QNAP TS-409U 540103G0409TSU User Manual

The biggest challenge for IT managers today is to find a reliable centralized 
storage solution which is able to provide highly stable file storage and 
sharing. It is also important to set up a solid data backup system to protect 
the valuable digital assets against the risk of data loss. QNAP TS-409U 
Turbo NAS offers the most reliable solution with these powerful features and 
provides value-added benefits by minimizing the maintenance cost for IT 
departments of modern business.

QNAP TS-409U is a 1U, 4-bay, hot-swappable All-in-one NAS (Network 
Attached Storage) Server. With the best price performance ratio, it is 
specifically designed for users who need fast performance, mass storage, 
and useful server features. TS-409U is a powerful Linux-embedded system 
with 500MHz SoC CPU and 512MB large-sized DDRII memory. It enables 
major business applications including storing, backing up, sharing, and 
archiving critical information. Advanced RAID configurations for non-stop 
service are also supported. RAID 5 is a widely adopted configuration for 
highly economic data protection that allows one drive failure with the system 
running. RAID 6 allows the failure of maximum two drives to offer business 
users more advanced data protection.

TS-409U supports multiple file sharing protocols for users to share files 
across Linux, Unix, Mac, and Windows platforms. Abundant valuable server 
functions such as File Server, FTP Server, and Printer Server are available. 
Also, Windows AD (Active Directory) is supported to help create an 
easy-to-access environment and lower the maintenance cost. With the dual 
support of MySQL and SQLite, SMB & SOHO users can easily set up their 

own web and database servers. Moreover, users can make use of the 
encrypted remote replication and backup to external devices features for 
extra data protection. Various data storage and management mechanisms- 
FTP server with SSL/TLS encrypted technology, SSH login, and web page 
SSL login are also provided for secure data transfer and access.

The flexible Online RAID Capacity Expansion and Online RAID Level 
Migration features lower the total cost of ownership. Online RAID Capacity 
Expansion allows the administrators to select the most cost-effective hard 
drives for initial server setup and upgrade to larger ones in the future. All the 
stored data will be kept and seamlessly moved to the newly installed hard 
drives without turning off the server. Online RAID Level Migration allows the 
administrators to start from one drive and add more to upgrade the RAID 
level in the future with the data retained.

TS-409U adopts power-saving design which is excellent for long-term 
operation. Meanwhile, hot-swap design is supported. When a hard drive of a 
RAID configuration fails, the administrator can hot swap the failed drive with 
a new one without turning off the server to ensure non-stop services. The 
maintenance cost and effort are also minimized. Besides, the HDD 
S.M.A.R.T. is supported. The administrator can check the health of the hard 
drives and take appropriate action when unhealthy drives are found to 
prevent potential physical drive failure. The comprehensive log system of 
TS-409U summarizes the data access records and connection status. Alert 
emails can be sent to the administrator immediately when an error or a 
warning occurs.

S.M.A.R.T & Advanced HDD Health Scanning (HHS)

TS-409U supports Hard Disk Drive S.M.A.R.T. (Self-Monitoring 

Analysis and Reporting Technology) which enables users to 

monitor the status of hard disk drive and check the potential 

problems. This tool helps prevent unexpected failure of hard disk 

and avoid critical data loss. Moreover, TS-409U is embedded with 

HHS technology which supports disk checking and bad blocks 

scanning to prevent potential data loss.

• 

Data stored on TS-409U is well protected: server manager can create user and 

   password,define the authority and quota of each user.

•

 IP filter control: Server manager can allow or deny specified IP connections to TS-409U.

•

 SSL Security (HTTPS): TS-409U can be accessed and configured by web browser securely.

•

 Remote login to TS-409U by SSH (secure shell) or Telnet connection is supported.

•

 Secure FTP: Data can be transmitted with SSL/TLS (Explicit) encryption. Passive FTP port 

   range setup is also supported.

•

 Smart FTP policy control: The maximum number of all FTP connections and a single account 

   can be configured.

Logs of connections to TS-409U via samba, FTP, AFP, HTTP, 

HTTPS, Telnet, and SSH, and networking services accessed by 

online users are all recorded. Server managers can monitor the 

status of TS-409U closely.

The intelligent automatic backup software, NetBak Replicator, is provided for 

TS-409U users to perform real-time synchronization or schedule backup from 

multiple PCs to TS-409U. TS-409U also works well with other backup 

software, e.g. Arconis True Image, CA BrightStor ARCserve Backup, and 

EMC Retrospect.

The key function of UPS is to provide the power for a period of time 

during power failure. TS-409U supports both APC and MGE UPS 

devices which help users store the data in time and avoid critical data 

loss when power outage occurs during data transfer.

TS-409U supports data backup from internal hard drives to external USB storage device.

TS-409U 

External storage

You can use the encrypted remote replication feature to back up all the data on a TS-409U to 

another QNAP NAS over LAN/ WAN.

TS-409U 

TS-409U 

The high quality SATA signal design of TS-409U  

guarantees better hard drive compatibility and 

more reliable data transfer.

With online RAID capacity expansion, users can select to purchase the most cost-effective hard drives for 

initial server setup and upgrade to larger ones in the future. All the stored data will be kept and 

seamlessly moved to the newly installed hard drives. There is no need to turn off the server during the 

process.

With online RAID level migration, users can start from one drive firstly and add more drive members to 

upgrade the RAID level in the future with the data retained. There is no need to turn off the server 

during the process.

To ensure the data security, TS-409U offers advanced disk configurations for RAID 0, 1, 5, 6, 

5 + Spare, Single, and JBOD. 

When HDD failure occurs, the administrator can be alerted by e-mail alarm and LED indication. The 

failed drive can be replaced by hot swapping without turning off the server. The intelligent data 

rebuilding feature allows users to replace a failed drive by hot-swapping and enables automatic data 

rebuilding to the new drive without suffering from any system downtime.

With the long term test in 

the lab, TS-409U is the 

most stable and reliable 

NAS with the outstanding 

thermal performance

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HDD 

TS-409U is specially designed for different users to share the files 

across Windows, Mac, Linux, and Unix environment.

You can set up an FTP server by TS-409U for data sharing among 

different branches or with your customers over the Internet.

TS-409U  allows server manager to create user ID and password, 

and define the authority and quota for each user. Thus, personal data 

stored on TS-409U is well protected.

The Windows AD feature of TS-409U enables server manager to 

import user accounts from AD domain to NAS to reduce the time 

and effort for account setup. Users can use the same set of login 

name and password to access the domain and NAS.

TS-409U supports up to three USB printers for sharing among 

multiple departments and staff members.