ExpressSAS R348
Low-Profile SAS RAID Adapter
4 External and 4 Internal Ports
or 8 Internal Ports, Configurable
Product Features
Blazing Fast Performance
• Up to 3-Gb/sec per port
transfer rates with SAS, SATA
and SATA II attachment
• Increased bandwidth through
x8 PCI Express host interface
• Point-to-point technology
delivers full throughput to
each connected storage
Smooth Data Streaming
• Alleviate data transfer
bottlenecks and move data
more efficiently while
managing latency with
ATTO’s exclusive ADS™
• Improve I/O through
optimized data movement
One Click Installation
• One-click installation allows
for quick and easy set-up
• Simple GUI based utility for
effortless adapter
• BIOS setup utility provides
flexibility for custom
ATTO introduces the ExpressSAS R348 LowProfile RAID Adapter. Providing 3-Gb SAS/SATA II
connectivity with integrated RAID support and
flexible port configurations, the ATTO SAS RAID
adapter is ideal for both IT and digital video
environments that require a high level of data
protection and performance.
The ATTO ExpressSAS host adapter product
family provides enhanced reliability and
performance thanks to more than 15 years of
experience with SCSI hardware and storage
connectivity solutions. Using PCI Express bus technology and the flexibility of either a 4 external and 4
internal or an 8 internal user selectable port configuration, the ATTO ExpressSAS R348 adapter
delivers blazing-fast performance with transfer
rates of up to 3-Gb per second per port. With two
x4 Mini SAS connectors, configured internally or
combined internal and external, the R348 provides
connectivity of up to 64 SAS/SATA targets. The
R348 also features 256MB of ECC-protected
DDR2 DRAM to allow support for multiple RAID
The ATTO ExpressSAS RAID adapters are
engineered for the most stringent IT server and
digital media workgroup environments. To satisfy
the data protection requirements of these
environments, ATTO leverages it’s time tested
ATTO RAID Stack (ARS™) technology based on a
proven RAID core that is compatible with multiple
operating systems, applications, and drives.
The easy-to-use GUI utility enables RAID
management, monitoring, and configuration. ATTO
also incorporates it’s field proven Advanced Data
Streaming (ADS™) technology to meet the most
demanding performance requirements of data
intensive applications. In addition, ATTO provides
industry standard PCIe to SAS control using Serial
SCSI Protocol (SSP), Serial ATA Tunneling
Protocol (STP), and Serial Management Protocol
TechExpressSAS R348 RAID Adapter
RAID Adapter
Technical Highlights
• x8 PCIe host interface
• True low-profile form
• User Selectable: 4
external and 4 internal
ports or 8 internal ports
• Outstanding performance
with up to 3-Gb/sec per
• Highly configurable
RAID (0, 1, 4, 5, 6, 10, 50,
• Supports up to 128
virtual SAS/SATA drives
• Exclusive Advanced Data
Streaming (ADSTM)
• User friendly GUI
configuration utility
• Driver support for
Windows®, Linux and
Mac® OS X
• RoHS Compliant
• 3-year standard
product warranty
For More Information:
ExpressSAS Low-Profile RAID Adapter
4 External and 4 Internal Ports or 8 Internal Ports
Hardware Specifications
Maximum Transfer Rate
Advanced Capabilities
PCI Bus Specifications
Support for IT server and digital media workgroup solutions requiring high-bandwidth and data
protection. Applications include audio/video, VOD, fixed content, database and other data intensive
Up to 3-Gb/sec per port
Device support for SAS, SATA and SATA II
SES Support
S.M.A.R.T Support
Support for staggered drive spin-up
Pass-through mode to support tape devices
Support for RAID levels 0, 1, 4, 5, 6, 10, 40, 50, 60, JBOD and DVRAID
On-line capacity expansion
Hot spare, auto-rebuild
Native Command Queuing
Cache memory—256MB ECC protected memory
User friendly GUI for RAID setup
External LEDs for on-line status
x8 PCI Express host interface
Supports PCI Express Base Spec 1.0a
Easy-to-install full height connection bracket; low-profile bracket included in Finished Goods packaging
Two x4 Internal Mini SAS (SFF-8087) connectors
One x4 External Mini SAS (SFF-8088) connector
Software Specifications
Driver Support
Windows® Server 2003, 2008, XP, Vista
Mac® OS X (10.4.x & 10.5.x)
Linux (Fedora, Red Hat and SuSE)
Agency Approvals
Safety and Environmental
FCC Rules, Part 15, Class B
CE Mark: CISPR 22:2002
EN55022:2002, Class B
RoHS Compliant
Environmental & Physical Specifications
Operating Environment
Storage Environment
Conforms to PCI low-profile form factor specifications
Temperature: 0-40° C (32°-104°F)
Humidity: 5 - 95% non-condensing
Temperature: -40°-70°C (-40°-157°F)
Humidity: 5 - 95% non-condensing
12V @ 1.05A max.
3.3V @ 0.45A max.
150 lf/m (min) recommended
ESAS-R348-000 (RoHS)
Ordering Information
Model Number
C o m p u For
t eMore
r Information:
G m b H
Technical Specification
ExpressSAS R348 RAID Adapter
©2008 ATTO Technology, Inc. Specifications subject to change without notice
Carl-Zeiss-Str. 27-29 • D-73230 Kirchheim / Teck
Tel. +49(0)7021-487 200 • Fax +49(0)7021-487 400
Rev 9/08