Hitachi HCS721025CLA382, HCS721050CLA382, A7K2000 Error Recovery Control command action code 0003h

9.18.3.2Error Recovery Control command (action code : 0003h)

Inputs: (Key Sector)

Word	Name	Value	Description
0	Action Code	0003h	Set the read and write error recovery time
1	Function Code	0001h	Set New Value
		0002h	Return Current Value
2	Selection Code	0001h	Read Timer
		0002h	Write Timer
3	Value	Word	If the function code is 0001h, then this field contains the
			recovery time limit in 100ms units. The minimum SCT
			timeout value is 65 (=6.5 second). When the specified time
			limit is shorter than 6.5 second,the issued command is
			aborted.
255:4	reserved	0000h

Table 57 Error Recovery Control command (Inputs)

Outputs: (TF Data)

Command Block Input Registers (Success)

Error	00h
Sector Count	If Function Code was 0002h, then this is the LSB of the requested recovery limit.
	Otherwise, this field is reserved.
Sector Number	If Function Code was 0002h, then this is the MSB of the requested recovery limit.
	Otherwise, this field is reserved.
Cylinder Low	reserved
Cylinder High	reserved
Device/Head	reserved
Status	50h

Table 58 Error Recovery Control command (Onputs)

The Error Recovery Control command can be used to set time limits for read and write error recovery. For non-queued commands, these timers apply to command completion at the host interface. For queued commands where in order data delivery is enabled, these timers begin counting when the device begins to execute the command, not when the command is sent to the device. These timers do not apply to streaming commands, or to queued commands when out-of-order data delivery is enabled.

These command timers are volatile. The default value is 0 (i.e. disable command time-out).

Hitachi hard disk drive specifications

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