5.42TEST UNIT READY Command (00h)
The TEST UNIT READY command returns GOOD status if the drive is ready to receive medium access commands (that is, READ, WRITE, VERIFY, etc.). If the drive is not ready to receive medium access commands, it returns CHECK CONDITION status with the appropriate sense keys and qualifiers. The data format is described in Table
Table
Bit | 7 | 6 | 5 | 4 |
| 3 | 2 | 1 | 0 |
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0 |
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| Operation | Code (00h) |
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1 - 4 |
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| Reserved |
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5 |
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| Control |
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