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The register · 79 models

Data center storage systems

Enterprise data center storage systems certified under ENERGY STAR, with their controller implementation, workload type and tested capacity per watt at idle.

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Certified models

79

Makers

17

Types

3

most are transaction

Latest certification

Aug 2026

By type

  • Transaction 58
  • Streaming 20
  • Transaction,Streaming 1

By maker

Data center storage by brand

Most capacity per watt at idle

ModelTypeImplementationReady idle
Pure Storage FlashArray//CR4TransactionScale-Up Storage2,101 GB/W
Pure Storage FlashArray//XLTransactionScale-Up Storage1,211 GB/W
Pure Storage FlashArray//XR4TransactionScale-Up Storage911 GB/W
IBM FlashSystem C200TransactionScale-Up Storage695 GB/W
HPE Alletra 9060 2N/4NTransactionScale-Up Storage650 GB/W
HPE Alletra 9080 2N/4NTransactionScale-Up Storage554 GB/W
Pure Storage FlashArray//RC20TransactionScale-Up Storage481 GB/W
IBM FlashSystem 5200TransactionScale-Up Storage438 GB/W
NetApp AFF A800TransactionScale-Out Storage425 GB/W
NetApp EF300TransactionScale-Up Storage422 GB/W
Lenovo (United States) Inc. DE6400F/DE6400HTransactionScale-Up Storage422 GB/W
Lenovo (United States) Inc. DE4000HTransactionScale-Up Storage420 GB/W
IBM FlashSystem 5300TransactionScale-Up Storage398 GB/W
HPE Primera C630 2NTransactionScale-Up Storage162 GB/W
NetApp EF600TransactionScale-Up Storage158 GB/W

New

Most recently certified

ModelTypeImplementationReady idle
HUAWEI OceanStor Dorado 8000TransactionScale-Out Storage59.2 GB/W
HUAWEI OceanStor Dorado 18000TransactionScale-Out Storage41.1 GB/W
HUAWEI OceanStor Dorado 6000TransactionScale-Out Storage93.3 GB/W
HUAWEI OceanStor Dorado 5000TransactionScale-Out Storage41.1 GB/W
NetApp, Inc. EF50TransactionScale-Out Storage0.05 GB/W
HUAWEI OceanStor Dorado 3000TransactionScale-Out Storage36.6 GB/W
NetApp AFF A20TransactionScale-Out Storage0.17 GB/W
IBM FlashSystem C200TransactionScale-Up Storage695 GB/W
NetApp AFF A30TransactionScale-Out Storage0.17 GB/W
NetApp AFF A50TransactionScale-Out Storage-
Pure Storage FlashArray//XLR5TransactionScale-Up Storage0.63 GB/W
Pure Storage FlashArray//XR5TransactionScale-Up Storage1.33 GB/W
Pure Storage FlashArray//CR5TransactionScale-Up Storage1.34 GB/W
DELL ME5012StreamingScale-Up Storage-
DELL ME5024StreamingScale-Up Storage-

Source: ENERGY STAR certified data center storage data, US EPA, models listed for the US market. Data build 2026-09-29. Methodology.