Setting of the UDMA mode will not alter the speed of the SATA interface transfer. SATA transfer speed is depending upon the negotiated interface speed of either Gen II 3.0 Gbps or Gen I 1.5 Gbps. The mode setting in the Set Feature command is for backward compatibility purpose.
8.2.30 Set Max Address (F9h, 37h: extended)
Set Max Address command is for device implement the Host Protected Area feature set. The drive maximum address can be changed according to the command issued from the host. The Set Max command has the following subcommands:
Table 8-13 Set Max Feature Register Values
Feature Value | Command |
0 | Obsolete |
1 | SET MAX SET PASSWORD |
2 | SET MAX LOCK |
3 | SET MAX UNLOCK |
4 | SET MAX FREEZE LOCK |
Reserved |
8.2.31 Set Multiple Mode (C6h)
This command enables the drive to perform Read and Write Multiple operations and establishes the block count for these commands.
The Sector Count register is loaded with the number of sectors per block. Drives support block sizes of 2, 4, 8, and 16 sectors. If the Sector Count register contains a valid value and the block count is supported, the value is loaded for all subsequent Read Multiple and Write Multiple commands and execution of those commands is enabled. If a block count is not supported, an Aborted Command error is posted, and Read Multiple and Write Multiple commands are disabled.
At
8.2.32 Sleep (E6h)
This command is the only way to cause the drive to enter Sleep Mode. The drive is spun down, and when it is stopped, BSY is cleared, an interrupt is generated, and the interface becomes inactive.
The only way to recover from Sleep mode without a reset or
8.2.33 Standby (E2h)
This command causes the drive to set BSY, enter the Standby Mode, clear BSY, and assert INTRQ. INTRQ is asserted even though the device may not have fully transitioned to Standby Mode.
If the Sector Count register is
The value in the Sector Count register when the STANDBY command is issued shall determine the time
Spinpoint M8 Product Manual REV 2.3 | 64 |
