Sector Layouts on Media

3.5” Floppy Disk

Sector 0 – Boot Sector
Sector 1 – 9 – FAT 1
Sector 10 – 18 – FAT 2
Sector 19 – 32 – Root Directory
Sector 33 – 2879 – Free Space

(There are no surplus sectors on a floppy diskette)


Iomega Zip 100MB

Sector 0 – Boot Sector
Sector 1 – 192 – FAT 1
Sector 193 – 384 – FAT 2
Sector 385 – 416 – Root Directory
Sector 417 – 196572 – Free Space
Sector 196573 – 196575 – Surplus Sector

(ClickHere.EXE program is often placed in sector 421 – 8748) – This is a software and products demonstration placed on the media by IOMEGA.


Iomega Jaz 1GB

Sector 0 – Boot Sector
Sector 1 – 256 – FAT 1
Sector 257 – 512 – FAT 2
Sector 513 – 544 – Root Directory
Sector 545 – 2090944 – Free Space
Sector 2090945 – 2090975 – Surplus Sectors

(50.EXE program is often placed in sector 577 – 3264) – This is a program that demonstrates 50 uses for your Iomega Jaz Media.


information was obtained personally using stated media and WinHex. www.winhex.com.

What is a surplus sector? According to Stefan Fleischmann creator of WinHex... "WinHex specifically supports access to surplus sectors that are not in use by the operating system because they do not add to an entire cluster or cylinder. "