M.2.2 Logical Format

M.2.2 Logical Format (Current)
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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.

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