Formatted Physical Sector Allocation - HP C2488A Technical Reference Manual

INDEX/SECTOR
) Write
Splice
1
4 Bytes
ipost Sector
i
Gap
i
4 Bytes
Data
PLO
Sync
14 Byles
(00)
Write
Splice
4 Bytes
Data
Sync
Pattern
1 Byte
(BE)
---~----------.---------.-
..
Header
PLO Sync
23 bytes
(00)
Dala
Field
512
Bytes
Header
Sync
Pattern
1 Byte
(BE)
Data
ECC
18 Bytes
Header
Address'
4 Bytes
Note 1
Data
CRC
2 Bytes
Header
CRC
2 Bytes
Data
Pad
6 Byte
(0)
Header )
Pad
8 Bytes
(00) (
Intersector
Gap
7 Bytes
Note 2
(NUMBERS IN PARENTHESIS REPRESENT
PA TTERN WRITTEN ON DISK)
"Zpdm303
NOTES:
1. FOUR BYTE HEADER ADDRESS FORMAT
BYTE n1: FLAG BYTE
BYTE n2: PHYSICAL TRACK ADDRESS MSB
BYTE n3: PHYSICAL TRACK ADDRESS LSB
BYTE n4: LOGICAL SECTOR ADDRESS
2.
~CLUDES
SPEED TOLERANCE BYTES.
Figure 3·2. Formatted Physical Sector Allocation
3·14 Product Features DRAFT
1/18/93 09:58