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Product comparison · 2 nas & storage servers

Lenovo EMC px4-400d vs QNAP TS-421U + 4x 2TBWDRED

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  • 40specifications compared
  • 21differ
  • 19identical
  • 42known for one product only

Key differences

  • Storage drives installed
    • No
    • Yes
  • Total installed storage capacity
    • 0 TB
    • 8 TB
  • Number of storage drives installed
    • 0
    • 4
  • Storage drive capacity
    • 0 GB
    • 2 TB
  • Storage drive interface
    • Serial ATA III
    • Serial ATA, Serial ATA II
  • Storage drive size
    • 3.5"
    • 2.5/3.5"
  • RAID levels
    • 0, 1, 5, 10
    • 0, 1, 5, 6, 10, JBOD
  • Processor family
    • Intel Atom®
    • Marvell

Side by side

Differences highlightedShow differences only
82 specifications
A

Lenovo

EMC px4-400dView product
B

QNAP

TS-421U + 4x 2TBWDREDView product
Storage7 differ
Storage drives installedDiffersNoYes
Total installed storage capacityDiffers0 TB8 TB
Number of storage drives installedDiffers04
Number of storage drives supported44
Installed storage drive typeKnown for oneHDD
Supported storage drive typesHDDHDD
Storage drive capacityDiffers0 GB2 TB
Storage drive interfaceDiffersSerial ATA IIISerial ATA, Serial ATA II
Storage drive sizeDiffers3.5"2.5/3.5"
RAID supportYesYes
RAID levelsDiffers0, 1, 5, 100, 1, 5, 6, 10, JBOD
Hot-swap drive baysYesYes
Maximum supported storage capacityKnown for one16 TB
Processor2 differ
Processor familyDiffersIntel Atom®Marvell
Processor frequencyDiffers2.13 GHz2 GHz
Processor modelKnown for oneD2701
Processor coresKnown for one2
L2 cacheKnown for one1 MB
Memory1 differ
Internal memoryDiffers2 GB1 GB
Internal memory typeDDR3DDR3
Flash memoryKnown for one512 MB
Maximum RAM supportedKnown for one2 GB
Memory slotsKnown for one1
Network1 differ
Ethernet LANYesYes
Ethernet LAN data rates10,100,1000 Mbit/s10,100,1000 Mbit/s
Wi-FiNoNo
DHCP clientKnown for oneYes
DHCP serverKnown for oneYes
Jumbo frames supportKnown for oneYes
iSCSI supportYesYes
Wake-on-LAN readyYesYes
Supported network protocolsDiffersCIFS/SMB/Rally (Microsoft), NFS (Linux/UNIX), AFP Bonjour (Apple), FTP, SFTP, TFTP, HTTP, HTTPS, WebDAV, Windows DFS, SNMPCIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC
Ports & interfaces3 differ
Ethernet LAN (RJ-45) ports22
USB 2.0 ports quantityDiffers42
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers12
Fiber ports quantity00
eSATA ports quantityDiffers12
HDMI ports quantityKnown for one1
Serial ports quantityKnown for one1
Design1 differ
Chassis typeDiffersDesktopRack (1U)
Cooling typeActiveActive
Product colourBlackBlack
Number of fansKnown for one2 fan(s)
Fan diameterKnown for one4 cm
LED indicatorsKnown for oneHDD, LAN, Status, USB
Cable lock slotKnown for oneYes
Cable lock slot typeKnown for oneKensington
Built-in displayKnown for oneYes
Display typeKnown for oneLCD
Performance1 differ
TypeNASNAS
Device classSmall & Medium BusinessSmall & Medium Business
Backup functionYesYes
BuzzerKnown for oneYes
Multilingual supportKnown for oneYes
Number of usersDiffers75 user(s)4096 user(s)
On/off switchKnown for oneYes
Reset buttonKnown for oneYes
Security algorithmsKnown for oneHTTPS, SSH, SSL/TLS
Noise levelKnown for one35 dB
Software3 differ
Operating system installedDiffersEMC LifeLineQNAP Turbo System
Windows operating systems supportedDiffersWindows 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 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 P
Linux operating systems supportedYesYes
Mac operating systems supportedDiffersMac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain LionYes
Server operating systems supportedKnown for oneWindows 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 supportedKnown for oneAndroid
Poweridentical
Power supply locationBuilt-inBuilt-in
Power supply unit (PSU) capacityKnown for one250 W
Number of power supply unitsKnown for one1
AC input voltageKnown for one100-240 V
AC input frequencyKnown for one50 - 60 Hz
Fan voltageKnown for one12 V
Power consumption (typical)Known for one55 W
Weight & dimensionsidentical
WidthKnown for one439 mm
DepthKnown for one483 mm
HeightKnown for one44 mm
Packaging contentidentical
External power adapterKnown for oneNo
Cables includedKnown for oneAC, LAN (RJ-45)
Quick installation guideKnown for oneYes
Operational conditions2 differ
Operating temperature (T-T)Differs10 - 40 °C0 - 40 °C
Operating relative humidity (H-H)Differs8 - 85%5 - 95%
Storage relative humidity (H-H)Known for one5 - 95%
Storage temperature (T-T)Known for one-40 - 60 °C

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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