Messages in this thread | | | Date | Mon, 29 May 2006 16:00:26 +0200 | From | Pierre Ossman <> | Subject | 2GB MMC/SD cards |
| |
Hi Russell!
Not sure when you'll be back from your trip, but I'll leave this hanging in your inbox until then. :)
I've been getting several complaints about the issue with sector sizes and large MMC/SD cards. I seem to recall we discussed this earlier, but I cannot find those mail and I don't remember our conclusions.
I do, however, have the following in both the SD and MMC card specs I have (both sandisk though):
WRITE_BL_PARTIAL — defines whether partial block sizes can be used in block write commands.
Table 3-25 WRITE_BL_PARTIAL Definition 0 Only the WRITE_BL_LEN block size, and its partial derivatives in resolution of units of 512 blocks, can be used for block oriented data write. 1 Smaller blocks can be used as well. The minimum block size is one byte.
So perhaps we should remove all the funky logic that's in mmc_block.c right now and just always select a block size of 512 bytes? People have been reporting that their Palms, cameras and USB readers will not accept anything else.
Rgds Pierre - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |