[Linux-PowerEdge] MD3000 preferred path not working

G.Bakalarski at icm.edu.pl G.Bakalarski at icm.edu.pl
Thu Jul 18 06:11:15 CDT 2013


> I just realized the link points to my own article,

;-) :-O

> 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.
>
I didn't know that. I use MD3620F and multipathing with rdac works fine ...
Especially with newer multipath-tools (0.4.9 + )

GB

> -----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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