[nylug-talk] Changing the configuration of a PCI card

[Chris Knadle]

On Wednesday 16 January 2008, Luis Murillo wrote:
> I have two identical servers and the only difference between the
> configuration on each of them is that when I run lspci to see the SCSI
> controller card I have a control setting that is different. Now is
> there a possibility of changing this setting?
>
> I run lspci on one server and I get:
>
> 06:02.1 SCSI storage controller: Adaptec AHA-3960D / AIC-7899A U160/m (rev
> 01) Subsystem: Compaq Computer Corporation Compaq 64-Bit/66MHz Dual Channel
> Wide Ultra3 SCSI Adapter
>             Control: I/O+
<snip>
> 06:02.1 SCSI storage controller: Adaptec AHA-3960D / AIC-7899A U160/m (rev
> 01) Subsystem: Compaq Computer Corporation Compaq 64-Bit/66MHz Dual Channel
> Wide Ultra3 SCSI Adapter
>             Control: I/O-
<snip>
> Now the difference between them is in the Control parameter, where in
> one I/O has a plus and on the other one it has a minus. Is there a way
> to change this setting? This is a RedHat box.

   Since this is likely to be specific to the Linux driver for the device, I 
suggest reading the documentation for the driver, which in this case is the 
aic7xxx driver.  So have a look in the Linux source code documentation at 
Linux-<version>/Documentation/scsi/aic7xxx.txt.  There are a whole bunch of 
options for that driver.  I don't know which of them might change the I/O +/- 
setting.

   -- Chris

-- 

Chris Knadle
Chris.Knadle at coredump.us