Table 5-71Notch and Partition Page-Field Descriptions

Data Field

Description

 

 

 

Parameters Savable. This bit is only used with the MODE SENSE command. The

PS

returned value of 0 indicates that the target is not capable of saving this page in a

non-volatile vendor specific location. This bit is reserved with the MODE SE-

 

 

LECT command.

 

 

 

Notched (banded) Drive. A value of 0 indicates that the drive is not notched and

ND

that all other parameters in this page are returned as 0.

The default value of 1 indicates that the device is notched. For each supported ac-

 

 

tive notch value, this page defines the starting and ending boundaries of the notch.

 

 

 

Logical or Physical Notch. The default value of 0 indicates that the boundaries of

 

the notch are based on the physical parameters of the logical unit. The cylinder is

LPN

considered most significant and the head least significant.

 

 

A value of 1 indicates that the notch boundaries are based on logical blocks of the

 

logical unit.

MaxNotch

This field indicates the maximum number of notches supported by the logical unit.

The value cannot be changed.

 

 

The Active Notch field indicates the notch referenced by this, and subsequent

 

MODE SELECT and MODE SENSE commands. The value in this field can be

Active Notch

changed by a later MODE SELECT command. The value of the active notch must

be = 0 and = 24. An active notch of 0 indicates that this and subsequent MODE

 

 

SELECT and MODE SENSE commands refer to the parameters that apply across

 

all notches.

 

This field indicates the beginning of the active notch or, if the active notch is 0, the

 

beginning boundary of the logical unit. If the LPN value is 1, the starting boundary

 

is a Logical Block Address.

Starting Boundary

If the LPN value is 0, the three most significant bytes designate the starting cylin-

 

 

der number and the least significant byte is the starting head number. This field is

 

unchangeable. When used with the MODE SELECT command, this field is ig-

 

nored.

Ending Boundary

This field indicates the ending of the active notch, or if the active notch is zero, the

ending of the logical unit. If the LPN value is 0, the 3 most significant bytes des-

 

ignate the ending cylinder and the least significant byte is the ending head number.

 

This is a 64-bit bitmap that indicates which MODE command pages contain pa-

 

rameters that may be different for different notches. The most significant bit

 

(MSB) corresponds to Page 3Fh (Vendor-Unique Caching Page), and the least sig-

 

nificant bit (LSB) corresponds to Page 00h

Pages Notched

(Unit Attention Control Page).

If a bit is 1, the corresponding mode page contains parameters that may be differ-

 

 

ent for different notches.

 

If a bit is 0, the corresponding mode page contains parameters that are constant for

 

all notches.

 

The value of 1 in bits 3 and 12 indicates that Page 03h and 0Ch contain different

 

parameters for different notches.

Maxtor Atlas 10K V

5-51