Media: gigabit coaxial copper, SLDB
Record Length: fixed, 7 frames

TS\Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

1

V

T

C

PT

PT Ext

Phi

2

V

T

C

PT

PT Ext

Phi

3

V

T

C

PT

PT Ext

Phi

4

V

T

C

PT

PT Ext

Phi

5

V

T

C

PT

PT Ext

Phi

6

V

ISO

T

C

PT

PT Ext

Phi

7

Vertical Parity

Field Definitions

note: empty cells will contain zeros

V = set to indicate valid track data in bits[14:0]

T = Set to indicate a tight match to a CPS cluster*

C = track curvature

PT = Track PT bin ("00" = Max, "01" = High, "10" = Medium, "11" = Low)

PT Ext = Extended PT information

Phi = The relative address (within a sector) of the track H layer doublet, range 1-44

ISO = set to indicate that there is only one track in the sector and it is an isolated track*

* DFEA2 only; the DFEA forces these bits to zero.

General Information

This record contains the six highest PT tracks found in the sector. The tracks are sorted by PT in descending order. If fewer than six tracks are present the tracks will be moved up to the beginning of the record and remaining frames will be padded with zeros. The vertical parity bits are always in frame 7. The track sorting algorithm is not perfect and may occasionally result in the loss of a track -- refer to the DFEA TDR for details.

Revision History

1 November 2005: created JTO
3 January 2005: parity links
4 January 2006: added CPS match bit
24 January 2006: added Isolated bit in frame 6
23 March 2006: dfea2 name change