Re: [dm-devel] multipathing Sun 6140

[Chandra Seetharaman <sekharan us ibm com>]

On Wed, 2008-06-04 at 17:14 -0400, Gustavo Riveros wrote:
> Hi dm-developers,
> 
> I'm having problem with multipathing device-mapper with my linux server, 
> but this was resolved by Thread "multipathing flip flopping on Sun 6140" 
> very well 
> (http://www.redhat.com/archives/dm-devel/2007-August/msg00066.html)
> 
> The configuration is the same:
> 
> X4600 Server
> 2 HBA's Emulex
> SAN STK6140
> 
> but in dmesg i have the following error message:
> 
> Buffer I/0 error on device sdf, logical block 0
> end_request: I/0 error, dev sdf, sector 0
> 
> Did you know the error message?

This is the error message that is printed when the lun is accesses thru
the passive paths. These are _not_ a problem.

They will not appear if all the access to the luns are thru the dm
devices (in which case you will see these only during device probing
time.

I am pushing a set of patches (currently in -mm, and hopefully will get
into 2.6.27) that will get rid of these messages.

> 
> Thanks,
> Gustavo Riveros
> 
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