The mobo I'm using in this setup allows downshifting PCI-X slots to 100 and 66 Mhz. Alas, it's in production now and I'm not able to test those configurations. Kirk Bocek Michael Kress wrote: > Kirk Bocek wrote: >> 3Ware's site advertises 300MB/Sec writes using 8 disks on the PCI >> Express version of this card (the 9580 I think.) I'm guessing 4x PCI >> Express has more bandwidth but 133Mhz 64-bit PCI-X is no slouch. The >> only two things I need to change are to put the disks in 3GB/Sec SATA >> mode (they're in 1.5GB/Sec mode right now) and to enable memory >> interleaving on the motherboard (I only have two sticks of memory, >> this M/B needs 4 for interleaving.) But I don't think these things >> should drop me down to the write performance of a single IDE disk. > > Has somebody made experience with PCI-X-133MHz and PCI-X-66MHz? > With my board there's not much difference. I even have the feeling, that > driving a 9550SXU-4LP at PCI-X-66MHz is a bit faster than at 133. At > least bonnie++ gives me slightly faster values @ 66. > >> Does anyone have any suggestions on improving write performance? > see above. :) > > TIA - Michael >