Maxtor 10K V manual 128

Table 5-97Rigid Disk Geometry Page-Field Descriptions (Page 4)

Field	Description
	Parameters Savable. This bit is only used with the MODE SENSE com-
PS	mand. A returned 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.
Number of Cylinders	The number of physical cylinders that hold host data.
Number of Heads	The number of heads that can access host data.
Starting Cylinder	The value in this field is the physical cylinder at
Write	which write precompensation is to begin. The first cylinder number is 0. If
	the starting cylinder is equal to the value in the Number of Cylinders field,
Precompensation
	write precompensation is disabled.
Starting Cylinder	The value in this field is the physical cylinder at which write current is re-
Reduced Write	duced. The first cylinder number is 0. If the starting cylinder for reduced
Current	write current is equal to the value in the Number of Cylinders field, reduced
	write current is disabled.
Drive Step Rate	Applies to stepper-motor actuators. Not applicable.
	This field indicates a two’s complement location where the drive positions
Landing Zone	the disk heads. A negative value indicates that the heads are positioned be-
	low cylinder 0 by that number of cylinders. A positive value greater than the
Cylinder
	number of cylinders indicates that the heads are positioned beyond the cyl-
	inders used for data storage at the location specified.
	Rotational Position Locking is used for spindle synchronization in storage
	arrays. The modes are:
	00b – Disabled
RPL	10b – Master
	01b – Slave
	11b – Not supported
	RPL can be overridden if the Maxtor (Vendor) Special Function Control
	page Auto field value = 1. This drive does not support spindle synchroniza-
	tion.
	Rotational Offset indicates the amount of rotational offset that the drive
	uses when synchronized. The rotational offset is applied in the retarded di-
	rection (lagging the synchronized spindle master). The value in the field is
	determined by the following formula:
	Offset = 0 … 255
	256
Rotational Offset	For example, a numerator of 128 indicates an offset of 1/2 revolution
	(180°).
	The valid parameter values are 0 to 255.
	The specified value may be rounded. Rotational offset is not used when the
	drive is configured as the synchronized-spindle master.
Medium Rotation Rate	The disk rotation speed in RPM.

5-70 Maxtor Atlas 10K V