Gartner Research

Market Definitions and Methodology: External Storage Systems

Published: 23 January 2018

ID: G00349670

Analyst(s): Robert Preston , Suzie Low , Roger W. Cox , Andrew H Kim , John Monroe


This document contains Gartner's definitions for external storage systems, including external controller-based storage and just-a-bunch-of-disks systems. Technology strategic planners should use this as a companion document for Market Share and Forecast reports.

Table Of Contents

What You Need to Know


Notable Changes


  • How Vendor Revenue Is Estimated for Each Vendor Named in Gartner Market Share Reports
  • Gartner Vendor Revenue Profile
  • Forecast Methodology Overview


  • Exchange Rates
  • Exclusions

High-Level Definitions and Segmentation

  • Market Share External Storage System Segmentation
    • Vendor Segmentation
    • Other Vendors
  • Product Type/Purpose
    • General-Purpose Block and File Disk/Hybrid
    • Disk-Based Backup Storage Systems
    • Object Storage (Disk-Based Archival Storage Systems)
    • Just a Bunch of Disks
    • Solid-State Storage Arrays
    • ECB Storage Segmentation by Data Access Protocol
  • Storage DAP 1
    • Block
    • File
    • Object
    • JBOD
    • Unified
  • Storage DAP 2
    • DAS
    • SAN
    • NAS
    • Object (Object) — DAP 2
    • JBOD
    • Unified — DAP 2
  • Storage DAP 3
    • FC DAS
    • Other DAS
    • SAS DAS
    • FC SAN (Block)
    • iSCSI SAN (Block)
    • Mainframe SAN
    • NAS Gateway (File)
    • NAS Stand-Alone (File)
    • Object (Object) — DAP 3
    • JBOD
    • Unified — DAP 3
  • ECB Storage Segmentation by Architecture
  • Forecast External Storage System Segmentation
  • Regional Definitions

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