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INT 21 - Novell NetWare - DIRECTORY SERVICES - GET VOLUME INFO WITH HANDLE
        AH = E2h subfn 15h
        DS:SI -> request buffer (see below)
        ES:DI -> reply buffer (see below)
Return: AL = status
            00h successful
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=02h,AH=E2h/SF=06h,AH=E2h/SF=19h,AH=E3h/SF=E9h

Format of request buffer:
Offset  Size    Description
 00h    WORD    0002h (length of following data)
 02h    BYTE    15h (subfunction "Get Volume Info With Handle")
 03h    BYTE    directory handle

Format of reply buffer:
Offset  Size    Description
 00h    WORD    (call) 001Ch (length of following results buffer)
 02h    WORD    sectors per block (big-endian)
 04h    WORD    total blocks on volume (big-endian)
 06h    WORD    blocks available on volume (big-endian)
 08h    WORD    total directory slots  (big-endian)
 0Ah    WORD    directory slots available (big-endian)
 0Ch 16 BYTEs   NUL-padded volume name
 1Ch    WORD    flag: volume removable if nonzero (big-endian)

See Also: 21DA
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