On 9/12/2011 5:24 AM, IVP wrote: >>> This is seen as 7 fast sector writes followed by 3 slow onesup on th >> It is related to the SDcard internal buffer. > Hi Nicola. That doesn't explain to me the consistent 7 fast 3 slow > pattern. I would have expected something more regular, perhaps > not a '10' grouping. If it was 1-1, 7-1 or 15-1 maybe, more 'hex' > > Joe I'm not at all up on this, but it might be base 2 if, for instance,=20 there are 8 buffers and filling the 8th (high water mark) causes slow,=20 and reducing to 4 hits a low water mark, enabling fast. Just a BWAG. =20 Plus or minus some magnitude of fencepost error. Joe W --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .