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Comparison of Promise SmartStor Zero and QNAP TS-251A

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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Promise SmartStor Zero (SSZERO)
Promise SmartStor Zero (SSZERO)
QNAP TS-251A (TS-251A)
QNAP TS-251A (TS-251A)
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Launch 2013 2016
Class Low end Small office / Home office
Body
Dimensions 92 x 145 x 213 mm 169 x 102 x 219 mm
Weight 950 g 1.28 kg
Disks
Disk bays 2 x 3.5" SATA II 2 x 3.5" SATA III
RAID JBOD
RAID0
RAID1
JBOD
RAID0
RAID1
SSD support no yes
Network
LAN ports 1 x Gigabit Ethernet 2 x Gigabit Ethernet
Wireless no yes, with USB dongle
Protocols AFP
CIFS/SMB
NFS
AFP
CIFS/SMB
FTP
ISCSI
NFS
SFTP
WEBDAV
P2P support no BitTorrent
Media server DLNA
UPnP
iTunes
DLNA
UPnP
iTunes
Cloud backup no Amazon S3
Box
Dropbox
Google Drive
Microsoft OneDrive
Connectivity
USB ports 1 x USB 2.0 3 x USB 3.0
eSATA ports no no
System
CPU Freescale MPC8315 @ 400 MHz Intel Celeron N3060 dual-core @ 1.6 GHz
RAM 128 MB 2 GB (upgradable)
Flash 64 MB 4 GB
Operating system Promise SmartNAVI 2.0 QNAP QTS
Alternative OS    
Power
Power supply 12 V / 5 A 12 V / 5.4 A
Consuption   16.2 W / 7.9 W
Fans 1 x 60 mm 1 x 70 mm
Noise level   18.3 dB(A)
Features
Specials Zero Configuration Failover and link aggregation
HDMI output
Infrared receiver
Audio input
Audio output
Administration
Default IP DHCP DHCP
Default username admin admin
Default password admin admin

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