Bytes 10–11 The
sectors per track field indicates the number of physi-
cal sectors the drive allocates per track. The drive reports
the average number of physical sectors per track since
the number of sectors per track varies between the outer
and inner tracks.
Bytes 12–13 The
data bytes per physical sector field indicates the
number of data bytes allocated per physical sector.
Bytes 14–15 The
interleave field is the interleave value sent to the drive
during the last Format Unit command. This field is valid
only for Mode Sense commands. The drive ignores this
field during Mode Select commands. The interleave is
always 1:1.
Bytes 16–17 The
track skew factor field indicates the number of physi-
cal sectors on the media between the last logical block of
one track and the first logical block of the next sequential
track of the same cylinder. The actual track skew factor
being used by the drive is different for every zone. The
default value is 0002
H
which is the track skew factor for
the first zone. This default value is only used when tracks
per zone and alternate sectors per zone are set to 1.
If the initiator attempts to change the value of the track
skew factor, the drive responds with a good status. How-
ever, the initiator cannot directly change the track skew
factor.
Bytes 18–19 The
cylinder skew factor field indicates the number of
physical sectors between the last logical block of one
cylinder and the first logical block of the next cylinder. The
actual cylinder skew factor that the drive uses depends
on the zone. The default value is 0009
H
, which is the
cylinder skew factor for the first zone.
If the initiator attempts to change the value of the cylinder
skew factor, the drive responds with a good status. How-
ever, the initiator cannot directly change the cylinder skew
factor.
ST3655 Family SCSI Drives Product Manual, Rev. A
97
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