Specifications

8.8.10 Mode Page 0C (Notch Parameters)
(MSB) Pages Notched =
000000000000100Ch
(LSB)
16
|
23
(MSB)
Ending Boundary
(LSB)
12
|
15
(MSB)
Starting Boundary
(LSB)
8
|
11
7
(MSB)
Active Notch
(LSB)
6
5
(MSB)
Maximum Number of Notches = 011h
(LSB)
4
Reserved = 03
RSVD = 0
LPN =
0
ND
=1
2
Page Length = 16h1
Page Code = 0Ch
RSVD=
0
PS =
1
0
01234567
Bit
Byte
Figure 95. Page 0C (Notch Parameters)
The notch page contains parameters for variable number of blocks per cylinder. Each section of the logical
unit with a different number of blocks per cylinder is referred as a notch. The only field that is changeable
is Active Notch field.
! ND of one means that the drive is a notched drive.
! LPN of zero means that the notches are based upon physical parameters of the drive (cylinder #), not
logical parameters.
! Maximum Number of Notches is the number of notches the drive can support.
! Active Notch indicates to which notch subsequent MODE SELECT/SENSE command parameters
pertain. A value of 0 is used for parameter values which apply to all notches. Values from 1 to the
maximum value depending on the model specify the notch number, where notch 1 is the outermost
notch. The following mode parameters are based on the current active notch:
Mode Page 2
- Read Buffer Full Ratio
- Write Buffer Empty Ratio
Ultrastar 146Z10 hard disk drive specifications
102