Seagate Barracuda 7200.7 ST3120022A, Product Manual

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Barracuda 7200.7 Product Manual, Rev. D 33
4.1.3 Set Features command
This command controls the implementation of various features that the drive
supports. When the drive receives this command, it sets BSY, checks the
contents of the Features register, clears BSY and generates an interrupt. If the
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
0 Multiword DMA mode 0 is supported.
1 Multiword DMA mode 1 is supported.
2 Multiword DMA mode 2 is supported.
8 Multiword DMA mode 0 is currently active.
9 Multiword DMA mode 1 is currently active.
10 Multiword DMA mode 2 is currently active.
Bit Word 88
0 Ultra DMA mode 0 is supported.
1 Ultra DMA mode 1 is supported.
2 Ultra DMA mode 2 is supported.
3 Ultra DMA mode 3 is supported.
4 Ultra DMA mode 4 is supported.
8 Ultra DMA mode 0 is currently active.
9 Ultra DMA mode 1 is currently active.
10 Ultra DMA mode 2 is currently active.
11 Ultra DMA mode 3 is currently active.
12 Ultra DMA mode 4 is currently active.
13 Ultra DMA mode 5 is currently active.
Bit Word 93
13 1 = 80-conductor cable detected, CBLID above V
IH
0 = 40-conductor cable detected, CBLID below V
IL