SD compatibility list

The cards listed in green work in any file system. The cards listed in yellow work only in one file system (this still means they can be used). The cards listed in red do not work at all.

Note: always measure read speed with this command:

• in left slot: dd if=/dev/mmcblk0 of=/dev/null bs=4MiB count=100
• in right slot: dd if=/dev/mmcblk1 of=/dev/null bs=4MiB count=100

If you can afford destroying all your data, you can test write speed. But be careful, you will need to create a new partition table, afterwards! You can use Gparted to make new partition table.

• in left slot: # dd if=/dev/zero of=/dev/mmcblk0 bs=4MiB count=100
• in right slot: # dd if=/dev/zero of=/dev/mmcblk1 bs=4MiB count=100

SDHC card brand	Card size	Card class	Full name	URL	fat32 is working?	ext2/3/4 are working?	read speed MB/sec	write speed MB/sec	actual capacity (1K-blocks)	Notes
Kingston	1GB	unknown	Kingston 1GB (blue)	[1] (looks very similar to that one, except that I have 1GB)	yes	yes	12.5	?	?	ok
Kingston	16GB	4	Kingston 16 GB Class 4 SDHC	[2]	no	no	15	?	15663104	Bad controller chip, fails in the same manner as the 32GB card.
Kingston	32GB	4	Kingston 32 GB Class 4 SDHC	[3]	no	no	16	?	31539200	Defective flash controller randomly loses writes regardless of filesystem. When attempting to write, blocks sometimes get erased but not written.
Kingston	32GB	10	class 10, kingston 32GB (red)	[4] like this, but 32GB: [5]	yes	no	15.2	?	?	doesn't have badblocks, seems that "Flash Translation Layer" is not suitable for ext filesystems
Patriot	32GB	10	Patriot LX 32GB SDHC Class 10 (PSF32GSDHC10)	[6] [7]	yes	no	18.1	12.6	?	Formatting EXT2 and then running fsck right after finds errors.
Pretec	4GB	10	Class 10, Pretec 4GB, 233x (white/green)	[8]	yes	yes I had very few fsck problems, and after several tries running fsck, they eventually got corrected.	14.0	?	?	It looks very similar to that broken 32GB pretec. Except that this one almost works good.
Pretec	32GB	10	class 10, Pretec 32GB 233x (white/green)	[9]	yes	no	14.1	12.4	?	doesn't have badblocks, seems that "Flash Translation Layer" is not suitable for ext filesystems
SanDisk	32GB	4	SanDisk Ultra 32 GB Class 4 SDHC	[10]	yes	yes	16.4	7.1	?	OK.
Sandisk	64GB	4	Sandisk 64GB SDXC Class 4	[11]	yes	yes	16.1	4.5	62367744	Works fine
Transcend	32GB	10	Transcend 32GB SDHC Class 10	[12]	?	no	?	?	?	Has serious issues
Transcend	64GB	10	Transcend SDXC Card 64GB ULTIMATE CLASS 10 (PN:TS64GSDXC10)	[13]	yes (needs more testing)	no	16.1	16.1	?	After some time the system gives read/write errors. Works fine on a pc with linux with ext2/ext3.
Zap	32GB	4	Zap Glider 32GB Class 4	[14]	?	yes	16.6	4.6	?	Works fine