Interface
(40)READ DMA EXT (X’25’)
•Description
This command is the extended command of the READ DMA command. The LBA specification is increased from 28 bits to 48 bits, and the maximum number of sectors that can be transferred by a single command is changed from 100h to 10000h. Other command controls are the same as those of the READ DMA command.
•Error reporting conditions
(1)The command was issued in CHS mode (ST = 51h, ER = 04h).
The other error reporting conditions are the same as those of the READ DAM command.
At command issuance (Shadow Block Registers setting contents)
CM | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | |
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DH | 1 | L | 1 |
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CH EXP |
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| LBA |
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CH |
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| LBA |
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CL EXP |
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| LBA |
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CL |
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| LBA |
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SN EXP |
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| LBA |
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SN |
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| LBA |
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SC EXP |
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| Sector count |
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SC |
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| Sector count |
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FR EXP |
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FR |
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At command completion (Shadow Block Registers contents to be read)
ST |
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DH | 1 | L | 1 |
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CH EXP |
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| LBA |
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CH |
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| LBA |
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CL EXP |
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| LBA |
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CL |
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| LBA |
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SN EXP |
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| LBA |
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SN |
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| LBA |
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SC EXP |
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SC |
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ER |
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| Error information |
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