Adding Fibre Channel array to FC

[Nigel Wade]

Mark Haney wrote:
> Okay, I'm stuck and I hope someone can help me out.  I have a FC server 
> that has 2 FC arrays already setup on it each with 2TB.  I just 
> connected up 2 more arrays each with 7.5TB and now I'm trying to figure 
> out how (if possible) I can get FC to see the arrays without rebooting 
> the server.  Is this possible? I'd prefer to get it up and running 
> without the reboot, and as I"m a newbie to FC SANS on linux, I'm at a 
> loss.  Help anyone?
> 
> 

If they are seen as separate SCSI devices, or LUNs you could try this:

to add a SCSI device, do

echo "scsi add-single-device a b c d" > /proc/scsi/scsi

where

       a == hostadapter id (first one being 0)
       b == SCSI channel on hostadapter (first one being 0)
       c == ID
       d == LUN (first one being 0)


I make absolutely no guarantee that this won't cause your server to crash and 
burn. The risk is for you to weigh against the loss of service caused by  re-boot.

Of course there are other things to take into account also. Does your fibre 
adaptor see the new devices, or does that need to be cycled in some way?

-- 
Nigel Wade, System Administrator, Space Plasma Physics Group,
             University of Leicester, Leicester, LE1 7RH, UK
E-mail :    nmw at ion.le.ac.uk
Phone :     +44 (0)116 2523548, Fax : +44 (0)116 2523555