DSSD 26 Each 256 Byte Sector Track Format

This is an IBM 3740 Standard format.

Field Length Data Clock Value (179X)
Gap I400xFFNA0xFF
Sync I60x00NA0x00
IM10xFC0xD70xFC
GAP III260xFFNA0xFF
Following repeated 15 times to ***
Sync III60x00NA0x00
AM 110xFE0xC70xFE
Cyl #10-76NA0-76
Head #10NA0
Rec #11-15NA1-15
N11NA1
CRC2CRCNA0xF7 (generates both CRC bytes)
GAP II110xFFNA0xFF
Sync II60x00NA0x00
AM 210xFB0xC70xFB
Data2560xE5NA0xE5
CRC2CRCNA0xF7 (generates both CRC bytes)
GAP III270xFFNA0xFF
***
GAP IV~5980xFFNA0xFF
Total Bytes/Sector316
Total Bytes/Track5208

Bill

1504 MST 8 May 2013