SD compatibility list

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	32GB	10	class 10, kingston 32GB (red)	[1] like this, but 32GB: [2]	yes	no	15.2	?	?	doesn't have badblocks, seems that "Flash Translation Layer" is not suitable for ext filesystems
Pretec	32GB	10	class 10, Pretec 32GB 233x (white/green)	[3]	yes	no	14.1	12.4	?	doesn't have badblocks, seems that "Flash Translation Layer" is not suitable for ext filesystems
Kingston	1GB	unknown	Kingston 1GB (blue)	looks very similar to this one, except that I have 1GB: [4]	yes	yes	12.5	?	?	ok
Pretec	4GB	10	Class 10, Pretec 4GB, 233x (white/green)	[5]	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.
Transcend	64GB	10	Transcend SDXC Card 64GB ULTIMATE CLASS 10 (PN:TS64GSDXC10)	[6]	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	[7]	?	yes	16.6	4.6	?	Works fine
Sandisk	64GB	4	Sandisk 64GB SDXC Class 4	[8]	yes	yes	16.1	4.5	62367744	Works fine
Transcend	32GB	10	Transcend 32GB SDHC Class 10	[9]	?	no	?	?	?	Has serious issues
Patriot	32GB	10	Patriot LX 32GB SDHC Class 10 (PSF32GSDHC10)	[10] [11]	Yes	No	18.1	12.6	?	Formatting EXT2 and then running fsck right after finds errors.
Kingston	32GB	4	Kingston 32 GB Class 4 SDHC	[12]	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	16GB	4	Kingston 16 GB Class 4 SDHC	[13]	No	No	15	?	15663104	Bad controller chip, fails in the same manner as the 32GB card.
SanDisk	32GB	4	SanDisk Ultra 32 GB Class 4 SDHC	[14]	Yes	Yes	16.4	7.1	?	OK.