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ATTO ExpressSAS H644 Low-Profile 6-Gigabit SAS/SATA - Internal 4-Port/External 4-Port Host Adapter - ESAS-H644-000

provide the industry's fastest SAS/SATA connectivity, integrated RAID support (R Series) and flexible port configurations. Outstanding performance with up to 6-Gb/sec per port. RoHS Compliant.   Learn more about the product
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Your Final Price:$358.99
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eCOST Part#: 7765736
Mfr Part#: ESAS-H644-000
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The ExpressSAS H644 is among ATTOs first host adapters to provide blazing-fast 6-Gb performance at 600MB/sec. per port. By utilizing a serial, point-to-point architecture, in addition to PCI Express 2.0 bus technology, ExpressSAS 6-Gb host adapters are engineered for demanding IT and digital media applications which require more performance than 3-Gb SAS/SATA can provide. The ExpressSAS H644 features four internal ports, four external ports and allows connections to 256 end-point devices.

Included with all ATTO host adapters is an easy-to-use utility enabling management, monitoring and configuration which leverages an intuitive GUI. ATTOs exclusive, field-proven Advanced Data Streaming (ADS) Technology helps users meet the most demanding performance requirements of bandwidth-intensive applications. ADS achieves this performance increase by implementing a combination of features engineered to allow for the controlled acceleration of data transfers.

Product Features:
    Blazing Fast Performance

  • Up to 6-Gb/sec per port transfer rates with SAS, SATA and SATA II attachment
  • Advanced x8 PCIe 2.0 host interface
  • Achieve I/O and data throughput necessary for advanced video (uncompressed HD, 2K and 4K film) and transactional database applications

  • Smooth Data Streaming

  • Alleviate data transfer bottlenecks and move data more efficiently while managing latency with ATTOs exclusive ADS Technology
  • Maximize data flow using the fastest available bus interconnect and bus management technology

  • One Click Installation

  • Save time with factory preset configurations for plug and play operation
  • Simplify installation, management and monitoring via included multi-platform configuration utility featuring an intuitive GUI
  • BIOS setup utility provides flexibility for custom
Technical Specifications:


  • Support for IT server and digital media workgroup solutions requiring high-bandwidth and reliability.
  • Applications include audio/video, VOD, fixed content, database and other data intensive environments.

  • Maximum Transfer Rate
  • Up to 6-Gb/sec per port

    Advanced Capabilities

  • Device support for SAS, SAS 2.0, SATA and SATA II
  • User friendly GUI for quick and easy configuration
  • Advanced management functions
  • PC BIOS bootability

  • PCI Bus Specifications
  • x8 PCI Express 2.0 host interface
  • Connectors
  • Mini SAS connectors

    Driver Support z

  • Windows Server 2003, 2008, XP, Vista
  • Mac OS X 10.4.x & 10.5.x (8 port cards only)
  • Linux (Red Hat and SuSE)
Device Type Storage controller - plug-in card - low profile
Host Bus PCIe 2.0 x8
Storage Controller
Interface SATA 3Gb/s / SAS 6Gb/s
Data Transfer Rate 600 MBps
Supported Devices Hard drive
Channel Qty 8
Max Storage Devices Qty 256
Expansion / Connectivity
Interfaces 1 x SATA 3Gb/s / SAS 6Gb/s - 26 pin 4x Shielded Mini MultiLane SAS (SFF-8088) ( external ) ¦ 1 x SATA 3Gb/s / SAS 6Gb/s - 26 pin 4x Shielded Mini MultiLane SAS (SFF-8088) ( internal )
Compatible Slots 1 x PCI Express 2.0 x8
Included Accessories Low-profile bracket
Compliant Standards FCC Class B certified, EN55024, EN55022 Class B, FCC Part 15, RoHS, EN 60950-1, IEC 60825-1
Manufacturer Warranty
Service & Support 3 years warranty
Service & Support Details Limited warranty - 3 years
Dimensions & Weight
Depth 5.6 in
Height 2.7 in
Environmental Parameters
Min Operating Temperature 32 °F
Max Operating Temperature 104 °F
Humidity Range Operating 5 - 95%
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ATTO ExpressSAS H644 Low-Profile 6-Gigabit SAS/SATA - Internal 4-Port/External 4-Port Host Adapter (ESAS-H644-000)

provide the industry's fastest SAS/SATA connectivity, integrated RAID support (R Series) and flexible port configurations. Outstanding performance with up to 6-Gb/sec per port. RoHS Compliant.

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