On Thu, 19 Feb 2004 at 7:38pm, Jeff Garzik wrote > Rev. Jeffrey Paul wrote: > > I am looking at a four disk raid5 or raid10, and it seems like > > the interrupt load from four drives on four channels might be a bit > > excesive. I'm going to be running critical services on the machine > > that the drives are in (namely mysql and nfs) and don't want to worry > > about performance. > > Once your spindles can max out your PCI bus bandwidth, -then- you can > start worrying about PCI bandwidth and interrupt load ;-) With some boards, it's actually pretty easy to do that. ;) Not with 4 disks, as the OP is doing, but 8 disks on one 64bit/33MHz bus (3ware 7500-8) can start to bump up against the PCI bandwidth. I've got a couple servers with 2 3wares and 16 disks, and I need to put the 3wares on separate PCI busses to make sure I get the full speed out of the combined array (hardware RAID5, software RAID0). -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - 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
