk medium. The device does not generate ECC bytes by itself. The WRITE LONG command supports only single sector operation.
This command is operated under the following conditions:
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