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TS-251+

Brand: QNAP
SKU: TS-251+-2G/4TB-REDPRO
Conditions: New
Availability:
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Storage
Total installed storage capacity4 TB
Online RAID migrationYes
Online RAID expansionYes
Bad block scanYes
Storage drives installedYes
Installed storage drive typeHDD
Supported storage drive typesHDD & SSD
Number of storage drives supported2
Hot-swap drive baysYes
RAID supportYes
Supported file systemsFAT32-HFS+-NTFS-exFAT-ext3-ext4
RAID levels0-1-JBOD
Supported storage drive interfacesSerial ATA II- Serial ATA III
Storage drive sizes supported2.5-3.5"
Processor
Processor frequency2 GHz
Processor familyIntel® Celeron®
Processor cores4
Memory
Internal memory typeDDR3L
Internal memory2 GB
Memory clock speed1600 MHz
Maximum RAM supported8 GB
Memory slots2x SODIMM
Flash memory512 MB
Network
Link aggregationYes
Dynamic DNS (DDNS)Yes
Ethernet LANYes
Ethernet LAN data rates10-100-1000 Mbit/s
Wi-FiNo
Wake-on-LAN readyYes
Supported network protocolsCIFS/SMB- AFP v3.3- NFS v3- FTP- FTPS- SFTP- TFTP- HTTP(S)- Telnet- SSH- iSCSI- SNMP- SMTP- SMSC
Jumbo frames supportYes
iSCSI supportYes
DHCP serverYes
DHCP clientYes
Ports & interfaces
USB portYes
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
USB 2.0 ports quantity2
HDMI ports quantity1
Ethernet LAN (RJ-45) ports2
Hard drive
RAID supportYes
Supported file systemsFAT32-HFS+-NTFS-exFAT-ext3-ext4
RAID levels0-1-JBOD
Design
Cooling typeActive
Fan diameter7 cm
Cable lock slot typeKensington
Product colourBlack
Number of fans1 fan(s)
LED indicatorsHDD- LAN- Power- Status- USB
Chassis typeTower
Cable lock slotYes
Technical details
TypeNAS
Device classHome & Home Office
Backup functionYes
Backup featuresCloud- USB drive- iSCSI LUN
Product colourBlack
Noise level15.4 dB
LED indicatorsHDD- LAN- Power- Status- USB
Chassis typeTower
BuzzerYes
Number of simultaneous users4096 user(s)
Number of fans1 fan(s)
Performance
Built-in iTunes serverYes
Built-in FTP serverYes
System logYes
Share folder access right managementYes
Share folder512
S.M.A.R.T. supportYes
Browser supportedApple Safari 7+- Google Chrome- Microsoft Internet Explorer 10+- Mozilla Firefox
Mac compatibilityYes
Remotely operatedYes
Backup buttonYes
Universal Plug and Play (UPnP)Yes
TypeNAS
Device classHome & Home Office
Backup functionYes
Backup featuresCloud- USB drive- iSCSI LUN
On/off switchYes
Windows operating systems supportedWindows 10-Windows 10 Education-Windows 10 Education x64-Windows 10 Enterprise-Windows 10 Enterprise x64-Windows 10 Home-Windows 10 Home x64-Windows 10 IOT Core-Windows 10 Pro-Windows 10 Pro x64-Windows 7-Windows 7 Enterprise-Windows 7 Enterprise x64-Windows 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 7 x64-Windows 8-Windows 8 Enterprise-Windows 8 Enterprise x64-Windows 8 Pro-Windows 8 Pro x64-Windows 8 x64
Server operating systems supportedWindows Server 2003-Windows Server 2008 R2-Windows Server 2012-Windows Server 2012 R2-Windows Server 2016
Mac operating systems supportedMac OS X 10.7 Lion-Mac OS X 10.8 Mountain Lion-Mac OS X 10.9 Mavericks
Linux operating systems supportedYes
Web-based managementYes
Security algorithms256-bit AES-FIPS 140-2-HTTPS-SSH
Reset buttonYes
Operating system version4.3
Operating system installedQNAP Turbo System
Noise level15.4 dB
Management protocolsSNMP
BuzzerYes
SnapshotYes
Cooling
Cooling typeActive
Fan diameter7 cm
Fan voltage12 V
Number of fans1 fan(s)
Security
Cable lock slot typeKensington
Security algorithms256-bit AES-FIPS 140-2-HTTPS-SSH
Cable lock slotYes
Software
Mac compatibilityYes
Windows operating systems supportedWindows 10-Windows 10 Education-Windows 10 Education x64-Windows 10 Enterprise-Windows 10 Enterprise x64-Windows 10 Home-Windows 10 Home x64-Windows 10 IOT Core-Windows 10 Pro-Windows 10 Pro x64-Windows 7-Windows 7 Enterprise-Windows 7 Enterprise x64-Windows 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 7 x64-Windows 8-Windows 8 Enterprise-Windows 8 Enterprise x64-Windows 8 Pro-Windows 8 Pro x64-Windows 8 x64
Server operating systems supportedWindows Server 2003-Windows Server 2008 R2-Windows Server 2012-Windows Server 2012 R2-Windows Server 2016
Mac operating systems supportedMac OS X 10.7 Lion-Mac OS X 10.8 Mountain Lion-Mac OS X 10.9 Mavericks
Linux operating systems supportedYes
Operating system version4.3
Operating system installedQNAP Turbo System
Management features
On/off switchYes
Web-based managementYes
Reset buttonYes
Management protocolsSNMP
Power
Power consumption (HDD standby)10.56 W
Power supply locationExternal
Power supply unit (PSU) capacity60 W
Fan voltage12 V
AC input voltage100 - 240 V
Power consumption (typical)18.09 W
Power consumption (sleep)0.57 W
External power adapterYes
Weight & dimensions
Width102 mm
Depth219 mm
Height169 mm
Weight1.28 kg
Package weight2.32 kg
Packaging content
Number of screws14
Handheld remote controlYes
Quick installation guideYes
External power adapterYes
Cables includedAC- LAN (RJ-45)
System requirements
Windows operating systems supportedWindows 10-Windows 10 Education-Windows 10 Education x64-Windows 10 Enterprise-Windows 10 Enterprise x64-Windows 10 Home-Windows 10 Home x64-Windows 10 IOT Core-Windows 10 Pro-Windows 10 Pro x64-Windows 7-Windows 7 Enterprise-Windows 7 Enterprise x64-Windows 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 7 x64-Windows 8-Windows 8 Enterprise-Windows 8 Enterprise x64-Windows 8 Pro-Windows 8 Pro x64-Windows 8 x64
Server operating systems supportedWindows Server 2003-Windows Server 2008 R2-Windows Server 2012-Windows Server 2012 R2-Windows Server 2016
Mac operating systems supportedMac OS X 10.7 Lion-Mac OS X 10.8 Mountain Lion-Mac OS X 10.9 Mavericks
Linux operating systems supportedYes
Operational conditions
Operating temperature (T-T)0 - 40 °C
Operating relative humidity (H-H)5 - 95%
Packaging data
Package weight2.32 kg
Cables includedAC- LAN (RJ-45)
Other features
Number of simultaneous users4096 user(s)
TS-251+
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