Maxtor 10K V 5.12.7Disconnect–ReconnectPage (02h)

5.12.7Disconnect–Reconnect Page (02h)

The Disconnect–Reconnect Page provides the application client the means to attempt to optimize the performance of the delivery subsystem. The data format and field descriptions are described in Table 5-62and Table 5-63.

Table 5-62Disconnect–Reconnect Page (Page 2)

Byte		Bit	7	6		5		4		3	2	1	0
	0		PS	Rsvd						Page Code (02h)
	1						Page Length (0Eh)
	2						Buffer Full Ratio
	3						Buffer Empty Ratio
4	–	5					Bus Inactivity Limit
6	–	7					Disconnect Time Limit
8	–	9					Connect Time Limit
10	–	11					Maximum Burst Size
	12		EMDP		Fairness Arbitration					DImm		DTDC
	13								Reserved
14	–	15						First Burst Size

	Table 5-63Disconnect-Reconnect-Field Descriptions (Page 2)
Field	Default	Description
	Value
		Parameters Savable. This bit is only used with the MODE SENSE command. A re-
PS	0	turned value of 1 indicates that the target is capable of saving the page in a non-
		volatile, vendor-specific location. The bit is reserved with the MODE SELECT
		command.
Buffer Full		The Buffer Full Ratio indicates how full the buffer should be prior to requesting an
	0	interconnect tenancy. Applies to READ operations only. The default of 0 indicates
Ratio
		to the drive that it should use its default ratio.
Buffer Empty		The Buffer Empty Ratio indicates how full the buffer should be prior to requesting
	0	an interconnect tenancy. Applies to READ operations only. The default of 0 indi-
Ratio
		cates to the drive that it should use its default ratio. Not supported by the drive.
Bus Inactivity	0	The Bus Inactivity Limit indicates the maximum duration of any interconnect ten-
Limit		ancy during which no data is transferred. Not supported by the drive.
		The Disconnect Time Limit specifies the minimum time, in 100 microsecond in-
Disconnect		crements, that the drive waits after releasing the SCSI bus before reselecting. The
	0	drive supports a maximum value of 0xFF. Values greater than 0xFF are treated as
Time Limit
		0xFF. The default value of 0 indicates that the drive can reslect immediately after
		releasing the bus.
Connect Time	0	The Connect Time Limit indicates the maximum duration of a single interconnect
Limit		tenancy. Not supported by the drive.
		The Maximum Burst Size
		specifies the maximum amount of data that the drive will transfer during a data
Maximum Burst		phase before disconnecting from the bus, assuming it was given the disconnect
	0	privilege. This value is expressed in increments of data sectors (that is, a value of
Size
		1 indicates 512 bytes, a value of 2 indicates 1024 bytes). The default value of 0 in-
		dicates that there is no limit on the amount of data transferred per connection. This
		field is reserved for the SCSI-1/CCS operating mode.

5-42 Maxtor Atlas 10K V