Adaptec RAID 3805
The mid-range Series 3 family of Unified Serial adapters delivers the richest RAID feature set on the market
8-internal port, low profile, PCI-Express (PCIe) Unified Serial RAID adapter delivers flexibility and advanced data protection to pedestal and high-density rack mount servers.
Adaptec RAID 3805
Product DescriptionTechnical SpecificationsPurchase Options
Product DescriptionTechnical SpecificationsPurchase Options
Product DescriptionTechnical SpecificationsPurchase Options

The Series 3 family of Adaptec Unified Serial™ (SATA/SAS) raid adapters hits the sweet spot of flexibility and performance by supporting either high-capacity SATA drives, high-performance SAS drives, or both on a single system.

The Adaptec RAID 3805 features 500 MHz of processing power, a 128MB or 256MB ECC-protected data cache, connectivity with x4 PCI-Express, and scalability up to 128 devices using SAS expanders.
The Adaptec RAID 3805 supports a wide range of operating systems, compatibility with more than 300 third-party devices, and full integration with Adaptec Storage Manager™ for centralized management of all Adaptec raid adapters on the network.


8 internal ports
MD2 – Low profile form factor
Intel 80333 500MHz processor
4-Lane PCI-Express bus interface
RAID levels 0, 1,1E, 5, 5EE, 6, 10, 50, 60, JBOD
128MB or 256MB cache
Up to 128 SATA or SAS devices using SAS expanders scalability
2 SFF-8087 (int.) connectors
Adaptec Storage Manager, Copyback Hot Spare
Battery backup (optional)
RoHS compliant
3 year warranty
Complete List of Supported Operating Systems
Supported Operating Systems

Microsoft Windows
Red Hat Linux
SUSE Linux
Novell NetWare
SCO OpenServer
Sun Solaris
VMware ESX Server

For a detailed list see ASK Answer ID 15059

Key Differentiators
  Affordable Unified Serial RAID adapters support both SATA and SAS devices. Ideal for workstations, and entry to mid-range servers.
Customer Needs
  Affordability and performance with an advanced feature set for customers needing storage flexibility and capacity growth.
System Environment
  Intel IA32, EM64T, and AMD64
Form Factor
  MD2 Low-profile
Cache Memory
128MB of DDR2 memory
RAID Levels
RAID 0, 1, 1E, 5, 5EE, 6, 10, 50, 60, JBOD
Key RAID Features
• Supports 8 direct-attached or up to 128 SAS or SATA disk drives using SAS expander
• RAID Levels 0, 1, 10, 5, 50, JBOD
• Advanced Data Protection Suite
• RAID Levels 1E (Striped Mirror), 5EE (Hot Space), 6 and 60 (Dual Drive Failure Protection)
• Copyback Hot Spare
• Snapshot Backup (optional)
• Dynamic caching algorithm
• Online Capacity Expansion
• RAID Level Migration
• Optimized Disk Utilization
• Quick Initialization
• Native Command Queuing (NCQ)
• Hot spares – global, dedicated, and pooled
• Background initialization
• Automatic/manual rebuild of hot spares
• SAF-TE enclosure management support
• Configurable stripe size
• S.M.A.R.T. support
• Up to 512TB array sizes
• Multiple arrays per disk drive
• Bad stripe table
• Dynamic sector repair
• Staggered drive spin-up
• Bootable array support
• Hot-plug drive support
• Redundant path failover
Bus System Interface Type
4-lane PCIe
Internal Connectors
2 internal (SFF-8087) Mini SAS
Data Transfer Rate
3 Gb/s per port
Package Contents
• Adaptec RAID 3805 Adapter
• Additional low-profile bracket
• Quick Installation Guide
• Software and documentation CDs
• Cables: two Mini SAS x4 to (4x) SATA fanout cable w/ sideband, 0.5 meter
3 years

Management Utilities

 Adaptec Storage Manager™ (ASM)
 • Java-based GUI Management Utility
 • Remote configuration, monitoring & notification
 • ASM OS Support: Windows, Linux, SCO, Solaris, NetWare
 • Microsoft VDS Support
 • Simultaneous remote firmware updates

 • Command Line Interface
 Adaptec BIOS Configuration Utility (ACU)
 • BIOS level configuration utility
 • Flashable BIOS support

Physical Size

2.5" H x 6.6" L (64mm x 167mm)

Operating Temperature

0°C to 55°C* (with 200 LFM airflow; without battery)
0°C to 40°C* (with 200 LFM airflow; with battery)

Note: This Adaptec card contains a powerful RAID processor which requires adequate airflow to operate reliably. Please install this card only into server or PC chassis with recommended airflow (200 LFM).

* Ambient temperature measured 1" away from the RAID processor

Operating Voltage

1 amp @ 3.3V

Regulatory Certification

FCC, UL, C-tick, CE, VCC


Snapshot Backup Key (2228200)
Adaptec Battery Module ABM-800 (2248000-R)

Mean Time Before Failure (MTBF)

836,077 hours at 40 degree C.