TS-420U
TS-420U
TS-421U
TS-421U
Model TS-420U
TS-421U
Segment SOHO/ SMB
SOHO/ SMB
OS Embedded Linux
Embedded Linux
CPU Marvell 1.6 GHz
Marvell 2.0 GHz
Memory (RAM) 1GB
1GB
Flash 16MB
16MB
Number of RAM Slots -
-
Max. number of HDDs/SSDs 4x 2.5" or 3.5" SATA 3Gb/s
4x 2.5" or 3.5" SATA 3Gb/s
Hot-Swappable HDD Tray Yes, Lockable
Yes, Lockable
Internal Cache Port -
-
Gigabit LAN Ports 2
2
10GbE -
-
Expansion Slot -
-
USB 2.0 2
2
USB 3.0 2
2
eSATA 2
2
IR (Infrared Receiver) -
-
SD Card Slot -
-
S/PDIF -
-
VGA -
-
HDMI -
-
LED Indicators Status, LAN, USB, HDD 1-4
Status, LAN, USB, HDD 1-4
LCD Display/ Button -
-
Buttons Power, Reset, USB Auto Copy
Power, Reset, USB Auto Copy
Form Factor 1U Rack Mount
1U Rack Mount
Dimensions (DxWxH) mm 483x 439x 44
483x 439x 44
Weight (Net/ Gross) 6.7kg/11.06kg
6.7kg/11.06kg
Temperature 0 - 40 °C
0 - 40 °C
Humidity 5 - 95% R.H
5 - 95% R.H
Power Supply Specification External Power Adapter, Input: 100-240V AC, 50/60Hz, Output: 250W, 47-63Hz, 3.5A
External Power Adapter, Input: 100-240V AC, 50/60Hz, Output: 250W, 47-63Hz, 3.5A
Power Consumption: HDD Sleep Mode (W) 15
12
Power Consumption: Operating Mode, Typical (W) 29
33
Power Off (Wake-On-LAN/WOL) (W) -
-
Power Consumption: Power Off (W) 0.05
0.05
Windows Upload (MB/s) 72
76
Windows Download (MB/s) 106
108
AES 256-bit Encypted Windows Upload (MB/s) -
-
AES 256-bit Encypted Windows Download (MB/s) -
-
File System: Internal Hard Drive EXT4
EXT4
File System: External Hard Drive EXT3, EXT4, NTFS, FAT32, HFS+
EXT3, EXT4, NTFS, FAT32, HFS+
Port Trunking Balance-rr (Round-Robin),Active Backup, Balance XOR, Broadcast, IEEE 802.3ad, Balance-tlb (Adaptive Transmit Load Balancing), Balance-alb (Adaptive Load Balancing)
Balance-rr (Round-Robin),Active Backup, Balance XOR, Broadcast, IEEE 802.3ad, Balance-tlb (Adaptive Transmit Load Balancing), Balance-alb (Adaptive Load Balancing)
Multi-IP Settings Yes
Yes
Dynamic DNS Yes
Yes
Network Service Discovery (UPnP & Bonjour) UPnP & Bonjour
UPnP & Bonjour
Virtual LAN (VLAN) -
-
Wireless LAN via USB Wi-Fi Adapter Yes
Yes
Service Binding Based on Network Interfaces Yes
Yes
Encrypted Remote Replication  Yes
Yes
PC-less RAID Setup via LCD Panel for First-time Installation (Touch-N-Go) -
-
FIPS 140-2 Validated AES 256-bit Volume-based Encryption -
-
External Drive Encryption Yes
Yes
RAID Recovery Yes
Yes
Online RAID Capacity Expansion Yes
Yes
Online RAID Level Migration Yes
Yes
RAID10+ hot spare -
-
RAID10 Yes
Yes
RAID 6+ hot spare -
-
RAID 6 Yes
Yes
RAID 5+ Spare Yes
Yes
RAID 5 Yes
Yes
RAID 1 Yes
Yes
RAID 0 Yes
Yes
JBOD Yes
Yes
Single Disk Yes
Yes
Global Hot Spare Yes
Yes
NAS Discovery Tool QNAP Qfinder for Windows, Mac, and Linux
QNAP Qfinder for Windows, Mac, and Linux
iSCSI Target Yes
Yes
iSCSI LUN Snapshot/Backup Yes
Yes
Multi-LUN per Target Yes
Yes
LUN Mapping & LUN Masking Yes
Yes
MPIO (iSCSI) Yes
Yes
MC/S (iSCSI) Yes
Yes
Virtual Disk Drive (via iSCSI Initiator) Yes
Yes
Storage Plug & Connect (iSCSI & CIFS) Yes
Yes
File Station Yes
Yes
Shared Folder Level ACL Support Yes
Yes
Windows ACL Yes
Yes
Advanced Folder Permission with Subfolder ACL Support for CIFS/SMB, AFP, FTP and Web File Manager Yes
Yes
Real-time Remote Replication (RTRR) Yes
Yes
RTRR Max. Number of Jobs 8
8
Remote Replication Yes
Yes
Client backup software: NetBak Replicator (Windows) Yes
Yes
USB One-Touch-Copy Yes
Yes
Apple Time Machine Support Yes
Yes
Microsoft Active Directory (AD) Authentication Yes
Yes
LDAP Server Yes
Yes
LDAP Client Yes
Yes
Alert Notification (Email, SMS) Yes
Yes
Network Recycle Bin for file deletion via CIFS/SMB and AFP with retention time and file-type filter Yes
Yes
Wake on LAN (WOL) Yes
Yes
Schedule Power On/Off (15 settings) Yes
Yes
SNMP (v2 & v3) Yes
Yes
LCD Panel Configuration  -
-
UPS Support Yes
Yes
USB Printer (Max 3) Yes
Yes
Telnet login Yes
Yes
SSH login Yes
Yes
Photo Station Yes
Yes
Music Station Yes
Yes
iTunes Server Yes
Yes
HD Station -
-
XBMC Add-on -
-
TV Station Yes
Yes
AirPlay Yes
Yes
DLNA Media Server Yes
Yes
Download Station (BT/Magnet Link/HTTP/FTP download) Yes
Yes
Surveillance Station Pro Yes
Yes
Max Number of Cameras Default: 1, Max.: 8 (optional license purchase)
Default: 1, Max.: 8 (optional license purchase)
Mobile Surveillance App for iOS & Android Vmobile
Vmobile
Max USB Webcam for liveview or snapshot (QUSBCam QPKG) 1 (up to 640x480, 2FPS)
1 (up to 640x480, 2FPS)
Syslog Server Yes
Yes
Antivirus Yes
Yes
Mail Server Xmail (QPKG)
Xmail (QPKG)
VPN Server (PPTP + OpenVPN) Yes (Max clients: 15)
Yes (Max clients: 15)
myQNAPcloud Remote Access and File Sharing Yes
Yes
myQNAPcloud Connect Utility for Windows Yes
Yes
3rd Party Cloud Storage Amazon S3, ElephantDrive, Google Drive and Symform
Amazon S3, ElephantDrive, Google Drive and Symform
Mobile Apps for iOS & Android Qfile, Qmanager, Qmobile
Qfile, Qmanager, Qmobile
VMware Ready® -
-
Citrix Ready -
-
Microsoft Hyper-V Compatibility -
-
FCC Yes
Yes
CE Yes
Yes
Max. Number of Users 4096
4096
Max. Number of User Groups 512
512
Max. Number of Share Folders 512
512
Max. Number of Concurrent Connections 256
256
Language English, German, French, Italian, Spanish, Polish, Swedish, Danish, Norwegian, Finnish, Russian, Japanese, Korean, Dutch, Czech, Traditional Chinese, Simplified Chinese, Turkish, Hugarian, Romanian, Thai, Portuguese/Brazil, Greek
English, German, French, Italian, Spanish, Polish, Swedish, Danish, Norwegian, Finnish, Russian, Japanese, Korean, Dutch, Czech, Traditional Chinese, Simplified Chinese, Turkish, Hugarian, Romanian, Thai, Portuguese/Brazil, Greek