Specifications
1 ATTO Technology Inc. ATTO ExpressSAS Host & RAID Adapter Installation and Operation Manual
1  ATTO Provides Storage Solutions
ATTO Technology ExpressSAS low-profile host adapters provide 3Gb and 6Gb SAS/SATA II connectivity for IT 
and digital video environments. 
The ATTO ExpressSAS host adapter family provides 
enhanced reliability and performance thanks to more 
than 20 years of ATTO experience with SCSI 
hardware and storage connectivity solutions. Using 
the latest in PCI Express bus technology, the ATTO 
ExpressSAS host adapters deliver blazing-fast 
performance with transfer rates.
ATTO provides industry standard PCIe to SAS control 
using Serial SCSI Protocol (SSP), Serial ATA 
Tunneling Protocol (STP), and Serial Management 
Protocol (SMP).
An easy-to-use utility, the ATTO ConfigTool, 
configures, manages and monitors the ExpressSAS 
adapters. The tool is included in your installation CD.
Installation procedure
The ExpressSAS RAID adapter has a Getting Started 
Guide. If you have not used this guide or you are 
installing an ExpressSAS host adapter, follow the 
instructions in this manual. 
In general you must:
1 Ensure you have the equipment and software 
you need for the installation:
• ExpressSAS adapter
• ATTO ExpressSAS CD including drivers, 
user manuals and utilities (Installation CD)
•  The optional low-profile bracket and its 
installation procedure
•  A computer with an available x8 or x16 PCI 
Express expansion slot. The ExpressSAS 
adapter has been optimized for x8 electrical 
slots. Check your computer’s 
documentation
• SAS/SATA storage, cables and connectors
2 Install drivers from the Installation CD for your 
operating system. Refer to Install Drivers
 on 
page 6.
3 Install the configuration software, the ATTO 
ConfigTool, found on the Installation CD. Refer 
to the ATTO Utilities Installation and Operation 
Manual for details.
4 Install the adapter. Refer to Install Hardware
 on 
page 15.
5 Attach SAS/SATA storage. Refer to Install 
storage on page 25.
6 Configure your storage and adapter, including 
RAID, using the ATTO ConfigTool.
Note
Default settings are appropriate for most 
systems but you may change settings using 
the ATTO ConfigTool.
ExpressSAS features
•  Improved performance over traditional 
ULTRA320 SCSI 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 device
• One-click installation
•  User-friendly ATTO ConfigTool provides a 
simple host-based utility for effortless 
configuration; a BIOS setup utility provides 
flexibility for custom applications
•  Fully Thunderbolt aware, including hot plug and 
daisy chain support in a PCIe expansion slot
•  For RAID adapters, a user-friendly GUI allows 
quick and easy RAID setup
•  ADS™ technology alleviates data transfer 
bottlenecks and moves data more efficiently 
while managing latency
•  DriveAssure™ is an ATTO exclusive 
combination of features, for the ATTO RAID 
series HBAs, that performs predictive and 
corrective actions to allow the continued 
operation of marginal drives, while ensuring 
continued and uninterrupted access to data.
•  CacheAssure™ provides confidence that your 
cached data will remain intact in the event of an 
unexpected power loss, while offering an 
environmentally friendly, maintenance-free 
solution. (6Gb RAID Adapter only)
•  Driver support for Windows®, Linux®, 
  Mac® OS X, and VMware® ESX/ESXi Server
• RoHS compliant 
• 3-year standard warranty










