Steve, > > Are any of the disks not healthy? Do you see any I/O > errors in dmesg? > > In my vmstat report, I it is an average per minute not > per-second. Also, I found that in the first minute of the > very first run, the HP's "bi" > value hits a high of 221184 then it tanks after that. Based on the difference in I/O wait on the two machines, there's definitely something up with the disk subsystem on the HP - try checking the BIOS on the HP 642 - I bet you'll find a disk error lurking there. - Luke