I have a Sandisk class 10 SDHC card U1 Extreme 45MB / s 32GB to use for recording HD video, and lately I am having problems artifacts in the video image.
I suspect it may be a problem of the sd card.
I’ve tested with h2testw and this is the result that has given me:
The media is likely to be defective.
29.7 GByte OK (62304830 sectors)
1.7 MByte DATA LOST (3522 sectors)
Details:0 KByte overwritten (0 sectors)
1.7 MByte slightly changed (< 8 bit/sector, 3522 sectors)
0 KByte corrupted (0 sectors)
0 KByte aliased memory (0 sectors)
First error at offset: 0x00000000004cb2b0
H2testw version 1.3
Writing speed: 19.5 MByte/s
Reading speed: 25.4 MByte/s