Search

TS-421U Specification

TS-421U
Specification
Buy→
CPU Marvell 2.0 GHz
DRAM 1GB DDR3 RAM
Flash Memory 16MB
Hard Disk Drive 4 x 3.5" or 2.5" SATA HDD
NOTE:
  1. The system is shipped without hard disk drives.
  2. For the hard disk drive compatibility list, please visit www.qnap.com/compatibility
Hard Disk Tray 4 x hot-swappable and lockable tray
LAN Port 2 x Gigabit RJ-45 Ethernet port
LED Indicators USB, Status, HDD 1, HDD 2, HDD 3, HDD 4, LAN
USB 2 x USB 3.2 Gen 1 port, 2 x USB 2.0 port
Supports USB printer, disk, pen drive, USB hub, and USB UPS, etc.
eSATA 2 x eSATA port (Back)
Buttons System: Power button, USB one-touch-backup button, reset button
Alarm Buzzer System warning
Form Factor Rackmount
Dimensions 44(H) x 439(W) x 483(D) mm
1.73(H) x 16.97(W) x 19.02(D) inch
Weight Net weight: 6.7 Kg (14.77 lb)
Gross weight: 9.5 Kg (20.94 lb)
Power Consumption (W) Sleep mode: 12W
In operation: 33W
(with 4 x 500GB HDD installed)
Temperature 0-40˚C/ 32-104°F
Relative Humidity 5~95% RH non-condensing, wet bulb: 27˚C.
Power Supply Input: 100-240V AC, 50/60Hz, Output: 250W
Fan 2 x quiet cooling fan (4 cm, 12V DC)
Note: Use only QNAP memory modules to maintain system performance and stability. For NAS devices with more than one memory slot, use QNAP modules with identical specifications and refer to the hardware user manual to install compatible QNAP memory modules.
Warning: Using unsupported modules may degrade performance, cause errors, or prevent the operating system from starting.
QNAP reserves the right to replace partial parts or accessories if the original is no longer available from its manufacturer/supplier. Any replacement would be fully tested and verified to meet strict compatibility and stability guidelines and will deliver identical performance to the original.
The terms HDMI, HDMI High-Definition Multimedia Interface, HDMI trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.
Product images are for illustrative purposes only and may differ from the actual product. Due to differences in monitors, colors of products may also appear different to those shown on the site.
Designs and specifications are subject to change without notice.
Operating System
QNAP Firmware v3.8
Disk Management
  1. Single Disk, JBOD, RAID 0 / 1 / 5 / 5+Hot Spare / 6 / 10
  2. Online RAID Capacity Expansion & Online RAID Level Migration
  3. Bad Block Scan & Hard Drive S.M.A.R.T.
  4. Global Hot Spare Drive
  5. RAID Recovery
  6. Bitmap Support
Supported Operating System
  1. Apple Mac OS 10.7 or later
  2. Linux and UNIX
  3. Microsoft Windows 7, 8, and 10
  4. Microsoft Windows Server 2003, 2008 R2, 2012, 2012 R2 and 2016
iSCSI (IP SAN)
  1. iSCSI Target with Multiple LUNS per Target (Up to 256 Targets/LUNs Combined)
  2. LUN Mapping & Masking
  3. Online LUN Capacity Expansion
  4. Supports SPC-3 Persistent Reservation
  5. Supports MPIO & MC/S
  6. iSCSI LUN Backup, One-time Snapshot, and Restore
  7. iSCSI Connection and Management by QNAP Finder (Windows)
  8. Stack Chaining Master: Up to 8 Virtual Disk Drives (via iSCSI Initiator)
Supported Web Browsers
  1. Microsoft Internet Explorer 10+
  2. Mozilla Firefox 8, 9, 10
  3. Apple Safari 4, 5
  4. Google Chrome
Web Administration
  1. AJAX-based User Interface
  2. Smart Fan Control
  3. Dynamic DNS (DDNS)
  4. SNMP (v2 & v3)
  5. Resource Monitor
  6. Network Recycle Bin for File Deletion via CIFS/SMB and AFP
  7. Automatic Cleanup
  8. File Type Filter
  9. Comprehensive Logs (Events & Connection)
  10. Syslog Client
  11. Firmware Live Update
  12. System Settings Backup and Restore
  13. Restore to Factory Default
  14. Mobile App Qmanager for Remote Monitoring
Multilingual Support
  1. Chinese (Traditional & Simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, Turkish
Power Management
  1. Wake on LAN
  2. Internal Hard Drive Standby Mode
  3. Scheduled Power on/off (Max 15 Settings)
  4. Automatic Power on after Power Recovery
  5. USB and Network UPS Support with SNMP Management
File System
  1. Internal HDD: EXT3, EXT4
  2. External HDD: EXT3, EXT4, NTFS, FAT32, HFS+
Access Right Management
  1. User Accounts Management
  2. User Groups Management
  3. Network Shares Management
  4. Batch Users Creation
  5. Import/Export Users
  6. User Quota Management
  7. Local User Access Control for CIFS, AFP, FTP, and WebDAV
  8. Application Access Control for Photo Station, Music Station, Video Station, and Multimedia Station
  9. Subfolder Permissions Support for CIFS/SMB, AFP, FTP and Web File Manager
Networking
  1. TCP/IP (IPv4 & IPv6: Dual Stack)
  2. Dual Gigabit NICs with Jumbo Frame
    • Failover
    • Multi-IP Settings
    • Port Trunking/NIC Teaming (Modes: Balance-RR, Active Backup, Balance XOR, Broadcast, IEEE 802.3ad/Link Aggregation, Balance-TLB and Balance-ALB)
  3. Service Binding based on Network Interfaces
  4. Proxy Client
  5. DHCP Client, DHCP Server
  6. Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC
  7. TFTP Server with PXE Booting
  8. UPnP & Bonjour Discovery
  9. USB Wi-Fi Adapter Support
Domain Authentication Integration
  1. Microsoft Active Directory (AD)
  2. LDAP Server
  3. LDAP Client
  4. Domain Users Login via CIFS/SMB, AFP, FTP, and Web File Manager
Backup Solution
  1. Real-time Remote Replication (RTRR)
    • Works as Both RTRR Server & Client with Bandwidth Control
    • Real-time & Scheduled Backup
    • Encryption, Compression, File Filter, and Transfer Rate Limitation
  2. Block-level Remote Replication
    • Works as Both Rsync Server & Client with Bandwidth Control
    • Encrypted Replication between QNAP NAS Servers
  3. USB One Touch Backup (Import/Export)
  4. Desktop Backup by QNAP NetBak Replicator for Windows
  5. Apple Time Machine Support with Backup Management
  6. Data Backup to Multiple External Storage Devices
  7. Data Backup to Cloud Storage (Amazon S3, ElephantDrive, and Google Cloud Storage)
MyCloudNAS Service
  1. Private Cloud Storage and Sharing
  2. Free Host Name Registration (DDNS)
  3. Auto Router Configuration (via UPnP)
  4. MyCloudNAS Connect for Easy VPN Connection (Windows VPN Utility)
Security
  1. IP Filter & Policy-based Automatic IP Blocking
  2. Network Access Protection with Auto-blocking: SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP
  3. Encrypted Access: HTTPS, FTP with SSL/TLS (Explicit), SSH/ SFTP (admin only), Encrypted Remote Replication between QNAP NAS Servers (Rsync over SSH)
  4. CIFS Host Access Control for Shared Folders
  5. Antivirus Protection
  6. Importable SSL Certificate
  7. Instant Alert via E-mail, SMS, Beep
Storage Plug & Play
  • Windows Software: QNAP Finder
  • Create and Map Shared Folders
  • Create and Connect to iSCSI Target/LUN
Powerful All-in-one server
File Server
  1. File Sharing across Windows, Mac, and Linux/UNIX
  2. Windows ACL
  3. Advanced Folder Permission for SMB, AFP, FTP, Web File Manager
  4. Shared Folder Aggregation (CIFS/SMB)
  5. Web File Manager
    • Supports ISO Mounting (Up to 256 ISO files)
    • Direct File Viewing via Google Doc
    • Create and Send Download Links for Public File Sharing with Expiration Time and Password Protection
    • Mobile App: Qfile for File Browsing and Management
Photo Station
  1. Supported File Formats:
    • Photo: BMP, JPG, JPE, PNG, TGA, GIF, and more.
    • Video: API, MP4, and more.
  2. Image Slideshow with Background Music, Thumbnails, and Different Transition Effects
  3. Online Photo Editing by Pixlr Editor
  4. Geotagging Photos with Google Maps
  5. Slideshow Sharing (from Private Albums) with Password Protection
  6. Photo Publishing to Social Websites (Facebook, MySpace, Twitter, Plurk, and Blogger)
  7. Photo Sharing by Email
FTP Server
  1. FTP over SSL/TLS (Explicit)
  2. Max No. of Concurrent Connections: 256
  3. FXP Supported
  4. Passive FTP Port Range Control
  5. FTP Bandwidth & Connection Control
  6. Unicode Support
Music Station
  1. Plays or Shares Music Collections with Web Browser
  2. Automatic Classification via Media Library
  3. Supported audio format: MP3, FLAC, OGG, WAV, AIF, AIFF, and more.
    * DRM encryption format is not supported.
  4. Internet Radio (MP3)
  5. Up to 8 Music Alarms
Backup Server
  1. Remote Replication Server (over Rsync)
  2. Real-time Remote Replication to another QNAP NAS or FTP Server
  3. Apple Time Machine Support
  4. Windows Client Backup Application: QNAP NetBak Replicator
  5. Third Party Backup Software Support: Acronis True Image, CA BrightStor, ARCserve Backup, EMC Retrospect, Symantec Backup Exec, LaCie SilverKeeper, etc.
Video Station
  1. Web Video Sharing
  2. Video Categorization and Transcoding
    • Supported format: API, MP4, and more.
  3. Video upload
    • Up to 2048MB in size
    • Up to 320 minutes in length
    • Batch upload (max 50)
  4. Publish Videos to Facebook, Twitter, and Google+
Web Server
  1. HTTP/HTTPS Connections
  2. Supports WebDAV Connection
  3. Support Virtual Host (Max: 32)
  4. Importable SSL Certificate
Database Server
  1. Built-in MySQL Server
  2. Web-based Management via phpMyAdmin (QPKG)
Download Station
  1. PC-less BT, FTP, HTTP Download (up to 500 Tasks)
  2. BT Download
    • Supports TCP/UDP Tracker Protocol
    • Scheduled Download
    • Configurable Port Range
    • Bandwidth Control
    • UPnP NAT Port Forwarding
    • RSS Subscription and Download (Broadcatching)
    • Selectable Download Files
    • Configurable Saving Directory
  3. HTTP/ FTP Download
    • Bulk Download with Wildcard Settings
    • RapidShare Download Support
  4. Website Subscription Service: YouTube
  5. QNAP Download Management Software: QGet
    • For Both Windows & Mac OS
    • Manage the Download Tasks of Multiple QNAP NAS Remotely over LAN or WAN
Print Server
  1. Max No. of Printers: 3
  2. Supports Internet Printing Protocol
    • Print Job Display and Management
    • IP- and Domain Name-based Privilege Control
  3. Supports Apple Bonjour Printing
DJ Station
  1. Live Web Broadcasting of Music Playlists
  2. Share with Facebook Friends
Syslog Server
  1. Centralized Log Monitoring and Archiving
  2. Immediate Email Alerts
  3. Supports Log Filtering
Antivirus
  1. Protection against the Latest Known Viruses, Trojans, and Other Threats
  2. Free Virus Databases Update on Manual or Scheduled Basis
  3. Multiple Scan Tasks (Max: 64, Concurrent: 5) with Custom Folder Selection and Scheduled Scanning
  4. Email Notification upon Task Completion or Virus Detection
  5. Quarantines or Deletes Infected Files
RADIUS Server
  1. Centralized Account Management and Authentication for Network Access
  2. Supports PAP, EAP-TLS/PAP, and EAPTTLS/PAP Authentication
App Center
  1. Expands Application Services by Easy Online Installation with a Wide Variety of Official and Community QPKG Add-ons

 The actual available QPKGs may vary depending on the NAS platform.
VPN Server
  1. Secure Remote Access: PPTP & OpenVPN VPN services
  2. Remote Access to Other Resources on Local Network
  3. Max No. of Clients: 30
Surveillance Station
  1. Supports over 2,700 IP cameras
  2. Includes 2 Free Camera License
  3. Up to Max. 12 Camera Channels via additional License Purchase
  4. Intelligent Video Analytics (IVA) for Advanced Video Search
  5. Visual aids by E-maps
  6. Surveillance Client for Mac
  7. Mobile app: Vmobile (iOS & Android)
*Design and specifications are subject to change without notice.
TS-421U CD-ROM Ethernet cable x 2
Screw x 8 Handle x 2 Quick Installation Guide
Power cord Mount kit x 2 Hard disk lock
 
Flat head screw x 16 (for 3.5" HDD) Flat head screw x 12 (for 2.5" HDD)  

Optional Accessories

  1. FAN-4CM-R02
    FAN-4CM-R02
    SP-4BAY-PSU
    SP-4BAY-PSU
    SP-6BAY-PSU
    SP-6BAY-PSU
    SP-EAR-BLK-01
    SP-EAR-BLK-01
    SP-TS-TRAY-BLACK
    SP-TS-TRAY-BLACK
Bundled accessories delivered together with the product such as expansion cards, power adapter, and accessories are covered with one-year warranty.

Choose specification

      Show more Less

      Choose Your Country or Region

      open menu
      back to top