I was looking for an external USB hard drive without a separate power supply for recording and Timeshift on my Samsung UE32D5700 (Recording / Timeshift function subsequently released). The choice fell on the Western Digital WD Elements 500GB 10A8. Unfortunately it was not the performance test of the TV! After I had corrected as the Internet described one byte in a hidden file generated by the TV (.PVRPfmChkLog), the TV accepted the hard drive though and shooting function, however Timeshift lurched heavily in HD channels. The second choice was the Western Digital WD 1TB MyPassport Ultra. The same procedure as the first choice with the same result! Although the bucking was not quite si arg with Timeshift. In between, I tried a 32GB USB Stick (Jetflash Transcend 32GB). But even with this stick I received the error message "The device has not passed the performance test". After manipulating the hidden file recording and Timeshift functioned well in HD, but crashed after about 30 minutes time shift regularly from! Finally, then the Samsung M3 Portable 1TB and behold performance test passed, recording and Timeshift function in HD - perfectly. A significant difference of the plates trying out was the minimum transfer rate (measured with HDTune port to a USB 2.0, in brackets AccessTiime):
WD Elements 500GB 10A8: 18.1 MB / s (16,1ms) WD 1TB MyPassport Ultra: 29.3 MB / s (17,1ms) Samsung M3 Portable 1TB: 32.1 MB / s (17,9ms) Transcend 32GB JetFlash: 28.0 MB / s (0,9ms!)
In CrystalDiskMark is the Samsung board the sequential read / write the fastest, even if only by a few percent.
That these small performance differences finally decide whether the Samsung performance test is passed or not, but it is amazing. Perhaps the Samsung TV like but simply prefer HDDs from the house ?!
