MegaRAID Slow Performance

[Aleksandar Milivojevic]

Aleksandar Milivojevic wrote:
> Many 64-bit cards will also work in 32-bit slot.

Oh, one thing I forgot to tell you.  Since there will be part of the 
connector (that extra lines needed for 64-bit operation) "hanging" above 
the motherboard when you plug 64-bit card into 32-bit slot, check that 
there's room for it (vertically).  I've seen motherboards where it was 
not possible to plug 64-bit card simply because various connectors, 
capacitors, chips in high sockets, or whatever were blocking that space. 
  There must be some free space (aprox 1 3/4" in length) in front of the 
connector.  Low-height chips are OK, they will leave enough space for 
the card's 64-bit part of the connector.  Anything higher, and you won't 
be able to insert the card.  Most recent motherboards are designed with 
this in mind, and have no obstructive elements in front of PCI slots 
(only low height chips, which are OK), or such elements are aligned with 
in-between-slots space.  Some older and/or poorly designed motherboards 
might have capacitors, connectors or other junk exactly alligned and 
just infront of the PCI slot(s).  Actually, I saw one rather recent 
Intel mobo with exactly that problem (some stupid diod that could have 
easilly be placed a bit to the side, making one of the PCI slots 
unusable for 64bit cards, sigh).

-- 
Aleksandar Milivojevic <amilivojevic at pbl.ca>    Pollard Banknote Limited
Systems Administrator                           1499 Buffalo Place
Tel: (204) 474-2323 ext 276                     Winnipeg, MB  R3T 1L7