Fri Dec 19, 2014 9:19 am
drgeoff wrote:B.Goode wrote:I think I am right in saying that SD only supports cards up to 2Gb, and that SDHC is needed for 4Gb up to some larger value.
Not 100% correct. Prior to SDHC there were a few manufacturers that produced 4Gbyte SD cards. I think they were an unofficial "extension" of the SD spec.
I know they exist because I have one which works fine in an old Dell X50v PDA (WM2003SE) and gives the full nominal 4 Gbyte. SDHC cards do not work in it.
I've never seen another one and I haven't seen them advertised since a long time ago.
Interesting ... confirms my suspicions

AIUI (from the suppliers I used at the time) SDHC card readers/writers were introduced into camera's first, with the intention of "rolling out" to computers in ~12 months or so later. Hence my two first 4Gb SDHC cards were supplied with USB-stick style card readers/writers (integral brand). Not so sure about the microSDHC (physical) format though. I think it's "predecessor" was "transflash" (which may have been equivalent to SD) but I don't recall seeing microSD cards only microSDHC (but, then again, I didn't have any need for such and thus wasn't really "loooking"

).
Trev.
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, 2xB2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, and a A+) but Buster on the P4B's. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm