Maxtor Atlas 10K V Product Manual page 128

Table 5-97
Field
PS
Number of Cylinders
Number of Heads
Starting Cylinder
Write
Precompensation
Starting Cylinder
Reduced Write
Current
Drive Step Rate
Landing Zone
Cylinder
RPL
Rotational Offset
Medium Rotation Rate
5-70 Maxtor Atlas 10K V
Rigid Disk Geometry Page-Field Descriptions (Page 4)
Parameters Savable. This bit is only used with the MODE SENSE com-
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.
The number of physical cylinders that hold host data.
The number of heads that can access host data.
The value in this field is the physical cylinder at
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,
write precompensation is disabled.
The value in this field is the physical cylinder at which write current is re-
duced. The first cylinder number is 0. If the starting cylinder for reduced
write current is equal to the value in the Number of Cylinders field, reduced
write current is disabled.
Applies to stepper-motor actuators. Not applicable.
This field indicates a two's complement location where the drive positions
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
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
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
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.
The disk rotation speed in RPM.
Description