An Initiator is the storage device/endpoint that initiates SCSI request. Typically, Initiator serves the same purpose what SCSI adapter does. The only difference is, instead of physically cabling SCSI devices (like HDD, Tape Drives), an SCSI initiator send SCSI commands over an IP/Fiber Channel network.
A VMware Virtual Switch is Layer-2 Switch embedded in VMkernel itself. It’s a software switch runs under the control of the ESXi Hypervisor and responsible for providing all network-based communications with and within an ESXi Host System.
Below mentioned Out of 4 Scenarios, which all scenarios depicts correct IO path in vSphere Networking.
Pluggable storage architecture was one of the major enhancement done by VMware to provide two key functions of the storage component in vSphere world.
• Multipathing: If there are multiple paths, which paths should be used for given I/O
• Failover: When a path goes down, I/O should failover to alternative path automatically.
Find out flaws in above mentioned diagram to achieve VM’s high availablity. Re-draw correct design to meet customer requirements of making storage design highly available.