While testing the performance of the SD interface on the XO, an Eee PC, and a generic reader (see the results at http://ossguy.com/?p=27), I found that the XO was significantly slower than the other devices in almost all tests. In many cases, it was less than half as fast as the Eee PC, and in one case the write speed was 350 KiB/s, which is virtually unusable.
I am wondering if this is a known issue as I haven't seen any mention of it on the wiki or in Trac. Is the SD interfacing hardware actually supposed to run this slowly? Additionally, I encountered I/O errors similar to those in http://dev.laptop.org/ticket/6078 when using one of the cards. This card worked fine with the generic reader on another laptop. Any thoughts on why this might be happening? On a more physical note, the slot in the XO interferes with the lock slider on some SD cards. When a card is inserted, the side of the slot can catch on the lock slider of the card, moving it from the unlocked to the locked position during insertion. It is possible that the lock slider could be moved to an in-between position during insertion; I'm not sure if this would have an impact on the I/O errors. In any case, it would be a good idea to fix this in future hardware revisions. If you think some of these issues would be best logged to Trac, let me know and I'll do that. Denver _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel