Roy Sigurd Karlsbakk wrote:
> > I always use SCSI systems that allow combined writes. But the original
> > post said the drives were U160 scsi; I didn't catch whether this was
> > software RAID or using a hardware controller, but I think it said
> > hardware controller. So that leads to the question of whether the
> > hardware controller is able to spread out reads or writes. (my systems
> > were also all SMP, which might matter, but the 30 MB/sec spec on single
> > drives I mentioned is non-RAID with an intelligent hot swap backplane)
> I've been trying both hw and sw raid. Now, I've got a new controller
> giving me 60MB/sec from a software RAID-0. I haven't tried hw RAID on the
> new controller yet, but I will.
> The system is a Compaq ProLiant DL380: 3-peer PCI system with 1GBps memory
> bus, 1,2GB RAM, 2xPIII1266 and a nice steel-gray 2U-case.
What chipset is the motherboard? And do you have IO-APIC enabled? See if
irq's appear under both cpu's in /proc/interrupts...if they are spread
out on both cpu's it is enabled.
Now you mention a high memory bandwidth, but is this still a standard
PCI slot (thus 33 MHz/32 bit)? If so, it'd be kind of like putting a
fast AGP graphics card in an ordinary PCI slot...it would be a
bottleneck between the higher bandwidth and the card.
D. Stimits, stimits@xxxxxxxxxx
> Roy Sigurd Karlsbakk, MCSE, MCNE, CLS, LCA
> Computers are like air conditioners.
> They stop working when you open Windows.