> > On Tue, 2 Apr 2002 jim@rubylane.com wrote: > > 2. The MB IDE ports transfer data at about 18000K/sec while doing > > cat /dev/hda >/dev/null and looking at vmstat. > > I think the serverworks IDE is only mode4, not even UDMA33. I heard a lot of > bad things about it, and removed all the IDE drives from our serverworks > system's controller. > > > hdk. In a 32-bit slot, cat /dev/hdx >/dev/null shows 31300K/sec. But > > doing cat /dev/hde4 (a specific partition) for example gives > > 8400K/sec. That makes no sense to me. > > The outer cylinders of a drive are faster than the inner cylinders. Try > repartitioning the drive so that hde4 starts at cylinder 1, and see if that > changes the speed. That's not it because all 4 drives are partitioned the same, yet hde4 gives 8400K/sec and hdk4 gives 31000K. Also there are the same number of interrupts/sec and context switches per sec according to vmstat in the 8400 and 31000 case. > Maybe the promise cards and > the serverworks IDE controller are just crappy hardware, and are never going > to work correctly? I certainly can relate to that! Thanks for the feedback, Jim - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
