Is there an SD Card diagnostic utility?

Are there any SD Card diagnostic utility programs out there for Ubuntu? I would like to run tests on my SD card to check capacity, write speed etc. I have one for windows but I am looking for a Linux flavor and hope to find some source code.

Look for Disk Utility on you dash (as an option press Alt+F2 and type palimpsest)

Click on the disk you want information from, to test it click on Benchmark

To start benchmark, select Read only or Read/Write benchmark

For Ubuntu 13.04 and later...

From the dash

From the command line

gnome-disks

Usage

Select the disk you wish to test. Find the menu in the top right and select Benchmark...

A window will appear. Click Start Benchmark... to see:

I left the defaults and clicked Start Benchmarking.... It will run for a while, building the chart over time. You can see that my new SD card's read rate is around 7 MB/s, while the write rate is only slightly over 2 MB/s.

The model shown here is a SanDisk Ultra SDXC with an advertised speed of up to 30 MB/s. As you can see, the transfer rate is not as advertised.

Reported Capacity

$ df -h /media/sdcard

Real capacity and write speed

$ dd if=/dev/zero of=/media/sdcard/testfile bs=10M
1xx+0 records in 1xx+0 records out 9xx bytes (9.4 GiB) copied, 34.xx seconds, 271 MB/s

dd will fill up all the space. Remove the testfile afterwards.

There is also f3 (Repository, doc), that specifically aims at detecting fraudulent cards.

It was suggested here first.