Re: Disks take long time to bring online if failover

Tech Tip: Click here to run a free scan for Windows Errors and optimize PC performance

To summary:

1. The registry key as you suggested:
2. I could see the physical disk from Powerpath and from Windows device
manager, so the SAN should be fine
3. The small disk-- qurom disk could bring online very quick (something less
than 30s)
4. The larger cluster disks (each around 2TB) take long time to bring
online, it was fine when they were empty (no data)


Regards

George



"John Toner [MVP]" <jtoner@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:eZnQvlTkFHA.2916@xxxxxxxxxxxxxxxxxxxxxxx
> Are you using PowerPath on the hosts? If so, try changing the following
> registry key:
>
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EmcpBase\Parameters
>
> Add/Change the "MpPagingIoTimeout"=dword:00000000
>
> Regards,
> John
>
> "George He" <georgeh@xxxxxxxxxxxx> wrote in message
> news:uEFiIIOkFHA.576@xxxxxxxxxxxxxxxxxxxxxxx
>> Hello,
>>
>> I have a Windows 2003 SP1 two nodes cluster attach to an EMC CX500 SAN.
> They
>> have 7 physical disks which are presented by SAN. the cluster was fine
>> before we migrate data to the cluster. e.g. failover without any
>> problems.
>> Now, with 7TB data on the SAN, if we failover from one node to another
> node,
>> the physical disk resource take around 10 to 15 minutes to bring online.
>>
>> Anyone has any ideas on why it behaviours like this? I suspect it is
> because
>> there are so many data on these disks.
>>
>>
>> Thanks
>>
>> George
>>
>>
>
>


.

Relevant Pages

  • Re: Exchange 2003 cluster and physical disk
    ... Our SAN team has decided that they need to reconfigure the SAN for the log ... that the physical disk resource will still be seen, etc. and I will be able ... attendant resource and then recreate it to bring in the configuration from ...
    (microsoft.public.exchange.setup)
  • Re: two SAN boxes?
    ... A LUN is a virtual disk on the SAN ... but maps as a physical disk on the OS side. ...
    (microsoft.public.sqlserver.clustering)
  • Re: Your thoughts on a print cluster.
    ... It currently wont show any local disks to choose from but im guessing thats ... because they are all in a RAID and show up as one physical disk to the OS. ... If it comes down to it, whats the cheapest way i can setup a SAN? ... >> well i dont really have a whole lot of choices because i dont have a SAN ...
    (microsoft.public.windows.server.clustering)