Seagate Ultra160 Product Manual page 241

SCSI Interface Product Manual, Rev. B
ber of notches. An active notch value of zero indicates that this and subsequent MODE SELECT and
MODE SENSE commands refer to the parameters that apply across all notches.
[6] The STARTING BOUNDARY field indicates the beginning of the active notch or, if the active notch is zero,
the beginning boundary of the drive. If the LPN bit is one, then the four bytes represent a LOGICAL
BLOCK ADDRESS. If the LPN bit is zero, then the three most significant bytes shall represent the cylinder
number and the least significant byte shall represent the head number. When used with the MODE
SELECT command, this field is ignored.
[7] The ENDING BOUNDARY field indicates the ending of the active notch or, if the active notch is zero, the
ending of the drive. If the LPN bit is one, then the four bytes represent LOGICAL BLOCK ADDRESS. If the
LPN bit is zero, then the three most significant bytes shall represent the cylinder number and the least sig-
nificant byte shall represent the head number. When used with the MODE SELECT command, this field is
ignored.
Each notch shall span a set of consecutive logical blocks on the drive, the notches shall not overlap, and
no logical block shall be excluded from a notch.
[8] The PAGES NOTCHED field is a bit map of the mode page codes that indicates which pages contain
parameters that may be different for different notches. The most significant bit of this field corresponds to
page code 3Fh and the least significant bit corresponds to page code 00h. If a bit is one, then the corre-
sponding mode page contains parameters that may be different for different notches. If a bit is zero, then
the corresponding mode page contains parameters that are constant for all notches.
[9] See individual drive's Product Manual, Volume 1, MODE SENSE Data section, for a table showing codes
that indicate which of these bits are changeable by the host using the MODE SELECT command.
223