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

Dan Yasny dyasny at gmail.com
Thu Mar 14 05:01:40 CDT 2013


Yeah, RHEL4 and the earlier versions of 5 didn't have an RDAC driver IIRC.
In any case, it works great now, no reason to clutter the system with
external software


On Thu, Mar 14, 2013 at 11:56 AM, Nick Lunt
<nick.lunt at patech-solutions.com>wrote:

> 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]
>>>>>
>>>>> _______________________________________________
>>>>> Linux-PowerEdge mailing list
>>>>> Linux-PowerEdge at dell.com
>>>>> https://lists.us.dell.com/mailman/listinfo/linux-poweredge
>>>>>
>>>>>
>>>>
>>>
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>>
>
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