Technical specifications





IBM Power 5148-22L (2) storage servers
IBM Power 5148-21L ESS management server (one per installation)


10GbE, 40GbE, 100GbE Ethernet
FDR, EDR InfiniBand

10GbE, 40GbE, 100GbE Ethernet
FDR, EDR InfiniBand

Storage units

IBM 5147-024 2U JBOFs

Operating system (OS)

Red Hat Enterprise Linux (RHEL) Little Endian

Cluster management software

IBM Spectrum Scale for ESS (5765-ESS), xCat

Number of JBODs

1, 2 or 4 2U, 24 drive 2.5-inch solid state drives (SSDs)

2, 4 or 6 5U, 84 drive 3.5-inch hard disk drives (HDDs)

Drive capacity

4 TB or 15 TB SSDs

4 TB, 8 TB or 10 TB nearline-SAS HDDs

Maximum number of drives

96 SSDs

502 HDDs

Maximum usable capacity per ESS
IBM Spectrum Scale can scale to 2^99 bytes and over 9000 nodes

1.0 PB usable

3.7 PB usable

Supported RAID levels

RAID-1 (8+2P) or (8+3P) with IBM declustered RAID technology


See SPEC SFS 2014 version results:

Rack cabinets

42U rack cabinet

2,020 mm H x 640 mm W x 1,100 mm D (79.5 in. H x 25.2 in. W x 43.3 in. D); 261 kg (574.2 lb)


IBM Ultra Density Enterprise 60A/208V/3ph (US)


IBM Elastic Storage Server scales in a building block approach – capacity, bandwidth and the single namespace increases as more building blocks are added to scale out the entire solution. If the solution is sold as standalone, the POWER8 processor-based IBM Elastic Storage Server management server will act as the quorum node.


  • IBM Elastic Storage Server hardware installation is included at no charge.
  • IBM Lab Services is available for customer configuration and enablement support.


3-year parts, customer-replaceable unit (CRU) or on-site labour, limited warranty, with individual nodes retaining the warranty and service upgrade offerings for that IBM machine type; optional warranty service upgrades. Support is 09:00 to 17:00, next business day. Optional warranty service upgrades to 24x7.

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