[Linux-PowerEdge] MD3000 preferred path not working

Jens_Heinz at Dell.com Jens_Heinz at Dell.com
Thu Jul 18 06:02:16 CDT 2013


I just realized the link points to my own article, that's why I wanted to add one thing. 
Everything in the article is still true & valid in regards of MD3000, but for our MD32xx or MD36xx systems situation changed dramatically. 

Jens  

-----Original Message-----
From: linux-poweredge-bounces-Lists On Behalf Of G.Bakalarski at icm.edu.pl
Sent: 18 July 2013 12:47
To: Nick Lunt
Cc: Steve Wilkes; linux-poweredge-Lists
Subject: Re: [Linux-PowerEdge] MD3000 preferred path not working

Hi

BTW. what is your server setup? Windows/Linux/Xenserver/VMWare???

This may also mean that your server uses wrong path ...

Have you read this thread:

http://permalink.gmane.org/gmane.linux.hardware.dell.poweredge/40180

?

Maybe sas cabling is not as expected ? Or SAS HBAs not working ?

G
>
> No, not 1000000% sure the array hardware is OK, but MDSM (and Dell) 
> say it is.
>
> 2 x SAS 5/E dual port cards.
>
> Md3000 + 3 MD1000's attached.
>
> Both SAS cards have firmware 00.10.51.00.06.12.05.00
>
> The whole lot has been bounced many times over the past week.
>
> I can't imagine how a disk replacement can lead to all this either, 
> it's a complete mess.
>
> Nick .
>
>
> [image: Nick Lunt | Applications DBA Patech Solutions Limited Tame 
> House, Wellington Crescent, Fradley Park, Lichfield, WS13 8RZ T:: 
> +44(0)1543 444
> 707 | M:: +44(0)7554 003 634 E:: Nick.Lunt at Patech-Solutions.com W::
> http://www.patech-solutions.com]
>
>
> On 18 July 2013 10:59, <G.Bakalarski at icm.edu.pl> wrote:
>
>> Hi
>>
>> Are you 10000000% sure all diskarray hardware is OK ???
>>
>> And what SAS cards - server HBA or diskarray controllers ???
>>
>> Is it single box diskarray or you have expansion enclosures???
>>
>> Single/dual controller ???? (if there are expansions: single/dual 
>> pathed
>> expansions????)
>>
>> If dual controller (in case you replaced any) : are controllers' 
>> firmwares identical?
>>
>> Did you power off/on all componets ?
>>
>> I can't imagine how regular disk exchange can make such disaster 
>> nowadays :(
>>
>> G.
>>
>> >
>> > we had a disk fail in an MD3000 last week which was replaced under 
>> > warranty. However, during the replacement of the disk something 
>> > happened and we ended up getting 2 new SAS cards, MD3000 
>> > controllers and a new backplane for the MD3000. This took a week to fix costing us thousands.
>> >
>> > Now were just about back online, but we are getting these errors 
>> > from the
>> > MD3000:
>> >
>> > Summary
>> > Node ID: WFSC_NON_PROD_SAS
>> > Host IP Address: 10.69.0.21
>> > Host ID: fintestdb.wales.nhs.uk
>> > Event Error Code: 4011
>> > Event occurred: Jul 18, 2013 9:51:43 AM Event Message: Virtual Disk 
>> > not on preferred path due to AVT/RDAC
>> failover
>> > Component type: RAID Controller Module Component location: RAID 
>> > Controller Module in slot 0 Priority:Critical
>> >
>> > The only way we seem to be able to stop getting these error 
>> > messages is
>> to
>> > set the preferred path to path 0 for all luns.
>> >
>> > Now, we have the exact same setup on another server, but using the
>> correct
>> > preferred paths and we are having none of these issues. Both these
>> servers
>> > have the same OS and MD3000 setup.
>> >
>> > Could anyone please shed some light on why the server that's just 
>> > been 'fixed' is generating these errors unless we assign all luns to path 0?
>> >
>> > Thanks
>> > Nick .
>> > _______________________________________________
>> > Linux-PowerEdge mailing list
>> > Linux-PowerEdge at dell.com
>> > https://lists.us.dell.com/mailman/listinfo/linux-poweredge
>> >
>>
>>
>>
>


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