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Great performance just one problem... Jun 22, 2010
Exelent performance, single 20GB files go for stable 60MB/s on eSATA interface, the only problem I have is that copying back that 20GB file back to my disk can't be done on the eSATA interface, because it freezes when on like 20% progress. So right now I do can use eSATA to copy to the memory at super fast speed, but I can't use the same eSATA interface to copy anything back, unless is an archive with less than 4GB, those can be copy from the memory on the eSATA without any problem.
3 of 3 found the following review helpful:
 About 2x Faster than USB2 Mar 11, 2010
In contrast to J. Lucius' review I found the eSATA setup to be around twice as fast in transferring data than the USB port, depending on the computer's capability.
My testing was even simpler than Mr. Lucius, however. I tested my 64GB e-Flash drive on two computers, the first was a new Zotac MAG unit, with a Dual Core Atom, and where I had increased the memory to 4GB, replaced the HD with an 80GB Intel SSD, and was running Win7. Here are the results:
Connected via eSATA and powered from a USB port, a 3.9 GB file was copied from the e-Flash to my desktop in a little over 45 seconds, or about 86MB/sec.
Connected only to the USB port for data and power, the same file was copied in about a minute and 55 seconds, or nearly 34MB/sec.
So the eSATA connection was 86/34 = 2.5 times as fast as the USB.
The 2nd computer was an HP model DC7900 Small Form Factor PC with the Core2 vPro setup, 2GB of RAM, 160GB, 7200 RPM HD, and WinXP Pro
Connected via eSATA and powered from the USB, the same 3.9 GB file was copied from the e-Flash to the desktop in 1 minute, 41 seconds, or 37MB/sec.
Connected only via USB, the same file was copied in 2 minutes, 56 seconds, or 22MB/sec.
So the eSATA connection was 37/22 = 1.7 times as fast as USB.
Note in all cases, the e-Flash was being read from, not written to. I have not tested its write speed.
I'm very pleased with the eFlash and would give it a strong recommendation. Besides its high speed, I like its aluminum case which gives it solid, quality feel. My only negative thoughts are about the end caps, which once removed, are loose and could be lost.
2 of 2 found the following review helpful:
 Little difference between eSATA and USB2 speeds Mar 01, 2010
I bought the Kanguru 64GB eFlash for use with a Dell M6400 Mobile Workstation (a heavy, but powerful, laptop). Here are the approximate transfer times and speeds for a 55 MB file (windows .cab), a 157 MB file (backup of Windows registry) and a 10.7 GB folder (6,923 files in 811 folders). I used the second hand on my watch so times are not super accurate.
M6400 write to eFlash using eSATA (powered through USB port)
55 MB file: ~2s; ~28 MB/s
157 MB file; ~7s; ~22.5 MB/s
10.7 GB folder: ~16 min; ~11.5 MB/s
M6400 write to eFlash using USB
55 MB file: ~2s; ~28 MB/s
157 MB file; ~6s; ~26 MB/s
10.7 GB folder: ~17 min; ~10.5 MB/s
M6400 read from to eFlash using eSATA (powered through USB port)
55 MB file: ~<1s; ~55 MB/s
157 MB file; ~3s; ~52 MB/s
10.7 GB folder: ~10 min; ~17 MB/s
M6400 read from to eFlash using USB
55 MB file: ~2s; ~28 MB/s
157 MB file; ~5.5s; ~28.5 MB/s
10.7 GB folder: ~9 min; ~20.3 MB/s
My simple transfer speed tests show that the eSATA interface essentially has no advantage over the USB except for read-from-eFlash operations for moderately sized single files, at least for my setup and types of files transferred. In addition, I had multiple incidences of the blue screen of death and automatic reboot on the M6400 when inserting or removing the eFlash using the eSATA interface.
The eFlash does show up as a hard drive, but is removed using the removable drive icon in the task bar. The Hotswap software included did not recognize the drive when using the eSATA interface; I didn't try with the USB interface.
I cannot recommend the Kanguru 64GB eFlash (eSATA/USB). With my setup, the eSATA interface is no faster than the USB. For the price, much larger (in capacity and physical size) external USB drives can be bought, some that easily fit in a shirt or pants pocket and are powered through the USB.
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