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1.3 – Identify and differentiate storage access protocols for vSphere (NFS, iSCSI, SAN, etc.)

Table of Contents

It is important to know that you can use several storage access protocols for your data. Below is a short summary of all the protocols vSphere v7.0 supports:

Local and network storage

  • DAS (Directly-attached Disks
  • vSAN will transform internal storage of your ESXi host into shared storage
  • NFS 3 and NFS 4.1
  • SCSI, IDE, SATA, USB, SAS, flash and NVMe are supported

Fibre Channel storage

  • High-speed network to high-performance storage devices
  • Your host will need HBA adapters (Host-Bus-Adapters)

iSCSI storage / storage devices or LUN’s

  • Hardware iSCSI will connect the host to storage via a third-party adapter
  • Software iSCSI will connect the host to storage via a software-based iSCSI initiator in the VMkernel.

Shared Serial Attached SCSI (SAS)

  • Stores virtual machines on direct-attached SAS storage systems
  • Usually network based storage

VAAI

  • APi’s that help arrays to integrate with vSphere for offloading certain storage operations to an array

vSphere API for multipathing

  • Known as Pluggable Storage Architecture (PSA) which uses APIs which allow storage partners to create and deliver multipathing and load-balancing plugins that are optimized for each array
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Leon Moris

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