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   The Astek A41606-ENC series products utilize state of the art Gen2 Serial Attached SCSI (SAS) expanders operating at 6Gbps, to provide high-density storage enclosures with industry leading performance. Based on Astek’s innovative SAS expander module, combined with a precision machined chassis, and a unique 'sled-less' disk mounting mechanism. these enclosures can hold between sixteen and twenty-four 2.5” hard disks.The A41606-ENC provides two external SAS x4 wide-port input/output connections per expander, with each wide port supporting up to 24Gbps of I/O. Each port can be connected either to a host or another A41606-ENC, allowing system designers to cascade multiple enclosures to further increase the total available storage.


   As the Astek enclosure is based on an ANSI T10 SAS 2.0 compliant bus expander, it supports direct connection of both enterprise class SAS disks and low-cost Serial ATA (SATA) disks. The expander chipset onboard transparently bridges SATA to SAS. The SAS protocol also natively supports hot-swap of disks without requiring special software. When configured with dual SAS expanders, the A41606-ENC supports both ports of true SAS disks, providing independent I/O paths from host to disk, and allowing system designers to support true redundant access for high-reliability systems.


Technical Specifications


ANSI T10 SAS specification 2.0

Data Transfer

Up to 48Gb/s to hosts


Direct-attach, cascaded attachment

Supply Voltage

120VAC (optional 48VDC power available)

Supply Power

Estimated: 20W w/o drives, up to 200W supported


Thirty-six 6Gb/s SAS/SATA ports (72 ports when configured with dual expanders)

SAS Bandwidth


Single Lane

Wide Port (2 lanes)

Wide Port (4 lanes)

Wide Port (8 lanes)



150 MB/s
300 MB/s
600 MB/s




300 MB/s
600 MB/s
1200 MB/s




300 MB/s
600 MB/s
1200 MB/s

2400 MB/s


2 SFF-8088 IPASS x4 sockets (4 SFF-8088 connectors when configured with dual expanders)

Form Factor

2U -19" rack-mount compatible (short depth)



ANSI T10 Serial Attached SCI 1.0(SAS-1)

ANSI T10 Serial Attached SCSI 2.0(SAS-2)

ANSI T10 SCSI Architectural Model 4(SAM-4)

ANSI T10 SCSI Enclosure Services(SES)

SATA 1.5Gbps

SATA 3.0Gbps

SATA 6.0Gbps

Device Support

16 target disks, SAS or SATA

Agency Approval

RoHS Compliant (lead-free)





0° to 55° C

-40° to +85° C

Relative Humidity

5 to 90% non-condensing

5 to 90% non-condensing