Re: performance limitations of linux raid

[Seth Vidal]

> There's "specs" and then there's real life.  I have never seen a hard drive
> that could do this.  I've got brand new IBM 7200rpm ATA66 drives and I can't
> seem to get them to do much better than 6-7mb/sec with either Win98,
> Win2000, or Linux.  That's with Abit BH6, an Asus P3C2000, and Supermicro
> PIIIDME boards.  And yes, I'm using an 80 conductor cable.  I'm using
> Wintune on the windows platforms and bonnie on Linux to do benchmarks.

turn udma modes on in the bios and run hdparm -d 1 /dev/hda (where hda ==
drive device)

the re-run your specs

I think you'll find the speed is stepped up dramatically.
i'm getting 16MB/s write and 22MB/s read on the same drive.

I got for crap w/o the dma turned on via hdparm

-sv