SD/MMC cards, a year later

[John Watlington]

On Aug 19, 2010, at 12:03 AM, Benjamin M. Schwartz wrote:

> On 08/18/2010 11:24 PM, John Watlington wrote:
>> Nonetheless, we are going to try testing it with UbiFS and
>> considering whether any durability improvement justify the
>> increased price (now up to 2x) and built-in obsolescence of
>> using raw NAND chips.
> 
> If it hits 2x in price, I guess you might be able to start benchmarking
> against RAID-1 of two MicroSD cards.  RAID-1 gets you reliability,
> repairability, and a 2x boost in read bandwidth.

Interesting point !  There is a power hit (each card can take up to 0.3W
peak).

> I suppose that's only a
> consideration if the Armada can support 2 (or 3!) SD controllers.

One for internal microSD
One for external SD
One for WLAN
There is another, but we are having trouble getting it muxed onto
the right pins.

Cheers,
wad