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FUJITSU MAV2036RC User Manual

Page 34

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Data Format

3-6

C141-E219

Head

Track skew

Track skew

Head skew

Leading logical
sector in head p+1

Head

Figure 3.5 Track skew/head skew


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 IDD automatically determines appropriate values for the track
skew factor and the head skew factor according to the specified logical data block length. The value
can be read out by the MODE SENSE or MODE SENSE EXTENDED command after the track has
been formatted.


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

PAD

SM1

PLO

Sync

G1

SCT

G2

DATA1 SM2

BCRC

DATA2

ECC

SCT

PAD

SM1

PLO

Sync

G1

SCT

G3

DATA1 SM2 DATA3 PAD G2

SM1

PLO

Sync

G1

DATA1 SM2 DATA4

Servo

BCRC ECC

Figure 3.6 Sector format

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