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Format of parameter block for function 62h

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Offset Size Description

00h

BYTE

 reserved, must be zero (DOS <3.2):
bit 0 :
0 = verify single track
1 = verify multiple tracks
bits 1-7 : reserved, must be zero

value on return (DOS 3.3+):
00h = specified tracks, sectors/track supported by BIOS
01h = function not supported by BIOS
02h = specified tracks, sectors/track not allowed for drive
03h = no disk in drive

01h

WORD

 number of disk head

03h

WORD

 number of disk cylinder

05h

WORD

 number of tracks to verify (equivalent to 255 or fewer sectors)