Wanted to give a few more details about the hardware. Server 1 Poweredge R720xd 2x E5-2665 128GB 1600MHz Ram Perc H710p 2x 300GB - 6Gb SAS - 10k for OS - Raid 1 - Adaptive Read Ahead - Write Back - 64k Stripe Size 12x 1TB - 6Gb NL-SAS - 7.2k for VMs - Raid 0 - No Read Ahead - Write Back - 256k Strip...

Build 6.2.9200

Server 1
Server 2
These servers have 128GB and 96GB respectivly. The cluster is not fully loaded yet, I still have my heavy load VMs running on stand alone until I can resolve this performance issue.

And while I am thinking about it, What is Starwinds position on Cluster Aware Updating.

It seems feasible to me that the updates on the second server could finish and it reboot prior to the resync from the first server rebooting.

We had that issue, not exactly sure what the cause was, but we performed the following steps.

On Every NIC
1. Firmware update
2. Driver Update
3. Verify all advanced settings (Offload and such)

Get this sorted out before you go into production as it caused VM corruption for us.

1. Its installed, Is there anything required to "enable" it?

2. 2GB on that drive.

anton (staff) wrote:1) Do you have loopback acceleration enabled?

2) How much of the write-back cache do you use?

I am having trouble with a cluster. Please see image below. starwind.jpg The test on the left is running from the raw disk. The one on the right is a HA Image. The cluster is 2 node Windows 2012 (fully patched) with Native SAN 6.0.5587 with the following hardware. Setup per the "Configuring HA ...