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Product comparison · 2 nas & storage servers

QNAP TS-421 + 4x 3TBWDRED vs QNAP TS-421U + 4x 1TBWDRED

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  • 68specifications compared
  • 13differ
  • 55identical
  • 0known for one product only

Key differences

The QNAP TS-421 + 4x 3TBWDRED has 8 TB more total installed storage capacity than the QNAP TS-421U + 4x 1TBWDRED (12 TB vs 4 TB). The QNAP TS-421 + 4x 3TBWDRED has 2 TB more storage drive capacity than the QNAP TS-421U + 4x 1TBWDRED (3 TB vs 1 TB). The QNAP TS-421 + 4x 3TBWDRED has 5 cm more fan diameter than the QNAP TS-421U + 4x 1TBWDRED (9 cm vs 4 cm). Only the QNAP TS-421 + 4x 3TBWDRED has external power adapter. Supported storage drive types: HDD & SSD on the QNAP TS-421 + 4x 3TBWDRED, HDD on the QNAP TS-421U + 4x 1TBWDRED.

  • Total installed storage capacity
    • 12 TB
    • 4 TB
  • Supported storage drive types
    • HDD & SSD
    • HDD
  • Storage drive capacity
    • 3 TB
    • 1 TB
  • Chassis type
    • Tower
    • Rack (1U)
  • Fan diameter
    • 9 cm
    • 4 cm
  • LED indicators
    • eSATA, HDD, LAN, Status, USB
    • HDD, LAN, Status, USB
  • Device class
    • Home & Home Office
    • Small & Medium Business
  • Power supply location
    • External
    • Built-in

Side by side

Differences highlightedShow differences only
68 specifications
A

QNAP

TS-421 + 4x 3TBWDREDView product
B

QNAP

TS-421U + 4x 1TBWDREDView product
Storage3 differ
Storage drives installedYesYes
Total installed storage capacityDiffers12 TB4 TB
Number of storage drives installed44
Number of storage drives supported44
Installed storage drive typeHDDHDD
Supported storage drive typesDiffersHDD & SSDHDD
Storage drive capacityDiffers3 TB1 TB
Storage drive interfaceSerial ATA, Serial ATA IISerial ATA, Serial ATA II
Storage drive size2.5/3.5"2.5/3.5"
RAID supportYesYes
RAID levels0, 1, 5, 6, 10, JBOD0, 1, 5, 6, 10, JBOD
Hot-swap drive baysYesYes
Processoridentical
Processor familyMarvellMarvell
Processor frequency2 GHz2 GHz
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 clientYesYes
DHCP serverYesYes
Jumbo frames supportYesYes
iSCSI supportYesYes
Wake-on-LAN readyYesYes
Supported network protocolsCIFS/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
Design3 differ
Chassis typeDiffersTowerRack (1U)
Cooling typeActiveActive
Product colourBlackBlack
Number of fans1 fan(s)1 fan(s)
Fan diameterDiffers9 cm4 cm
LED indicatorsDifferseSATA, HDD, 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 algorithmsHTTPS, SSH, SSL/TLSHTTPS, SSH, SSL/TLS
Softwareidentical
Operating system installedQNAP Turbo SystemQNAP Turbo System
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 guideYesYes
Operational conditionsidentical
Operating temperature (T-T)0 - 40 °C0 - 40 °C
Operating relative humidity (H-H)5 - 95%5 - 95%

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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