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5.1 Mode Parameters
Note:
Normally, the number of tracks (logical heads) per cell is set in the track
count/zone, but in the case of notching only, the total track count (number of
cylinders in the zone x number of logical heads) of the affected zone is
reported.
If this parameter is issued, only the format parameter of the zone specified by the
MODE SENSE command can be referred to without changing the number of
accessible blocks.
Also, if a MODE SELECT command with a SP = "1" that includes a notch page is
issued, the current value is reported for this page and the zone value which is the
object is reported if Page 3 is notched, then the command is terminated normally.
However, in the case of the FORMAT CORRUPTED state, caution is necessary
because the value following changing of the Format parameter is reported.
The contents of each parameter are explained below.
a. ND (Notch Drive)
"0": Since the device is not in the notched state, "0" is reported for LPN,
active notch, starting boundary and ending boundary.
"1": Since the device is in the notched state, the starting boundary and ending
boundary for the zone number (+1) shown in the active notch is set in the
format specified in the LPN Bit.
b. LPN (Logical or Physical Notch)
"0": This shows that the boundary address is based on the physical address
format. At that time, the higher order 3 bytes show the logical cylinder
number and the lowest order byte shows the logical head number.
"1": This shows that the boundary address is based on the 4-byte logical block
address format.
This bit is a bit which must be set during MODE SELECT.
c. Maximum Number of Notches
This indicates the number of device zones. 29 (X'1D') zones are set for all
drives.
d. Active Notch
This specifies the zone number 1 to 29 of a notching zone. If "0" is specified,
the page and parameter changed by the notch page, and the notch page itself,
are changed to the initial value. If a value which exceeds the maximum
number of notches has been specified, the test ends by "CHECK
CONDITION" status (ILLEGAL REQUEST [=5]/Invalid parameter in List
[=26-00]).
This field is a field which must be set during MODE SELECT.
e. Starting Boundary
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