Sector Format; Figure 3.5 Track Skew/Head Skew; Figure 3.6 Sector Format - Fujitsu MBA3147RC - Enterprise 147 GB Hard Drive Product Manual

Data Format
Track skew
Head
Head
The number of physical sectors (track skew factor and head skew factor) corresponding to the skew
time varies depending on the logical data block length because the track skew and the head skew are
managed for individual sectors. The HDDs automatically determine appropriate values for the track
skew factor and the head skew factor according to the specified logical data block length.
3.1.4

Sector format

Each sector on the track consists of an ID field, a data field, and a gap field which separates them.
Figure 3.6 gives sector format examples.
SCT
PLO
SM1 DATA1 SM2
G1 Sync
SCT
PLO
SM1 DATA1 SM2 DATA3 PAD G2
G1 Sync
32
Track skew
Figure 3.5 Track skew/head skew
DATA2 BCRC ECC
PAD
G2
Servo
PLO
G1 Sync
Figure 3.6 Sector format
Head skew
Leading logical
sector in head p+1
SCT
SM1 DATA1 SM2 DATA4
SCT
BCRC ECC
PAD
G3
C141-E252