M.2.2 Logical Format
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### M.2.2 Logical Format

The Logical Format for the 130 mm 4.1GB disk shall be the PC File System (see Annex A).

The boot sector defined in Annex A shall have the following values.

Table M.2-1. Boot Parameter Values for 130mm 4.1GB Magneto-Optical Disk

Byte(s) | Value | Description
--- | --- | ---
11 - 12 | 0200H | 512 bytes/sector
13 | 40H or 80H | Sectors / cluster, either 64 or 128. See Note.
21 | F8H | Flag for disk type F8H = Hard Disk.
24 - 25 | 003EH (Nominal) | Nominally 62 sectors/track, but may vary, and any value should not affect interoperability.
26 - 27 | 0001H (Nominal) | Nominally 1 head, but may vary, and any value should not affect interoperability.

### Note

Lower values would not utilize all the disk sectors on a side.

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