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Bad disk performance - VS2005 R2 SP1

Source: microsoft.public.virtualserver
Sent: 10/13/2008
From: "Chris" <(email address - cut out)>
Message:

We are having really bad disk performance on our VS Guest

Host DL380 G4 3GB RAM
2 x 36GB Raid 1 for OS
2 x HBA, SAN Attached VRAID5 LUN for Guests.
2 x 1GB NIC, Teamed 2GB Total

Currently have 1 Guest. 5 Virtual SCSI Adapters (Shared Bus for Clustering)
5 SCSI attahced Fixed size VHD (Size varies from 60GB to 500GB) All reside
on SAN.

The disk write time is awful. Disk write time to Host disks is fine

Anything else attached to Same SAN has no performance issues at all

I really have no idea why or where to start looking. so any ideas would be
great.

Post Reply | This is Spam! | Mark as Spam

Related Messages

Re: Bad disk performance - VS2005 R2 SP1

Sent: 10/14/2008
From: "Ryan Sokolowski [MVP]" <(email address - cut out)>
Message:

Did this behavior just appear or has it always been this result?

--
Ryan Sokolowski
MVP - Clustering
MCT, MCITP x3, MCTS x7, MCSE x2, CCNA, CCDA, BCFP

"Chris" <(email address - cut out)> wrote in message
news:(email address - cut out)...

Show quoted text

> We are having really bad disk performance on our VS Guest
>
> Host DL380 G4 3GB RAM
> 2 x 36GB Raid 1 for OS
> 2 x HBA, SAN Attached VRAID5 LUN for Guests.
> 2 x 1GB NIC, Teamed 2GB Total
>
> Currently have 1 Guest. 5 Virtual SCSI Adapters (Shared Bus for
> Clustering)
> 5 SCSI attahced Fixed size VHD (Size varies from 60GB to 500GB) All reside
> on SAN.
>
> The disk write time is awful. Disk write time to Host disks is fine
>
> Anything else attached to Same SAN has no performance issues at all
>
> I really have no idea why or where to start looking. so any ideas would be
> great.
>

Re: Bad disk performance - VS2005 R2 SP1

Sent: 10/16/2008
From: "Chris" <(email address - cut out)>
Message:

really strange as i created a replica and it works fine. this weekend i plan
to recreate it and see how i go.

"Ryan Sokolowski [MVP]" <(email address - cut out)> wrote in message
news:(email address - cut out)...

Show quoted text

> Did this behavior just appear or has it always been this result?
>
> --
> Ryan Sokolowski
> MVP - Clustering
> MCT, MCITP x3, MCTS x7, MCSE x2, CCNA, CCDA, BCFP
>
>
> "Chris" <(email address - cut out)> wrote in message
> news:(email address - cut out)...
>> We are having really bad disk performance on our VS Guest
>>
>> Host DL380 G4 3GB RAM
>> 2 x 36GB Raid 1 for OS
>> 2 x HBA, SAN Attached VRAID5 LUN for Guests.
>> 2 x 1GB NIC, Teamed 2GB Total
>>
>> Currently have 1 Guest. 5 Virtual SCSI Adapters (Shared Bus for
>> Clustering)
>> 5 SCSI attahced Fixed size VHD (Size varies from 60GB to 500GB) All
>> reside on SAN.
>>
>> The disk write time is awful. Disk write time to Host disks is fine
>>
>> Anything else attached to Same SAN has no performance issues at all
>>
>> I really have no idea why or where to start looking. so any ideas would
>> be great.
>>
>

Post Reply | This is Spam! | Mark as Spam

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