On Saturday, April 09, 2011 09:14 PM, Drew wrote: >> cheap scsi raid? good luck. maybe something on ebay, but then its >> Caveat Emptor, and likely the raid batteries will be dead or dying. >> >> What speed is your scsi backplane? you can't get Ultra/320 speeds >> across older backplanes that were designed for U80 or U160 speeds. in >> fact, I've had a few backplanes that were supposed to be U320 but only >> worked reliably at U160 speeds, would get SCSI protocol errors when >> pushed under high IO loads at U320. 64bit 33Mhz PCI will sustain >> about 200MB/sec, which is about all you can get out of a single channel >> of U160 or slower SCSI anyways. > > In that case there's no real point upgrading. :-) The drives are U160's. The key is the backplane, not the drives. You should be able to get u320 speeds if you have enough u160 drives. > > I was just hoping a slightly newer card might be available that'd give > me a speed boost for cheap. :-) > > Again, like John posted, it depends on whether your backplane(s) can feed the u320 card and whether its bus can take the bandwidth.