Ez-Bus-Mini Being Tested As An External Hard Disk
- 1. It Also Works Without A Power Cable
- 2. Apricorn's Ez-Bus-Mini In Detail
- 3. EZ Gig II: Data Backup Tool
- 4. Cryptainer LE: On-the-fly Encryption For Sensitive Data
- 5. Second Copy 2000: Automatically Create Exact Data Copies
- 6. Test System And Conditions
- 7. Ez-Bus-Mini Being Tested As An External Hard Disk
- 8. Practical Test: Backup And Recovery Of The Boot Partition
- 9. Conclusion: Great Success
7. Ez-Bus-Mini Being Tested As An External Hard Disk
First, we want to take a look at the performance of the Ez-Bus-Mini being used as an external hard disk on the USB 2.0 interface of the notebook. For comparison purposes, we added a 2.5" Travelstar 40GNX, Model IC25N020 ATCS05-0 2.5" hard disk. At 5400 rpm, it not only rotates faster, but is also has a considerably larger cache with eight megaBytes.
The theoretical bandwidth of the USB interface is 480 Mbps, which is just short of 60 MB/s. In practice, however, transfer rates of only up to a maximum of 32 MB/s are achieved, even with external desktop hard disks with USB 2.0 interfaces.
The two following illustrations show the transfer rates established by Winbench 99 Ver2.0.
Data transfer chart of the 1.8" Ez-Bus-Mini...
...and the 2.5" Travelstar 40GNX
As you can see, the transfer rates of both disks are similar. For Apricorn's Ez-Mini-USB, the transfer rate lies somewhat above 20 MB/s and drops to approximately 12 MB/s towards the middle of the disk. The faster rotating 2.5" disk from Hitachi reached rates between 26 MB/s and 14 MB/s on the USB 2.0 interface. The mean access times were 21.2 ms and 17.5 ms respectively. In both cases, the CPU load was just under 15 percent.
Apricorn's Ez-Mini-USB doesn't have to shy away at all from comparisons to larger and nominally faster hard disks.
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SecondCopy is a nice tool, and easy to use. I recently switched to a different tool you may want to look at, FileSync, from Tresante Software (http://www.tresante.com). Very easy to use, I may keep this instead of SecondCopy.
Thanks for your information. I lost all my data due to sudden power cut in my house. I didn't have data back up then. As I am not a very computer literate I was utterly confused and didn't know how to recover my data. Then my friend advised me to visit http://www.supportonclick.com. As I followed his advise the staffs over recovered my lost data almost within a minute. Since then I have shifted all the responsibilities of data backup to them and they are performing their duty quite successfully. I don't think I will be able to follow this method but definitely refer it to my friends and let you know their feed back. Thanks again.