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Comparison of QNAP TS-251+ and Asustor AS6212RD

The side-by-side comparison of the devices’ specifications. The comparison table below makes it easier to choose the most fitting NAS.

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Adding/changing a NAS
QNAP TS-251+ (TS-251P)
QNAP TS-251+ (TS-251P)
Asustor AS6212RD (AS6212RD)
Asustor AS6212RD (AS6212RD)
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Launch 2015 2016
Class Small office / Home office Small / Medium business
Body
Dimensions 169 x 102 x 219 mm 88 x 439 x 535 mm
Weight 1.28 kg 12.7 kg
Disks
Disk bays 2 x 3.5" SATA III 12 x 3.5" SATA III
RAID JBOD
RAID0
RAID1
JBOD
RAID0
RAID1
RAID10
RAID5
RAID6
SSD support yes yes
Network
LAN ports 2 x Gigabit Ethernet 4 x Gigabit Ethernet
Wireless yes, with USB dongle yes, with USB dongle
Protocols AFP
CIFS/SMB
FTP
ISCSI
SFTP
WEBDAV
AFP
CIFS/SMB
FTP
ISCSI
NFS
RSYNC
SFTP
WEBDAV
P2P support BitTorrent BitTorrent
Media server DLNA
UPnP
iTunes
DLNA
UPnP
iTunes
Cloud backup Amazon S3
Box
Dropbox
Google Drive
Microsoft OneDrive
Amazon S3
Dropbox
Google Drive
HiDrive
Microsoft OneDrive
Connectivity
USB ports 2 x USB 2.0
2 x USB 3.0
4 x USB 3.0
eSATA ports no no
System
CPU Intel Celeron J1900 quad-core @ 2 GHz Intel Celeron J3160 quad-core @ 1.6 GHz
RAM 2 GB (upgradable) 4 GB DDR3 (upgradable)
Flash 512 MB
Operating system QNAP QTS Asustor ADM
Alternative OS
Power
Power supply 12 V / 5 A 350 W, internal
Consuption 18.09 W / 10.56 W 94.6 W / 52 W
Fans 1 x 70 mm 2 x 60 mm
Noise level 15.4 dB(A)
Features
Specials Failover and link aggregation
HDMI output
Infrared receiver
HDMI output
Redundant power supply
Administration
Default IP DHCP DHCP
Default username admin admin
Default password admin admin

A maximum of 3 devices can be compared at the same time. To add or change a NAS, type the name of the NAS you’re looking for in the search field of the table’s column, then click on the device’s name in the drop-down list of search results.

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