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***Please Note: It is required that the Unit be connected to a Port Multiplier compatible eSATA Host Controller for the System to see all drives. It is assumed that the driver for the eSATA Host Cotroller is correctly installed.***

The 4X1 eSATA/USB Hardware Port Multiplier (HPM) is the first in Addonics HPM family with an integrated RAID controller for superior read/write performance. This 4X1 HPM can connect up to 4 SATA / SATA II hard drives to a host via a single SATA port or USB port. The 4 connected drives can be easily set to different RAID configurations by dialing an onboard rotary switch. There is no installation of driver or any software required, thus making the addition of RAID storage to any system simple no matter what the Operating System.

The RAID volume, once created, appears to any OS as another hard drive. It can be used as a boot drive in application servers or mission critical equipment. The flexibility and performance of this 4X1 HPM make it the ideal equipment in high capacity storage applications such as video storage, data archiving, home entertainment or multi-Tera bytes storage farm.

The 4X1 eSATA/USB HPM comes in choice of the system version or the enclosure version. The system version enables multiple hard drives inside a system to be connected together to form a RAID volume. The enclosure version fits perfectly into the Addonics family of Storage Tower, Storage Rack and many standard multi-bay enclosures with standard SCSI-1 connector cut out. The 4 hard drives inside the drive enclosure, connecting to this HPM, can form a high performance and reliable external RAID system that can be attached to any computer via high speed eSATA or USB 2.0 ports.

4X1 eSATA/USB Hardware Port Multiplier can be installed onto a standard PCI slot with optional PCI Converter Bracket (PCISCBKT),
allowing any desktop PC case to be used as a hard drive storage farm.


Product Features

  • Connect up to 4 SATA I/II hard drives to computer via eSATA or USB port
  • Compatible with CF memory card or Micro Drive using Addonics SATA CF adapters (ADSAHDCF or AD2SAHDCF)
  • Compatible with any SATA controller (RAID or non RAID) or USB port
  • Integrated hardware RAID controller to maximize performance
  • Supports FAST2 (2 drive RAID0 Striping), FAST4 (4 drive RAID0 Striping), SAFE2 (RAID1 Mirroring), SAFE FAST (Mirrored Striped), BIG 2 (2 drive Concatenation), BIG 4(4 drive Concatenation), RAID 5 over 4 drives, or RAID 5+S using built-in hardware RAID
  • RAID configuration via rotary switch, no software required
  • RAID volume can be used as a boot drive or as additional storage
  • Multiple units can be daisy chainned
  • System version mounts in any standard height or low profile PCI slot
  • Enclosure version designed to fit Addonics Storage Tower, Mini Storage Tower, Storage RAck or multi-bay drive enclosure with SCSI-1 (Centronic 50-pin) back panel
  • Support hot swap
  • Onboard LED for PM health, eSATA, USB connection and for RAID diagnostic
  • Multi-function LED Pin Headers for Host link, RAID status, individual drive activity, power, system ready and RAID diagnostic
  • OS independent: DOS, All Windows, Mac OS X, Linux kernel 2.6 and above, Solaris 10 and above
  • Firmware upgradable
1, drives connected to this PM cannot be configured as independent drive. All connected drives must be configured as 1 RAID volume.
2. BIG2 and BIG4 are capable of combining drives of different capacities, but the total combined capacity is limited to the number of drives multiplied by the capacity of the smallest drive.


  • 4 internal SATA port for SATA / SATAII storage device
  • SATA connector for host connection on system model
  • eSATA connector for host connection on enclosure model
  • Shielded and durable eSATA connector eSATA port for host connection on enclosure model
  • 1 USB type B connector and 1 5-pin header USB connector for host connection
  • Onboard LED for PM health, eSATA, USB connection and for RAID diagnostic
  • LED Pin Headers for Host, 4 SATA devices, RAID status, Power On & System Ready, and RAID diagnostic
  • Auto-negotiation support for 1.5Gbps and 3.0Gbps SATA
  • Compliant with SATA II external specification
  • Integrated hardware RAID controller supporting
    • Disk striping with distributed parity over 3 drives + spard (RAID 5 + sS)
    • Disk striping with distributed parity over 4 drives (RAID 5)
    • Disk striping (RAID 0) for maximum performance
    • Disk striping with mirroring (RAID 10)
    • Disk spanning for large capacity single volume
  • Support for hot spare disk
  • Support Hot-swapping
  • Hardware RAID rebuild engine (up to HDD transfer rate)
  • Sustained transfer rates in excess of 240Mbytes/s (limited only by HDD or interface transfer rates)
  • USB mass-storage class compliant
  • 48 GPIO (24 dedicated, 24 multiplexed)
  • Maximum power consumption ~ 1 Watt
  • Control board dimension (W x D x H) - 3.4 x 2.2 x .9 in. (85mm x 55mm x 23mm)
  • Weight: 1.2 oz or 33g (without the mounting bracket)
  • Operating temperature range: 0 C to +70 C
  • Operating humidity range: 5% to 90%
  • Storage temperature range: -40 C to +85 C
  • Storage humidity range: 5% - 95% (non condensing)
  • 1 year warranty

Specification Sheets / Installation guides / Associated files

Warranty: 1 Year Return to Base

Full manufacturers warranty details are available at the manufacturers (Addonics) web site.

Unless otherwise specified Techbuy is normally your first point of contact for warranty related returns, further information regarding our warranty policies and consumer guarantees is available on our policies and service & support pages.

To apply for return of a product just go to our returns page.

These terms are in addition to and do not affect any terms, conditions, guarantees and warranties implied by law.

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