LIP destroyed xxx active commands

[Eric Anderson]

Tom Samplonius wrote:
> 
> On Mon, 10 Apr 2006, Eric Anderson wrote:
> 
>> Tom Samplonius wrote:
>>>
>>> Eric,
>>>
>>>   It seems that isp0 is connected to a loop topology network (as 
>>> opposed to a point to point, or fabric), and something keeps 
>>> initializing the loop by sending a LIP command.
>>>
>>>   Are you plugging or unplugging things into the loop all of the 
>>> time?  Or are you loop part on a switch, and someone else is plugging 
>>> or unplugging things from the fabric?  If you are going straight into 
>>> a switch, it might be better to change the port to a fabric port 
>>> instead.
>>
>>
>> This host has it's isp device directly connected to a fiber channel 
>> array.
> 
>   Probably should use point-to-point mode instead.  See if you can 
> change the port type on the array controller.

Ok - I can do that.  If I do that, will that disrupt filesystem activity?


>> The array is not disappearing, or being rebooted, nor is there any 
>> other machine rebooting or resetting.   I see these same errors on 
>> another box that has 3 arrays connected to a qlogic switch.  I seem to 
>> only see these when the machine is heavily accessing the disks.
> 
>   Same here.  You shouldn't see LIPs on a fabric.  So the QLogic switch 
> must be trying to maintain a loop per port.
> 
>   I suspect that loop mode is also less stable than point-to-point or 
> fabric. There is an indication in the isp manpage that it is possible 
> for the driver to hang on boot waiting for a LIP.  The solution to that 
> problem has been to force a LIP (unplug something), or don't use a loop 
> mode.


What do I need to change on the qlogic switch/initiator/target ends to 
force things?

Thanks for your help!


Eric



-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
Anything that works is better than anything that doesn't.
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