Byte sized for when a nibble just isn't enough!
Recently a colleague was attempting to configure the cluster extension protection (CLX) which is required by our Active/Active HPE 3PAR storage setup. Our Microsoft Failover Clusters are stretched over geographically separate sites and the Cluster Share Volumes (CSV) are spread over the 3PAR storage arrays in each site. We use the CLX software to manage … Read more
I recently ‘enjoyed’ working on an issue where a 3PAR remote copy group issue resulted in both virtual volumes entering a read-only state. I’ve seen a similar problem where both copies go into a read-write state which is probably more worrying when it happens. Let’s take a look at the problem, the data I had … Read more
I’m currently working on a case with HPE (Hewlett Packard Enterprise) 3PAR support with regard to excessive retransmit errors on our Remote Copy Fibre Channel (RCFC) connection between two 7400 arrays. While troubleshooting we found that a required option was not set appropriately – namely interrupt coalescing on the RCFC ports. In this post I … Read more
In this post we will look at deploying the HP 3PAR quorum witness – this is a vital system when running arrays with Peer Persistence synchronous replication as it allows us to arbitrate in a split brain scenario. First off what does it do and why do we care? The quorum witness is a virtual … Read more
Having deployed two instances of the HP 3PAR simulator in previous posts (on ESXi and VMware Workstation) it’s time to configure the Remote Copy over IP (RCIP) feature. In a ‘real’ 3PAR deployment Remote Copy allows a 3PAR array to copy volumes from a source to a target – this can be a 1-1 relationship … Read more
Growing a virtual volume (VV) on a 3PAR array is very easy however when using Remote Copy (RC) to replicate this volume between arrays you need to carry out the growth task slightly differently. As usual screenshots and command output may be edited to remove sensitive details. Below we have a screenshot from the HP … Read more