At 20:52 +0800 13/9/07, Feizhou wrote: >Well, the first thing I noted was that the H8DA8 was not on the list >of compatible motherboards on the 3ware website. I challenged the vendor about that quite early on and was told that they've used this combo before with no trouble, though I've yet to press them on this point - but yes, that's a possibility I've not ruled out. The card's running the latest firmware that I know about, certainly the fw in codeset 22.214.171.124 is the version intended to go with the driver supplied in CentOS 4.5. It's definitely in the right slot, not using a riser and it's running at the right speed: //serv1> /c0 show all [snip] /c0 Controller Bus Type = PCIX /c0 Controller Bus Width = 64 bits /c0 Controller Bus Speed = 133 Mhz I'll see if there's a motherboard BIOS update, thanks for the reminder on that. If there is anyone on the list using a 9550SX with an H8DA8 could they let me know whether or not they're seeing anything similar to what I've described? Thanks S.