Hello, My Dell latitude has an integrated O2 Micro SDHC card reader, listed by lspci as: 0a:00.0 SD Host controller: O2 Micro, Inc. OZ600FJ0/OZ900FJ0/OZ600FJS SD/MMC Card Reader Controller (rev 05) So far I was happily using it with cheap/slow SDHC cards. However recently I bought a "Samsung SDHC Pro" card which manages to aequentially write about 45mb/s when I dual-boot Windows7. The same card caps out on Linux at about ~4-5mb/s: > dd if=/dev/sda of=/dev/mmcblk0 conv=fsync bs=4M count=256 > 1073741824 bytes (1.1 GB) copied, 258.515 s, 4.2 MB/s My raspberry pi is able to write to the card at about ~8mb/s. Any ideas how to debug this issue would be highly appreciated. Thank you in advance, Clemens -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
