QNAP TS-239 PRO II+ 2TB vs QNAP TS-239 PRO II+ 4TB

Comparison of TS-239 PRO II+ 2TB, TS-239 PRO II+ 4TB

42 specifications	A QNAP TS-239 PRO II+ 2TBView product	B QNAP TS-239 PRO II+ 4TBView product
Storage1 differ
Total installed storage capacityDiffers	2 TB	4 TB
Number of storage drives supported	2	2
Storage drive interface	Serial ATA	Serial ATA
Storage drive size	3.5"	3.5"
RAID levels	0, 1, JBOD	0, 1, JBOD
Supported file systems	EXT3, EXT4, FAT32, HFS+, NTFS	EXT3, EXT4, FAT32, HFS+, NTFS
Processoridentical
Processor family	Intel Atom®	Intel Atom®
Processor frequency	1.8 GHz	1.8 GHz
Number of processors installed	1	1
Memoryidentical
Internal memory	1 GB	1 GB
Flash memory	512 MB	512 MB
Networkidentical
Wi-Fi	No	No
DHCP client	Yes	Yes
DHCP server	Yes	Yes
iSCSI support	Yes	Yes
Cabling technology	10/100/1000BASE-T(X)	10/100/1000BASE-T(X)
Maximum data transfer rate	1000 Mbit/s	1000 Mbit/s
Ports & interfacesidentical
Ethernet LAN (RJ-45) ports	2	2
USB 2.0 ports quantity	5	5
eSATA	Yes	Yes
Designidentical
Chassis type	Tower	Tower
Number of fans	1 fan(s)	1 fan(s)
LED indicators	eSATA, LAN, Status, USB	eSATA, LAN, Status, USB
Performanceidentical
Buzzer	Yes	Yes
Number of users	2048 user(s)	2048 user(s)
Noise level	37.4 dB	37.4 dB
Management protocols	SNMP	SNMP
Web-based management	Yes	Yes
On/off switch	Yes	Yes
Reset button	Yes	Yes
Security algorithms	HTTPS, SSH, SSL/TLS	HTTPS, SSH, SSL/TLS
Poweridentical
Power consumption (typical)	23 W	23 W
Power consumption (sleep)	16 W	16 W
Output power	84 W	84 W
Weight & dimensionsidentical
Weight	1.74 kg	1.74 kg
Operational conditionsidentical
Operating temperature (T-T)	0 - 40 °C	0 - 40 °C
Relative humidity	0 - 85%	0 - 85%
Other featuresidentical
Compatible operating systems	Windows 2000, XP, Vista (32/ 64 bit), Windows 7 (32/ 64 bit), Server 2003/ 2008 Mac OS X Linux, Unix	Windows 2000, XP, Vista (32/ 64 bit), Windows 7 (32/ 64 bit), Server 2003/ 2008 Mac OS X Linux, Unix
Dimensions (WxDxH)	102 x 216 x 150 mm	102 x 216 x 150 mm
Fan	70 mm	70 mm
Networking features	Gigabit Ethernet	Gigabit Ethernet
Power requirements	100 - 240 V, 50/60 Hz	100 - 240 V, 50/60 Hz

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.