Product comparison · 2 nas & storage servers

QNAP HS-251-2G NAS Compact Intel® Celeron® vs QNAP TS-851 + 8X ST2000NC000

57specifications compared
17differ
40identical
23known for one product only

Key differences

Storage drives installed
- HS-251-2G NAS Compact Intel® Celeron®:No
- TS-851 + 8X ST2000NC000:Yes
Total installed storage capacity
- HS-251-2G NAS Compact Intel® Celeron®:0 TB
- TS-851 + 8X ST2000NC000:16 TB
Number of storage drives installed
- HS-251-2G NAS Compact Intel® Celeron®:0
- TS-851 + 8X ST2000NC000:8
Number of storage drives supported
- HS-251-2G NAS Compact Intel® Celeron®:2
- TS-851 + 8X ST2000NC000:8
Installed storage drive type
- HS-251-2G NAS Compact Intel® Celeron®:No
- TS-851 + 8X ST2000NC000:HDD
RAID levels
- HS-251-2G NAS Compact Intel® Celeron®:0, 1, JBOD
- TS-851 + 8X ST2000NC000:0, 1, 5, 6, 10, JBOD
Internal memory
- HS-251-2G NAS Compact Intel® Celeron®:2 GB
- TS-851 + 8X ST2000NC000:1 GB
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity
- HS-251-2G NAS Compact Intel® Celeron®:2
- TS-851 + 8X ST2000NC000:3

Side by side

Differences highlightedShow differences only

Comparison of HS-251-2G, TS-851 + 8X ST2000NC000
80 specifications	A QNAP HS-251-2G NAS Compact Intel® Celeron® Model HS-251-2G View product	B QNAP TS-851 + 8X ST2000NC000 View product
Storage6 differ
Storage drives installedDiffers	No	Yes
Total installed storage capacityDiffers	0 TB	16 TB
Number of storage drives installedDiffers	0	8
Number of storage drives supportedDiffers	2	8
Installed storage drive typeDiffers	No	HDD
Supported storage drive types	HDD & SSD	HDD & SSD
Storage drive interface	Serial ATA II, Serial ATA III	Serial ATA II, Serial ATA III
Storage drive size	2.5/3.5"	2.5/3.5"
RAID support	Yes	Yes
RAID levelsDiffers	0, 1, JBOD	0, 1, 5, 6, 10, JBOD
Hot-swap drive bays	Yes	Yes
Supported file systems	ext3, ext4, FAT32, HFS+, NTFS	ext3, ext4, FAT32, HFS+, NTFS
Storage drive capacityKnown for one	Unknown — not stated by the source	2 TB
Processoridentical
Processor family	Intel® Celeron®	Intel® Celeron®
Processor frequency	2.41 GHz	2.41 GHz
Processor cores	2	2
Memory1 differ
Internal memoryDiffers	2 GB	1 GB
Internal memory type	DDR3L	DDR3L
Flash memory	512 MB	512 MB
Maximum RAM supportedKnown for one	Unknown — not stated by the source	8 GB
Memory slotsKnown for one	Unknown — not stated by the source	2
Network1 differ
Ethernet LAN	Yes	Yes
Ethernet LAN data rates	10,100,1000 Mbit/s	10,100,1000 Mbit/s
DHCP client	Yes	Yes
DHCP server	Yes	Yes
Jumbo frames support	Yes	Yes
iSCSI support	Yes	Yes
Wake-on-LAN ready	Yes	Yes
Supported network protocolsDiffers	CIFS/SMB,AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC	CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC
Wi-FiKnown for one	Unknown — not stated by the source	No
Ports & interfaces1 differ
Ethernet LAN (RJ-45) ports	2	2
USB 2.0 ports quantity	2	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	2	3
Fiber ports quantity	0	0
HDMI ports quantity	1	1
Design2 differ
Chassis typeDiffers	Compact	Tower
Cooling typeDiffers	Passive	Active
Product colour	Black	Black
LED indicators	Yes	Yes
Built-in displayKnown for one	No	Unknown — not stated by the source
Cable lock slot	Yes	Yes
Cable lock slot type	Kensington	Kensington
Number of fansKnown for one	Unknown — not stated by the source	2 fan(s)
Fan diameterKnown for one	Unknown — not stated by the source	12 cm
Performance2 differ
Type	NAS	NAS
Device class	Home & Home Office	Home & Home Office
Backup function	Yes	Yes
Backup featuresKnown for one	Cloud	Unknown — not stated by the source
BuzzerKnown for one	Yes	Unknown — not stated by the source
Multilingual supportKnown for one	Yes	Unknown — not stated by the source
Built-in optical driveKnown for one	No	Unknown — not stated by the source
Card reader integratedKnown for one	No	Unknown — not stated by the source
Management protocolsDiffers	SNMP	SNMP, Telnet
Web-based management	Yes	Yes
Access Control List (ACL)	Yes	Yes
On/off switch	Yes	Yes
Reset button	Yes	Yes
Security algorithmsDiffers	256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLS	FIPS 140-2, HTTPS, SSH, SSL/TLS
Softwareidentical
Operating system installed	QNAP Turbo System	QNAP Turbo System
Operating system version	4.1	4.1
Windows operating systems supportedKnown for one	Yes	Unknown — not stated by the source
Linux operating systems supportedKnown for one	Yes	Unknown — not stated by the source
Mac operating systems supportedKnown for one	Yes	Unknown — not stated by the source
Poweridentical
AC input voltage	100-240 V	100-240 V
Power supply locationKnown for one	Unknown — not stated by the source	Built-in
Power supply unit (PSU) capacityKnown for one	Unknown — not stated by the source	350 W
Number of power supply unitsKnown for one	Unknown — not stated by the source	1
AC input frequencyKnown for one	Unknown — not stated by the source	50 - 60 Hz
Fan voltageKnown for one	Unknown — not stated by the source	12 V
Weight & dimensions3 differ
WidthDiffers	302 mm	298.2 mm
DepthDiffers	220 mm	235.4 mm
HeightDiffers	41.3 mm	185.2 mm
WeightKnown for one	1.56 kg	Unknown — not stated by the source
Packaging content1 differ
External power adapterKnown for one	Yes	Unknown — not stated by the source
Cables includedDiffers	LAN (RJ-45)	AC, LAN (RJ-45)
Quick installation guide	Yes	Yes
Operational conditionsidentical
Operating temperature (T-T)	0 - 40 °C	0 - 40 °C
Operating relative humidity (H-H)	5 - 95%	5 - 95%
Other featuresidentical
Digital Living Network Alliance (DLNA) certified	Yes	Yes
Power managementKnown for one	Yes	Unknown — not stated by the source

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.

More nas & storage servers comparisons

All nas & storage servers comparisons