ESXi and Nimble Storage Unmap SCSI Blocks

OverView Back in vSphere 5 a new VAAI primitive called unmap was released. When using thin provisioned volumes or LUNs for VMFS datastores, actions such as storage vMotion, consolidating snapshots and deleting data (such as VMDK files) do not automatically reclaim the space on the underlying datastore. For example, if you have a thin provisioned… Read More »

VMWare SRM Duplicate initiator ‘’ found in SRA’s ‘discoverDevices’ response.

When setting up VMWare SRM 6.1 with array based replication, I was seeing an error after adding the array managers into SRM. The error was Duplicate initiator ‘’ found in SRA’s ‘discoverDevices’ response. In the vmware-dr-xxx.log file found in C:\ProgramData\VMware\VMware vCenter Site Recovery Manager\Logs there was a tiny bit more info: 2016-01-13T09:39:10.757+11:00 [03508 info ‘DrTask’ opID=5cacf7dd]… Read More »