Fujitsu MAY2036RC User Manual download pdf (Page 35)

3.1 Data Space

C141-E230 3-7

Each sector on the track consists of the following fields:

(1) Gaps (G1, G2, G3)

No pattern is written on the gap field.

(2) PLO Sync

In this field, pattern X'00' is written.

(3) Sync Mark (SM1, SM2)

In this field, special pattern is written. This special pattern indicates the beginning of the data field.

(4) Data field (DATA1-DATA4)

User data is stored in the data field of the sector. The length of the data field is equal to that of the

logical data block which is specified with a parameter in the MODE SELECT command. Any

multiple of 4 between 512 and 528 bytes can be specified as the length.

(5) BCRC

It is a 4-byte error detection code. Errors in the ID field. Single burst errors with lengths of up to 32

bits for each logical block can be detected.

(6) ECC

This is the 400 bits code that allows detection and correction of errors in the data field, which is

capable of correcting the single burst error up to 200 bits max. on the fly.

(7) PAD

A specified length of x‘00’ pattern is written in this field. This field includes the variation by rotation

and circuit delay till reading/writing.

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 93 94

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Fujitsu MAY2036RC User Manual Page 35