Int 13 Fn 0B  - Hard Disk - Write Long Sector(s) (at And Later)            [B]

   AH = 0Bh
   AL = number of sectors (01h may be only value supported)
   CH = low eight bits of cylinder number
   CL = sector number (bits 5-0)
        high two bits of cylinder number (bits 7-6)
   DH = head number
   DL = drive number (80h = first, 81h = second)
   ES:BX -> data buffer

Return: CF clear if successful
   CF set on error
   AH = status (see #0166)
   AL = number of sectors transferred

Notes: each sector's worth of data must be followed by four to seven bytes of
     error-correction information
   used for diagnostics only on PS/2 systems; IBM officially classifies
     this function as optional

See Also: AH=03h,AH=0Ah,MEM 0040h:0074h