Re: [linux-lvm] pvcreate issues

[Arshavir Grigorian <ag@m-cam.com>]

Henrik Morsing wrote:
>>AJ Lewis wrote:
>>
>>>On Mon, May 23, 2005 at 02:48:11PM -0400, Arshavir Grigorian wrote:
>>>
>>>
>>>You're sure sd[c-f] is not the same device on multiple paths?
>>>
>>
>>How can I be sure? How do I check?
>>
>>This SAN exports another set of 4 LUNs to a different server and they
>>work just fine.
> 
> 
> It does look like you're seing the same disk through four different paths.
> What OS is the other server running? The people that setup the SAN should
> know if it is multi pathed or not.
> 

Thanks.

Looks like it might be a problem with the type of firmware we have on 
the SAN which only allows for one active fiber channel controller at a 
time. The second controller should be used only when the first one 
fails. What we were doing was to export the first set of 4 volumes 
through one controller and another set of 4 on the other controller, 
hence the problem. We will either have to change the firmware to allow 
for 2 active controllers (no failover spare) or buy a switch to make all 
the volumes accessible to more than one server through the first fc 
controller.

-- 
Arshavir Grigorian
Systems Administrator/Engineer