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N0503 ComboNAS 1 NAS 2 Ways 3 cross 5
  • Incredibly Powerful Yet Easy to Use
  • Secure and Flexible Storage
  • A Multimedia Powerhouse
  • Save Time and Money



Media: PChome,電腦王,T客邦 | Country: Taiwan

The N0503 "High-endurance NAS" sports a potent Intel Atom processor with 1GB of SDRAM. Not only does it have excellent performance, but it has also proven itself to be a sophisticated, multifaceted NAS. Offering support for two different types of disks, the N0503 can hold three 3.5" hard drives or five 2.5" hard drives. This greatly increases the flexibility and convenience that it offers SMB's and home users.

Media: | Country: Denmark

"The installation of both hardware and firmware update was quite simple...The web interface works quite well; it's just shame that they have not got it to fill the entire screen, but this will come in a future firmware update. There was never difficult to find the desired functionality in GUI. Overall performance is at the top of the scale...”

Media: PC3 Corporate | Country: HK

"The N0503 ComboNAS allows users to set when the unit powers on and powers off, for instance having the unit power on during office hours, and turning off automatically after work. This way, users can save on overall power usage. In addition, the N0503 ComboNAS has wake-on-LAN functionality, which means that you can turn the NAS on and off by issuing a command through the network - greatly saving power in the process.”

Media: Alt om Data | Country: Denmark

"This NAS is quite advanced and supports many different functions…Media Server supports DLNA or UPnP devices, iTunes server, print server, FTP server, and photo server functionality. Of course, the usual file server capabilities and backup can also be easily initialized with this NAS.”

Media: CCE Reviews | Country: USA

“Getting the unit up and running is a breeze. Within 10 minutes, I had the hard drives in, the unit booted, web UI loaded and all ready to setup RAID...It is packed with features, and it is flexible. The N0503 is fast- there is no doubt about that and even in RAID 5 it manages to sustain some excellent numbers. For a three drive NAS, or five 2.5” drive NAS the N0503 happens to fall into the more expensive side of things, but alas is the nature of performance hardware…While it does cost a bit more, the N0503 can easily runs circles around the majority of three and even some four drive network attached storage units offered today.”


  • Incredibly Powerful Yet Easy to Use
    The N0503 is powered by an Intel Atom processor for excellent system response and data throughput. Plus, the N0503 is extremely easy to manage thanks to an all-new web-based interface featuring AJAX technology.
  • Secure and Flexible Storage
    Your data is secured with support for RAID 0, 1, 5, 6, and JBOD, in addition to multiple RAID volumes. The N0503 can also be outfitted with three 3.5" hard disks or five 2.5" hard disks for incredible flexibility.
  • A Multimedia Powerhouse
    With support for iTunes, a built-in photo album, and uPnP AV streaming, the N0503 makes an excellent addition to the living room. And with very low noise output, it won't disturb you when you're watching your favorite movies or listening to some relaxing tunes.
  • Save Time and Money
    Extremely low power consumption means the N0503 will save you money on your electric bill. Plus, with the included download manager, the N0503 can download your HTTP, FTP, BT, or eMule downloads during off peak hours, so you can save your bandwidth for when you need it most.


Ever the innovator, Thecus® Technology has racked up an impressive number of firsts. In 2005, Thecus® introduced the world's first DAS device with eSATA support, enabling file transfers of up to 3Gb/s. With the N3200 in 2007, Thecus® brought the security of RAID 5 to a home NAS. Today, Thecus® is pleased to reveal the world's first NAS device with the ability to accommodate both 2.5” and 3.5” hard disksthe N0503. 

One look at the N0503 tells you it's different. Using its special combo hard disk bays, the N0503 can actually support up to five 2.5” hard disks or three 3.5” hard disks. Fill the N0503 with three 3.5” hard disks and the N0503 is a high-performance three-bay NAS with up to 6TB of storage capacity. Equip the N0503 with five 2.5” hard disks, and you have a five-bay NAS unit that offers lower power consumption and noise. With dual form-factor hard disk support, users are given unparalleled flexibility with the N0503.

The N0503 also offers quick system response and file transfer capabilities with its powerful Intel® ATOM CPU and dual Gigabit Ethernet ports. Multiple RAID modes including RAID 0, 1, 5, 6, and JBOD are selectable, and auto volume rebuild, hot swap and hot spare capabilities mean maximum data reliability. The N0503 also comes with advanced data protection in the form of disk array roaming and Nsync – Thecus' remote replication utility. Speedy and secure, the N0503 makes a perfect place to house your digital data.

But storing and securing data is only part of the equation. The N0503 also comes with a slew of advanced features that really take NAS storage to the next level of usability and convenience. With support for an iTunes server, a photo web server, and uPnP AV streaming, the N0503 is an ideal media hub for the digital home. Connect the N0503 to your home network and stream music and movies throughout your house. With the built-in IP camera surveillance server, you can use the N0503 to keep tabs on your home or office for enhanced security, and with included download manager, you can download BT and eMule files during off-peak hours to maximize your available bandwidth and reserve peak hours for other more critical tasks. To top it all off, a slick LCD panel notifies you of critical system information at a glance and a completely revamped AJAX-based web GUI makes the N0503 easier to use than ever.

Equipped with dual hard disk support, advanced data security and strong performance, Thecus® has once again changed the rules of NAS storage with the N0503.

“We knew the N0503 would turn a lot of heads when we released it, and with good reason,” notes Thecus General Manager Florence Shih. “By thinking outside the box, Thecus® has proven once again its spirit of creativity and innovation with the N0503 - the most flexible NAS storage device on the market.”


1.Hardware Platform




Intel® ATOM™ Technology

SATA device

3x3.5” or 5x2.5” SATA for internal, 1xeSATA for external

System Memory


LAN Interface (PCI-e)

RJ-45x2 : 10/100/1000 BASE-TX Auto MDI/MDI-X
WOL supported

USB Interface

USB 2.0 host port x2(Front x1, Back x1) (A Type)

LCM Module


LED indicator

  • Power(Blue)
  • HDD1-5 Activity/Fail(Green/Red)
  • WAN (Link : Green; Activity : Green)
  • LAN (Link : Green; Activity :Green)
  • PCI Slot


    Power supply

    96W External Power Adaptor

    Disk interface

    SATA via backplane

    Thermal/Fan control

  • Thermal sensor on processor temperature
  • Temperature controlled system FAN speed
  • Buttons
  • Power button(Front, power down controlled by S/W)
  • Reset button
  • LCM button (ENT,ESC,UP, DOWN)
  • Environment

  • Temperature : 5°C to 40°C
  • Humidity : 0 ~ 80 % R.H. (Non-condensing)
  • Dimension

    Tower Base

    Sound Pressure Level  

    2. Software Functions 


    RAID modes

    RAID 0, 1, 5,6,10,JBOD





    Hot spare


    SMART Info


    SMART Test


    On line RAID Migration


    On line RAID Expansion


    RAID Volume Encryption



    Power management

    Spin down while idle time setup

    Bad Block Scan



    Support roaming to other N0503



    Fixed IP Address, Dynamic IP Address,

    IP sharing mode

    Can be enabled/disabled

    Transport Protocols


    File Protocols


    Link Aggregation

    802.3ad, load balance and fail over

    Data Access

    Client OS support

    Windows XP and after
    Windows Server 2003 and after
    Mac OS X


    Web-based file access


    File transmission protocol

    Secure FTP

    Secure File transmission protocol

    Download Manager

    HTTP / FTP / BT / eMule

    Printer Server (IPP)

  • Support USB printers
  • Support IPP various printers
  • Client can manage(List/Delete) the print job queue on WEB interface
  • Data Backup

    NAS Remote Replication

    Via Thecus proprietary Nsync

    USB device copy to N5500

    Through LCM to control



    Bi-directional USB Copy


    Client data backup

    Acronis True image(OEM version)

    Client system Disaster Recovery

    Acronis True image(OEM version)

    Block Level Access

    iSCSI Target

    For stackable with N5200/1U4500/N7700

    iSCSI initiator

    Supports Microsoft/Mac/Linux Initiator

    iSCSI Thin Provisioning


    Power management

    Schedule power on/off


    Volume management

    Multiple RAID


    Multiple file system selectable

    Ext3 / XFS / ZFS

    Multimedia Support (Options for module upload)

    iTunes Server

    Supported File Types: AAC, MP3 w/ ID3 tag, WAV

    Photo Web Server

  • Supported File Types: GIF, JPG (JPEG), BMP, PNG
  • Supports EXIF display
  • Supports slide show
  • Media server

    Supports uPnP AV streaming protocol

    User Authentication

    Local User

    Supports built-in user accounts

    Local Group

    Supports built-in user groups

    Windows NT/ADS


    File System


    Journaling File System



    Language Support

    Unicode Support

    Authorization (ACL)

    Read, Write or Deny options on individual users or groups for share and sub-folders


    Multi-Lingual Web-based administration (Default auto)

    Web-based server management Interface Supports English, Traditional Chinese, Simplified Chinese, Japanese, Korean, French, German, Italian, Spanish, Russian and Polish

    Utility Program

  • MS Windows Setup Wizard, Support Windows 7/2000/XP/2003/Vista
  • Mac setup Wizard (OSX only)
  • Email notification

    Sends system messages via Email to the system administrator

    SNMP trap

    System information trap out


    Web Disk


    Recycled bin


    Web Server


    ISO Mount


    User module


    IP CAM surveillance Server

    Supported to 20 IP CAM device

    Package Contents

    Accessory Bag Ethernet Cable Power Cord 3 to 5 HDD Cage
    Acronis True Image DVD Universal CD QIG Warranty Card
    HDD Compatibility List Card

    How To

    NAS 101

    Connecting to your NAS

    Backup and Data Security

    Thecus TV

    Discover iSCSI and how to use it with a Thecus NAS

    This tutorial is separated in three parts. The first part will teach you what's iSCSI and how it can be used. The second and third part would be practical demonstration on iSCSI Target/Initiator. Only the second part requires a Thecus NAS!