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

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 SSDs

2, 4 or 6 5U, 84 drive 3.5-inch 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 labor, limited warranty, with individual nodes retaining the warranty and service upgrade offerings for that IBM machine type; optional warranty service upgrades. Support is 9x5, next business day. Optional warranty service upgrades to 24x7.