On Thursday 31 March 2011, Yioryos Asprobounitis wrote: > I have a very good 2-year old 4GB class 6 Transcend > a poor 1-year old 4BG class 6 Kingsoton > and terrible 2-year old 8GB A-data > Rating is based on iozone data and "terrible" means that I get file corruption > quite often. Kingston is just slow. > None of them is formatted as suggested.
If you get file corruption, the card is at the end of its life, you should probably toss it out. I would be interested in seeing flashbench results for this card before you throw it away. I can tell you how to do it if you are interested. The Kingston card probably uses a toshiba controller (oemid 0x544d in /sys/block/mmcblk0/device/oemid), which is not suitable for ext3 at all. The reason for the slow speed is that you have a giant write amplification, which ages your card very quickly, and it will probably die next unless you use it in a digital camera with FAT32, where it can still enjoy a long and happy life as a fast card. The transcend cards I've seen typically use samsung controllers (oemid 0x534d), which are reasonable. If you want to make measurements comparing different file system settings, I think it only makes sense using this card. Arnd _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel