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General

Manufacturer Addonics Synology
Model NAS25HDU2 DS211+
Lowest Price $66.00 Compare Addonics NAS25HDU2 prices $169.99 Compare Synology DS211+ prices
Warranty 2 years limited

Ports

RJ45 Ports 1 x 10/100/1000M
USB Ports 3 x USB2.0
eSATA Ports Yes Yes
Other Ports 1 x SD Card Slot

Storage

Drive Bays 2
Hard Disk Interface 2 x SATA
Hard Disk Size Diskless System
Rotational Speed 7200RPM

Features

  • 2.5IN HARD DRIVE
108MB/sec Reading, 55MB/sec Writing

Windows Access Control List (ACL) Support

Wireless Support

Complete Backup Solutions

256-bit AES Hardware Encryption Engine

Hot Swappable Hard Drives

Cool and Quiet Design

Power-saving with only 24W in Operation

Form Factor

Dimensions 7" x 6" x 3.09" 9.18" x 6.5" x 4.25"
Weight 0.89 lbs 2.76 lbs. lbs
Form Factor 2-Bay

Networking

Data Link Protocol Ethernet Ethernet
Network Interface Controller
DLNA Certified No Yes

Hardware

Standards IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Supported Protocols Networking Protocols: CIFS, AFP, FTP, iSCSI, Telnet, SSH, NFS, WebDAV, SNMP

File System: EXT4, EXT3, FAT32 (External Disk Only), NTFS (External Disk Only)
Processor 1.6GHz CPU
Memory 512MB
RAID RAID 0, 1 and JBOD
LEDs Status, LAN, USB, eSATA, Power, HDD 1, HDD 2, HDD 3, HDD 4
Power AC Input Power Voltage: 100V to 240V
Power Frequency: 50Hz to 60Hz, Single Phase
Power Consump
Temperature Operating Temperature: 5°C to
Humidity 5-95% R.H

Software

Operating System Operating System: Synology DSM 3.0

Supported Clients
- Windows 2000 onward
- Mac OS X 10.3 onward
- Ubuntu 9.04 onward

Supported Mobile Devices (Photo Station, File Station)
- iPhone OS 2.2.1 onward
- Android OS 1.5 onward
- Windows Mobile (IE Mobile or Opera 9.0 onward)
- Symbian OS 9.1, S60 3rd Edition onward
Management Volume Management
- Synology Hybrid RAID
- Max iSCSI Target / LUN: 10 / 10
- Volume Type: Basic, JBOD, RAID 0, RAID 1
- RAID Migration: from Basic to RAID 1
- Expand RAID 1 with Larger Hard Drives

Management
- DSM Upgrade
- Email Notification
- SMS Notification
- Customized User Quota
- DDNS Support
- PPPoE
- Resource Monitor
- UPS Management
- Scheduled Power On/Off
- Custom Management UI HTTP/HTTPS Ports
- System Temperature Display

HDD Management
- HDD Hibernation
- S.M.A.R.T.
- Dynamic Bad Sector Mapping

File Sharing Capability
- Max User Account: 2048
- Max Group: 256
- Max Shared Folder: 256
- Max Concurrent Connections (SAMBA, FTP, AFP): 256

Windows Access Control List (ACL) Support

Windows ADS Domain Integration
- Domain Users login via Samba/AFP/FTP/File Station

Backup Solutions
- Network Backup
- Local Backup
- Time Backup
- Desktop Backup (using Synology Data Replicator 3 or Apple Time Machine backup application)
- SDCopy
- USBCopy
- 3rd-Party Backup Support

Security
- FTP over SSL/TLS
- IP Auto-Block
- Firewall
- Encrypted Network Backup over rsync
- HTTPS Connection

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