[Linux-PowerEdge] Fault Tolerant disk arrays and device-mapper-multipath

Nick Lunt nick.lunt at patech-solutions.com
Thu Mar 14 04:56:05 CDT 2013


Yes Dell used to supply a proprietary driver but they have now switched to
using the linux multipath. That's my understanding anyway.


[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 14 March 2013 09:50, Dan Yasny <dyasny at gmail.com> wrote:

> You might want to see if the Dell provided software is a better match, but
> I haven't touched it in years
>
>
> On Thu, Mar 14, 2013 at 11:47 AM, Nick Lunt <
> nick.lunt at patech-solutions.com> wrote:
>
>>
>> Hi Dan
>>
>> yes it makes sense to me too. Reading the multipath docs for RH6 it seems
>> it's also easier to setup now than it has been previously.
>>
>> Thanks for your help.
>>
>> 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 14 March 2013 09:39, Dan Yasny <dyasny at gmail.com> wrote:
>>
>>> With four paths in place, device-mapper absolutely makes sense to use.
>>> Haven't touched the newer MDs in a SAS configuration (I mostly use iSCSI),
>>> but I think they will work the same way - using scsi_dh_rdac
>>>
>>>
>>> Dan
>>>
>>>
>>> On Thu, Mar 14, 2013 at 11:37 AM, Nick Lunt <
>>> nick.lunt at patech-solutions.com> wrote:
>>>
>>>> Hi
>>>>
>>>> we are purchasing an R910 which we will install Oracle Linux 6 on. The
>>>> server will have 4 x SAS HBA cards which will connect to an MD3220, this in
>>>> turn will be daisy chained to 3 x MD1220 and an MD1200.
>>>>
>>>> We will be setting these up in a fault tolerant configuration.
>>>>
>>>> My question is with this configuration is it necessary to also setup
>>>> device-mapper-multipath ?
>>>>
>>>> Thanks
>>>> 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]
>>>>
>>>> _______________________________________________
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>>>> Linux-PowerEdge at dell.com
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>>>>
>>>>
>>>
>>
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>
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