Description
Storage configuration in a VMware virtual environment involves the VMware vmdk and the RDM disks that reside on a shared datastore. To access the disks, a virtual machine uses virtual SCSI controllers that can have None, Physical, or Virtual type of Bus Sharing configuration.
Depending on the type of SCSI controller and the Bus Sharing configuration, virtual machines that are configured on same or different hosts can simultaneously access the same virtual disk.
To address the type of clustered-environment you have configured, you can adjust the Bus Sharing configuration set and enable or disable the Multi-writer protection.
What type of Bus Sharing configuration does InfoScale support to leverage VMware vMotion?
To leverage VMware vMotion, InfoScale supports cluster configuration with pRDM disks that have None or Physical type of Bus Sharing configuration.
The following table provides the supported Bus Sharing configurations with respect to the corresponding ESX host version and the type of disks used.
| ESX host version | Disk type | Bus Sharing configuration | Notes |
| ESXi 6.5 U3 | pRDM | Physical | vMotion supported if Multi-Writer flag is disabled. RDM-P Disks Flag: Perennially-Reserved. DRS Rules configured for VMs in the same cluster cannot run on same ESXi host |
ESXi 6.7 |
pRDM | Physical | vMotion supported if Multi-Writer flag is disabled. |
| ESXi 7 | pRDM | Physical | vMotion supported if Multi-Writer flag is disabled. RDM-P Disks Flag: Perennially-Reserved. DRS Rules configured for VMs in the same cluster cannot run on same ESXi host |
| ESXi 7 U1/2a | pRDM | Physical | vMotion supported if Multi-Writer flag is disabled. RDM-P Disks Flag: Perennially-Reserved. DRS Rules configured for VMs in the same cluster cannot run on same ESXi host |
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