iStorage QS2 250GB SATA vs iStorage QS2 500GB SATA

Comparison of QS2 250GB SATA, QS2 500GB SATA

16 specifications	A iStorage QS2 250GB SATAView product	B iStorage QS2 500GB SATAView product
Hard drive2 differ
HDD capacityDiffers	250 GB	500 GB
HDD speed	7200 RPM	7200 RPM
Type	HDD	HDD
Storage drive buffer sizeDiffers	8 MB	16 MB
Operational conditionsidentical
Operating shock	200 G	200 G
Weight & dimensionsidentical
Weight	907 g	907 g
Packaging dataidentical
Bundled software	NTI Backup NOW! 4 OEM (Windows)	NTI Backup NOW! 4 OEM (Windows)
Other featuresidentical
Access time	8.5 ms	8.5 ms
Data transfer rate	3 Gbit/s	3 Gbit/s
Interface type	USB 2.0 & eSATA	USB 2.0 & eSATA
Internal	No	No
Mac compatibility	Yes	Yes
Mean time between failures (MTBF)	750000 h	750000 h
Supported data transfer rates	USB: 480mbps; eSATA: 3gbps	USB: 480mbps; eSATA: 3gbps
Compatible operating systems	- Windows 98 - Windows 98SE - Windows ME - Windows 2000 - Windows XP - Windows Vista - Mac OS X	- Windows 98 - Windows 98SE - Windows ME - Windows 2000 - Windows XP - Windows Vista - Mac OS X
Dimensions (WxDxH)	196 x 114 x 35 mm	196 x 114 x 35 mm

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.