pci powerstate related: aac(4) broken on Perc 3/Di on -CURRENT

[Wilkinson, Alex]

    0n Thu, Jan 06, 2005 at 03:58:39PM -0700, Scott Long wrote: 

    
    >It should be noted that WinXP tried to get fancy in a similar way with
    >automatic powerdown of devices, and broke these PERC devices in a
    >similar way.  Due to restrictions of the MS driver framework, the only
    >solution that Adaptec could use was to modify the firmware to make the
    >bridge be opaque.  This solved the issue of the OS seeing devices that
    >belong to the firmware, but made it impossible to run the controller in
    >split-channel mode, where one channel is for RAID and the other channel
    >is pure SCSI.  

  
Scott, what is meant by "...to make the bridge be opaque." ?

 - aW