SD vs. SDHC?

[bobnielsen]

I see that the larger capacity SD cards are labeled "SDHC".  Is the reader in the plug compatible with these or only the smaller "SD" cards?

[Reedy]

Plenty of reports of SDHC cards working fine.. Some manufacturers are fine, some aren't for other people.. Seems a case of YMMV

[karurosu]

Almost every card works (SD or SDHC) the problem is a buggy high speed driver, simply disabling the high speed mode makes most cards work.

[bogolisk]

Almost every card works (SD or SDHC) the problem is a buggy high speed driver, simply disabling the high speed mode makes most cards work.

Or maybe the buggy high-speed cards? I've never written a SD driver but I did write a MMC-Plus (up to 52MHz) proprietary host driver for embedded linux and enabling high-speed was dead simple, it'd be very hard to make buggy highspeed mode. IMO, it'd really be (cheapo) cards that reported as supporting highspeed but cannot do it. I never encounter such cards because we use industrial eMMC parts so they have better Q/A than the ones you can off-the-shelves.

[karurosu]

Well, it has to be a buggy driver, since the cards I've tried work perfectly with high speed readers.