Mode Page 0C (Notch Parameters) - IBM Ultrastar 36LZX Specifications

8.8.10 Mode Page 0C (Notch Parameters)

Byte
7 6
PS = RSVD=
0
0 0
1
ND LPN =
2
= 1 0
3
4
(MSB)
5
6 (MSB)
7
8 (MSB)
|
11
12 (MSB)
|
15
16 (MSB)
|
23
Figure 90. Page 0C (Notch Parameters)
The notch page contains parameters for direct-access devices which implement a variable number of
blocks per cylinder. Each section of the logical unit with a different number of blocks per cylinder is re-
ferred as a notch. The only field that is changeable is the Active Notch field.
ND = ONE meaning that this device is a notched drive.
LPN = ZERO meaning 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. Following
mode parameters are based on the current active notch:
Ÿ Mode Page 2
- Read Buffer Full Ratio
- Write Buffer Empty Ratio
Bit
5 4 3
Page Code = 0Ch
Page Length = 16h
RSVD = 0
Reserved = 0
Maximum Number of Notches = 0Bh
Active Notch
Starting Boundary
Ending Boundary
Pages Notched =
000000000000100Ch
Ultrastar 36LZX hard disk drive specifications
2 1 0
(LSB)
(LSB)
(LSB)
(LSB)
(LSB)
117