> Hello, > > I don't understand your answer Nicolas. > Because My bus is 33MHz I get 27MB/s. I understand that. > What I'm asking is if the UDMA(100) means that the HD is > capable of 100MB/s and the bus holds it back. Does it mean > that with a newer motherboard my HD will work much faster? > > Yuval Scharf
That's not what it means. Read the Kernel message carefully: > > > ide: Assuming 33MHz system bus speed for PIO modes; override with That only applies to PIO modes, not DMA modes. Your hard drive had is operating in DMA mode: > > > ide0: BM-DMA at 0xff00-0xff07, BIOS settings: hda:DMA, hdb:pio If you turn on all the "safe" optimizations for your drive as such: hdparm -c1 -d1 -m16 -u1 -A1 -a64 and then test it, what do you get? That's about the most you'll squeeze out of it. And there's no way you are ever going to see 100MB/s out of a single IDE drive, it's just a sales tool. If you get even 50MB/sec off of UDMA100, you're doing quite well... HTH, -- Jason Santos -- [EMAIL PROTECTED] mailing list
