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Product comparison · 2 nas & storage servers

QNAP TS-221 2x2TB vs QNAP TS-421U 2x2TB

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  • 60specifications compared
  • 17differ
  • 43identical
  • 4known for one product only

Key differences

  • Number of storage drives supported
    • 2
    • 4
  • Maximum supported storage capacity
    • 6 TB
    • 12 TB
  • Ethernet LAN (RJ-45) ports
    • 1
    • 2
  • USB 2.0 ports quantity
    • 1
    • 2
  • Chassis type
    • Tower
    • Rack (1U)
  • Number of fans
    • 1 fan(s)
    • 2 fan(s)
  • LED indicators
    • eSATA, HDD, LAN, Power, USB
    • HDD, LAN, Status, USB
  • Number of users
    • 2048 user(s)
    • 4096 user(s)

Side by side

Differences highlightedShow differences only
64 specifications
A

QNAP

TS-221 2x2TBView product
B

QNAP

TS-421U 2x2TBView product
Storage3 differ
Total installed storage capacity4 TB4 TB
Number of storage drives installed22
Number of storage drives supportedDiffers24
Storage drive capacity2 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 capacityDiffers6 TB12 TB
RAID supportYesYes
RAID levelsDiffers0, 10, 1, 5, 5+0, 5+1, 6, 10, JBOD
Supported file systemsext3, ext4, FAT32, HFS+, NTFSext3, ext4, FAT32, HFS+, NTFS
Processoridentical
Processor familyMarvellMarvell
Processor frequency2 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 readyKnown for oneYes
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 & interfaces2 differ
Ethernet LAN (RJ-45) portsDiffers12
USB 2.0 ports quantityDiffers12
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity22
Fiber ports quantity00
eSATA ports quantity22
eSATAKnown for oneYes
Design3 differ
Chassis typeDiffersTowerRack (1U)
Product colourBlackBlack
Number of fansDiffers1 fan(s)2 fan(s)
LED indicatorsDifferseSATA, HDD, LAN, Power, USBHDD, LAN, Status, USB
Cable lock slotYesYes
Cable lock slot typeKensingtonKensington
Performance2 differ
BuzzerYesYes
Multilingual supportYesYes
Number of usersDiffers2048 user(s)4096 user(s)
Management protocolsSNMP (v2/v3)SNMP (v2/v3)
Access Control List (ACL)YesYes
On/off switchYesYes
Reset buttonYesYes
Security algorithmsDiffersSSL/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)Differs19 W33 W
Power consumption (sleep)Differs7 W12 W
AC input voltage100-240 V100-240 V
AC input frequencyKnown for one50 - 60 Hz
Output powerKnown for one250 W
Weight & dimensions5 differ
WidthDiffers102 mm483 mm
DepthDiffers216 mm439 mm
HeightDiffers150 mm44 mm
WeightDiffers1.74 kg6.7 kg
Package weightDiffers2.92 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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