Note. See the bit descriptions below for words 63, 88, and 93 of the Identify Drive data.
Description (if bit is set to 1)
| Bit | Word 63 |
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| 0 | Multiword DMA mode 0 is supported. |
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| 1 | Multiword DMA mode 1 is supported. |
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| 2 | Multiword DMA mode 2 is supported. |
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| 8 | Multiword DMA mode 0 is currently active. |
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| 9 | Multiword DMA mode 1 is currently active. |
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| 10 | Multiword DMA mode 2 is currently active. |
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| Bit | Word 88 |
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| 0 | Ultra DMA mode 0 is supported. |
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| 1 | Ultra DMA mode 1 is supported. |
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| 2 | Ultra DMA mode 2 is supported. |
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| 3 | Ultra DMA mode 3 is supported. |
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| 4 | Ultra DMA mode 4 is supported. |
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| 5 | Ultra DMA mode 5 is supported. |
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| 6 | Ultra DMA mode 6 is supported. |
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| 8 | Ultra DMA mode 0 is currently active. |
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| 9 | Ultra DMA mode 1 is currently active. |
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| 10 | Ultra DMA mode 2 is currently active. |
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| 11 | Ultra DMA mode 3 is currently active. |
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| 12 | Ultra DMA mode 4 is currently active. |
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|
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| 13 | Ultra DMA mode 5 is currently active. |
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|
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| 14 | Ultra DMA mode 6 is currently active. |
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28 | DB35.4 Series SATA Product Manual, Rev. C |