Failover support for QLogic HBAs in RHEL 4?

[Aterea Brown]

I believe that feature was removed from 2.6.xx modules  in favour of
using device mapper multipath-tools.
I believe that this is the supported path forward for linux and
multipathing.
See http://christophe.varoqui.free.fr/wiki/wakka.php?wiki=UsageFile for
more information.


-art

>>> ssklar+redhat at stanford.edu 06:47 22/09/2006 >>>
Um, if it isn't possible to do this with the native driver, then I  
guess I will have to go with additional software.

However, failover is supposed to be an available feature of the  
QLogic driver, and I shouldn't have to use anything added on.  I'm  
just trying to understand why the feature appears to be removed from  
the kernel module provided by Red Hat.

Thanks,
	-s-

On Sep 21, 2006, at 11:33 AM, Troy Knabe wrote:

> Try Sun's Traffic Manager for RHEL
>
> http://www.sun.com/products-n-solutions/hardware/docs/Software/ 
> Storage_Software/Sun_StorEdge_Traffic_Manager/index.html
>
> -Troy
>
> Sandor W. Sklar wrote:
>> I have several Sun X4100 systems (X86_64) running RHEL 4 update 4, 

>> with kernel 2.6.9-42.0.2.ELsmp.  These systems each have two  
>> QLogic QLA200-E Fibre Channel HBAs installed.  I am using the  
>> driver kernel module that comes with the kernel RPM.
>>  From everything that I've been able to read, the default behavior 

>> of the the driver is to have "failover" enabled.  Further, I  
>> should be able to force this behavior by setting the option "pts=1 

>> ql2xfailover=1".
>> Unfortunately, this isn't working.  modinfo on the qla2xxx driver  
>> does not show the ql2xfailover as an available parameter.
>> This is the version of the module I have:
>> filename:       /lib/modules/2.6.9-42.0.2.ELsmp/kernel/drivers/ 
>> scsi/qla2xxx/qla2xxx.ko
>> version:        8.01.04-d7 1036BB22AA28C8D7180B7E1
>> Am I doing something wrong, or has failover support been disabled  
>> in this module for some reason?
>> Thanks,
>> -- Sandy
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