Ahoj, Dňa Wed, 22 Jan 2014 10:57:27 -0700 Bob Proulx <bob@proulx.com> napísal: > I wouldn't say the slower device is of lower quality. By quality I > was referring to the internal spares and firmware for managing them > for wear leveling. A good quality card should last through a lot of > write cycles. A poor quality card might die due to being worn out > very quickly due to not having good wear leveling. You are right. No discussion :-) I want to point, that there are differences between cards marked with the same class. > The class 4 device is slower. The class 10 device is faster. And > whether they have good quality firmware and internal spares with good > wear leveling is completely unknown from the outside. Sure, speed has nothing with quality - it is only one from many parameters taking into play. But for my purposes (electronic playing) the speed is more important than long life. ;-) But... I have no plenty different SD cards to take own measurement and make own comparison. But if you take look into http://elinux.org/RPi_SD_cards (SD card performance section) and sort table by speed, you can see, that there are some Class 4 cards in order between Class 10 cards. Then you are right, but there are exceptions. But the SD card R/W speed can be affected the reading device too. regards -- Slavko http://slavino.sk
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