Quantum 10K II Manual de usuario descargar pdf (Pagina 175)

SCSI Description

5–108 Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives

MODE SENSE (6) Command (1Ah) (continued)

Table 5–49 Rigid Disk Geometry Page — Field Descriptions

Field Value Description

PS 1 Parameters Savable. This bit is only used with the

MODE SENSE command. 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 17338 The number of physical cylinders that hold host data.

Number of Heads 3/5/10/20 The number of heads that can access host data.

Starting Cylinder - 17338 The value in this field is the physical cylinder at

Write Precompensation 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.

Starting Cylinder - 0 The value in this field is the physical cylinder at

Reduced Write Current which write current is reduced. 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.

Drive Step Rate 0 Applies to stepper-motor actuators. Not applicable.

Landing Zone Cylinder 17338 This field indicates a two’s complement location

where the drive positions the disk heads. A negative

value indicates that the heads are positioned below

cylinder 0 by that number of cylinders. A positive

value greater than the number of cylinders indicates

that the heads are positioned beyond the cylinders

used for data storage at the location specified.

RPL 00b 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 Quantum (Vendor) Special

Function Control page Auto field value = 1. This drive

does not support spindle synchronization.

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Quantum 10K II Manual de usuario Pagina 175