Hi, Alexander, > Be aware, that idebus does not mean UDMA speed (like UDMA33 or UDMA100) > or the speed in MB/sec. On actual PC architecture the 32bit PCI bus is > rated at 33 MHz as well the IDE bus. So setting idebus to anything other > than the default of 33 is nonsense. Then that means for normal ia-32 machines, the PCI&IDE Bus speed is mostly 33MHz/s, and so the sustainable IDE disk access speed is always no more than about 33MB/s? I tried several types of Linux boxes, the long-time disk access is about no more than 35MB/s. And there are no other means to accelerate disk access speed? Manuauly setting IDE disk's access mode (UDMA2/3/4/5/6) with hdparm has no big difference, as far as from my own experience. Any other ideas, besides buy ia-64 hosts? Thanks. --Guolin Cheng