INTRODUCTION
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1. Introduction
This section presents a brief overview of the ARC-4038 compact tower
12Gb/s SAS JBOD enclosure.
1.1 Overview
The ARC-4038 SAS-to-SAS JBOD box provides a compact external
storage chassis capable of accommodating up to 8/12 12Gb/s Se-
rial-Attached SCSI (SAS) drives or 6Gb/s Serial ATA (SATA) drives.
The box can support both 3.5-inch disk drives and 2.5-inch disk
drives, each one contained in its individual hole on the disk carrier.
The expander module on ARC-4038 is designed with an integrated
ARM Cortex-R4 processor for topology management functions such
as discovery, enclosure and drive management, and LED manage
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ment. Each ARC-4038 compact tower JBOD supports four 12Gb/s
SFF-8644 and one 6Gb/s SFF-8088 SAS host and expansion con
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nections. Out-of-band CLI can re-define manufacture default set
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ting on those connections. Configuration and environmental in
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formation is accessible either via in-band (SES-3.0 over SMP) or
out-of-band serial port.
Unparalleled Performance
The 12Gb/s ARC-4038 offers 28 ports of connectivity in a 8/12-bay
desktop tower. It can provide internally connectivity for up to 8/12
direct attached SAS/SATA HDDs and or SSDs and 20 external ports
(using 4 x SFF-8644 and 1 x SFF-8088 connector) for storage host/
expansion connections. High performance architecture sets new
boundaries of industry performance expectations: 12Gb/s SAS or
6.0Gb/s and 3Gb/s SAS/SATA. The ARC-4038 incorporates the lat
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est enhancements in SAS along with new LSI DataBolt bandwidth
optimizer technology. This is designed to help facilitate the indus-
try transition to 12Gb/s SAS-enabled systems by allowing users
to take advantage of 12Gb/s speeds while utilizing existing 6Gb/s
drives and backplanes. Using DataBolt, the ARC-4038 buffers
6Gb/s data and then transfers it out to the host at 12Gb/s speeds
in order to match the bandwidth between faster hosts and slower
SAS or SATA devices.
