/B Causes QCACHE to load as a stand-alone UltraDMA driver with no XMS memory. When /B or /U is given, /N is ignored. Other switches above can still be used as needed. /B will "pass" I-O unsuitable for UltraDMA to the BIOS. /B may lose much speed! It is a "LAST chance", if absolutely needed, or for diagnostic work. 还有关于QCDROM.SYS /D:SHSU-CDN /UF /L 的参数，/uf我怎么知道起不起作用那？ 在dos下每秒多少MB算不错的成绩哪？ [ Last edited by niutao1 on 2007-2-9 at 06:15 PM ]