Emulex MD21/S2, Technical Manual

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Disk Operations
SECTOR
4
_TL
ln
INDEX
HEADER ID
__ A _
a
*
INTER
SECTOR
GAP
PLO
SYNC
SYNC
BYTE
FE
h
CYLINDER
NUMBER
(MSB)
CYLINDER
NUMBER
(LSB)
TRACK
NUMBER
SECTOR
NUMBER
FLAGS CRC
PAD
WRITE
SPLICE
PLO .
SYNC /
— *—
1 BYTE
--v-
1 BYTE
------ "Y-------
1 BYTE
-------y.----
1 BYTE
~ ------
Y
-----
2 BYTES
------ V-----
1 BYTE
O DVTCC
SECTOR
™ n _
SYNC DATA
ECC
PAD
SPEED
TOLER-
* * * *
INTER
SECTOR
z
H
I
u
.
ANCE
GAP
---- V ----
256 OR 512 BYTES
A
6 BYTES 2 BYTES
‘ REPORTED BYTES AFTER INDEX FROM THE DRIVE
“ REPORTED PLO FIELD FROM THE DRIVE +1
‘ “ IF THE DRIVE REQUIRES A SPEED TOLERANCE GAP THIS LENGTH IS THE UNFORMATTED
SECTOR SIZE TIMES .01 OR .02 DEPENDING ON WHAT THE DRIVE REPORTS.
“ “ REPORTED INTER SECTOR GAP MINUS REPORTED BYTES AFTER INDEX.
MD2103-0821
Figure 4-1. Sector Format for Hard-Sectored Disk Drives
Drive Configuration Parameters 4-7