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12.13.9
Notch page (0Ch)
The Notch page contains parameters for direct access devices that implement a variable number of blocks per
cylinder and support this page. Each section of the drive with a different number of blocks per cylinder is
referred to as a notch.
These values are not changeable.
Note.
Table 154: Notch page (0Ch)
Bit
7
Byte
0
PS
Page Length (16h)
1
2
ND
Default
3
0
Default
4,5
(MSB)
Default
6,7
(MSB)
Default
8–11
(MSB)
Default
12–15
(MSB)
Default
16–23
(MSB)
Default
Field definitions (listed alphabetically)
Table
number
Active Notch
154
The notch to which this and subsequent Mode Select and Mode Sense commands refers, until the active notch is changed
by a later Mode Select command. The value of the active notch is greater than or equal to zero (0) and less than or equal to
the Maximum Number of Notches field value.
0
This and subsequent Mode Select and Mode Sense commands refer to the parameters that apply across all
notches.
Ending Boundary
154
The ending of the active notch or, if the active notch is zero (0), the ending of the drive. If the LPN bit is 1, then the four
bytes represent the logical block address. If the LPN bit is zero (0), the three most significant bytes represent the cylinder
number and the least significant byte represents the head number. When used with the Mode Select command this field is
ignored.
Each notch will span a set of consecutive logical blocks on the drive, the notches will not overlap, and no logical block will
be excluded from a notch.
Fibre Channel Interface Manual, Rev. D
6
5
0
0
Reserved
0
0
LPN
0
0
Maximum Number of Notches
4
3
0
1
Page Code (0Ch)
0
0
Reserved
0
0
Reserved
Active Notch
Starting Boundary
Ending Boundary
Pages Notched
2
1
1
0
0
0
0
0
(LSB)
(LSB)
(LSB)
(LSB)
(LSB)
0
0
0
0
235
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