On Aug 20, 2010, at 2:55 PM, Hal Murray wrote: > >> One frustration has been the rate of change in the SD industry. The dominant >> model from a vendor in a particular size and speed may only be in production >> for three or four months before being superseded. Vendors are reluctant to >> properly inform Quanta of changes which might require retesting. The >> result is that SD card certification is an ongoing process. > > How many do I have to buy before a distributor or manufacturer will > cooperate? Or how much extra does it cost to get them to cooperate?
It appears to be a matter of cost more than volume, although it can be difficult to differentiate the two. > Is that whole industry segment so focused on low-cost that nobody knows how > to keep track of what they manufacturer/deliver? Some manufacturers track this relatively well (although it can be hard to get them to communicate this information). Others (whom we don't deal with at all) seem to have little to no control. > What do cell phone manufacturers do? A number of them are paying a premium for eMMC chip from a single manufacturer to get around this. Others just accept that failures are going to happen. Note that almost all the SD cards I've tested would work fine for average use. In my testing, I'm expecting cards to survive a usage that is equivalent to filling half the card with new data (2 GB) every day for five years. Both Apple and Microsoft are using raw NAND flash chips in their products as a way of maintaining more control. _______________________________________________ Devel mailing list [email protected] http://lists.laptop.org/listinfo/devel
