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| 5.3 Host Commands | |
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| Table 5.29 FEATURE CONTROL COMMAND | |||||
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| 00, 01 | Action Code | 0004h | FEATURE CONTROL COMMAND |
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| 0001h | Set New State |
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| Return Current State |
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| 02, 03 | 0002h | Current Feature Control State is displayed in SN/SC |
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| Code |
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| 0003h | Return Option Flag |
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| Current Option Flag is displayed in SN/SC field. |
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| 0001h | Write Cache |
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| 04, 05 | Feature Code |
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| 0002h | Write Reordering |
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| 0003h | Set time interval for temperature logging |
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| Feature Code = 0001h (Set Write Cache) |
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| 0001h: Allow write cache operation to be determined |
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| by ATA Set Feature command. |
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| 0002h: Force Write Cache enabled. |
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| 0003h: Force Write Cache disable. |
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| Feature Code = 0002h(Set Write Reordering) |
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| 06, 07 | New State | (2 byte) | 0001h: | Enable Write Reordering |
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| 0002h: | Disable Write Reordering |
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| Feature Code = 0003h(Set time interval) |
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| 0000h: |
| Invalid |
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| (ex.) 0001h: | Temperature data collection |
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| interval is 1min. |
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| 000Fh: | Temperature data collection |
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| interval is 15min. |
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| Bit0: 1 = | Maintain the state at |
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| 08, 09 | Option Flag | (2 byte) |
| COMRESET/Power cycle. |
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| 0 = | Revert to default setting at |
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| COMRESET/Power cycle. |
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| 0A to 1FF | (Reserved) | - | Reserved |
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