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Product comparison · 2 nas & storage servers

QNAP TS-420U 4x3TB vs QNAP TS-421U 2x2TB

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  • 64specifications compared
  • 6differ
  • 58identical
  • 0known for one product only

Key differences

  • Total installed storage capacity
    • 12 TB
    • 4 TB
  • Number of storage drives installed
    • 4
    • 2
  • Storage drive capacity
    • 3 TB
    • 2 TB
  • Processor frequency
    • 1.6 GHz
    • 2 GHz
  • Power consumption (typical)
    • 29 W
    • 33 W
  • Power consumption (sleep)
    • 15 W
    • 12 W

Side by side

Differences highlightedShow differences only
64 specifications
A

QNAP

TS-420U 4x3TBView product
B

QNAP

TS-421U 2x2TBView product
Storage3 differ
Total installed storage capacityDiffers12 TB4 TB
Number of storage drives installedDiffers42
Number of storage drives supported44
Storage drive capacityDiffers3 TB2 TB
Storage drive interfaceSerial ATA, Serial ATA IISerial ATA, Serial ATA II
Storage drive size2.5/3.5"2.5/3.5"
Maximum supported storage capacity12 TB12 TB
RAID supportYesYes
RAID levels0, 1, 5, 5+0, 5+1, 6, 10, JBOD0, 1, 5, 5+0, 5+1, 6, 10, JBOD
Supported file systemsext3, ext4, FAT32, HFS+, NTFSext3, ext4, FAT32, HFS+, NTFS
Processor1 differ
Processor familyMarvellMarvell
Processor frequencyDiffers1.6 GHz2 GHz
Number of processors installed11
Memoryidentical
Internal memory1 GB1 GB
Internal memory typeDDR3DDR3
Flash memory16 MB16 MB
Networkidentical
Ethernet LANYesYes
Ethernet LAN data rates10,100,1000 Mbit/s10,100,1000 Mbit/s
Wi-FiNoNo
DHCP serverYesYes
Jumbo frames supportYesYes
iSCSI supportYesYes
Wake-on-LAN readyYesYes
Compliance industry standards802.3, 802.3u, 802.3ab802.3, 802.3u, 802.3ab
Cabling technology10/100/1000Base-T(X)10/100/1000Base-T(X)
Supported network protocolsTCP/ IPTCP/ IP
Ports & interfacesidentical
Ethernet LAN (RJ-45) ports22
USB 2.0 ports quantity22
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity22
Fiber ports quantity00
eSATA ports quantity22
eSATAYesYes
Designidentical
Chassis typeRack (1U)Rack (1U)
Product colourBlackBlack
Number of fans2 fan(s)2 fan(s)
LED indicatorsHDD, LAN, Status, USBHDD, LAN, Status, USB
Cable lock slotYesYes
Cable lock slot typeKensingtonKensington
Performanceidentical
BuzzerYesYes
Multilingual supportYesYes
Number of users4096 user(s)4096 user(s)
Management protocolsSNMP (v2/v3)SNMP (v2/v3)
Access Control List (ACL)YesYes
On/off switchYesYes
Reset buttonYesYes
Security algorithmsHTTPS, SSL/TLSHTTPS, SSL/TLS
Softwareidentical
Operating system installedLinuxLinux
Windows operating systems supportedWindows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, WinWindows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Win
Linux operating systems supportedYesYes
Mac operating systems supportedYesYes
Server operating systems supportedWindows Server 2003, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012Windows Server 2003, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012
Power2 differ
Power consumption (typical)Differs29 W33 W
Power consumption (sleep)Differs15 W12 W
AC input voltage100-240 V100-240 V
AC input frequency50 - 60 Hz50 - 60 Hz
Output power250 W250 W
Weight & dimensionsidentical
Width483 mm483 mm
Depth439 mm439 mm
Height44 mm44 mm
Weight6.7 kg6.7 kg
Package weight11.1 kg11.1 kg
Packaging contentidentical
External power adapterYesYes
Operational conditionsidentical
Operating temperature (T-T)0 - 40 °C0 - 40 °C
Operating relative humidity (H-H)0 - 90%0 - 90%

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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