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Product comparison · 2 nas & storage servers

QNAP TS-420 + 4x 1TBWDRED vs QNAP TS-421U + 4x 1TBWDRED

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  • 66specifications compared
  • 13differ
  • 53identical
  • 5known for one product only

Key differences

  • Supported storage drive types
    • HDD & SSD
    • HDD
  • Processor frequency
    • 1.6 GHz
    • 2 GHz
  • Internal memory
    • 0.512 GB
    • 1 GB
  • Chassis type
    • Tower
    • Rack (1U)
  • Fan diameter
    • 9 cm
    • 4 cm
  • Device class
    • Home & Home Office
    • Small & Medium Business
  • Power supply location
    • External
    • Built-in
  • Power supply unit (PSU) capacity
    • 36 W
    • 250 W

Side by side

Differences highlightedShow differences only
71 specifications
A

QNAP

TS-420 + 4x 1TBWDREDView product
B

QNAP

TS-421U + 4x 1TBWDREDView product
Storage1 differ
Storage drives installedYesYes
Total installed storage capacity4 TB4 TB
Number of storage drives installed44
Number of storage drives supported44
Installed storage drive typeHDDHDD
Supported storage drive typesDiffersHDD & SSDHDD
Storage drive capacity1 TB1 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 capacityKnown for one16 TB
RAID supportYesYes
RAID levels0, 1, 5, 6, 10, JBOD0, 1, 5, 6, 10, JBOD
Hot-swap drive baysYesYes
Processor1 differ
Processor familyMarvellMarvell
Processor frequencyDiffers1.6 GHz2 GHz
Memory1 differ
Internal memoryDiffers0.512 GB1 GB
Internal memory typeDDR3DDR3
Flash memory16 MB16 MB
Network1 differ
Ethernet LANYesYes
Ethernet LAN data rates10,100,1000 Mbit/s10,100,1000 Mbit/s
Wi-FiNoNo
DHCP clientYesYes
DHCP serverYesYes
Jumbo frames supportYesYes
iSCSI supportYesYes
Wake-on-LAN readyYesYes
Supported network protocolsDiffersCIFS/SMB, AFP (v3.3), NFS (v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSCCIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC
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
Design2 differ
Chassis typeDiffersTowerRack (1U)
Cooling typeActiveActive
Product colourBlackBlack
Number of fans1 fan(s)1 fan(s)
Fan diameterDiffers9 cm4 cm
LED indicatorsHDD, LAN, Status, USBHDD, LAN, Status, USB
Cable lock slotYesYes
Cable lock slot typeKensingtonKensington
Performance1 differ
TypeNASNAS
Device classDiffersHome & Home OfficeSmall & Medium Business
Backup functionYesYes
BuzzerYesYes
Multilingual supportYesYes
Number of users4096 user(s)4096 user(s)
On/off switchYesYes
Reset buttonYesYes
Security algorithmsKnown for oneHTTPS, SSH, SSL/TLS
Softwareidentical
Operating system installedQNAP Turbo SystemQNAP Turbo System
Operating system versionKnown for one4.0
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 2003 R2, Windows Server 2003 x64, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 x64, Windows Server 2012, Windows Server 2012 R2Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 x64, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 x64, Windows Server 2012, Windows Server 2012 R2
Other operating systems supportedAndroidAndroid
Power2 differ
Power supply locationDiffersExternalBuilt-in
Power supply unit (PSU) capacityDiffers36 W250 W
Number of power supply units11
AC input voltage100-240 V100-240 V
AC input frequency50 - 60 Hz50 - 60 Hz
Fan voltage12 V12 V
Weight & dimensions3 differ
WidthDiffers180 mm439 mm
DepthDiffers235 mm483 mm
HeightDiffers177 mm44 mm
Packaging content1 differ
External power adapterDiffersYesNo
Cables includedAC, LAN (RJ-45)AC, LAN (RJ-45)
Quick installation guideKnown for oneYes
Operational conditionsidentical
Operating temperature (T-T)0 - 40 °C0 - 40 °C
Operating relative humidity (H-H)5 - 95%5 - 95%
Other featuresidentical
Compliance certificatesKnown for oneRoHS

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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