INT 21 - Novell NetWare - GET VOLUME USAGE                                      
	AX = F216h subfn 2Ch
	CX = length of request packet in bytes
	DX = length of reply buffer in bytes
	DS:SI -> request packet (see #02148)
	ES:DI -> reply buffer (see #02149)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=20h,AX=F216h/SF=29h


Format of NetWare "Get Volume Usage" request packet:
Offset	Size	Description	(Table 02148)
 00h	WORD	length of following data
 02h	BYTE	2Ch (subfunction "Get Volume Usage")
	???