Toshiba SD-C008UHS1(6A
man:0x000002 oem:0x544d name:SE08G hwrev:0x2 fwrev:0x2

https://github.com/hglm/flash-bench

pi@raspberrypi ~/flash-bench $ sudo ./flash-bench
Creating test file flash-bench.tmp of size 512MB.
Benchmark: Sequential read  Limits: Total size: 512MB Duration: 60s
512.0MB processed in 32.41s (15.80MB/s), CPU: user 0.09%, sys 1.83%
Benchmark: Sequential write  Limits: Total size: 512MB Duration: 60s
512.0MB processed in 46.05s (11.12MB/s), CPU: user 0.04%, sys 2.07%
Benchmark: Random read  Limits: Total size: 512MB Duration: 60s
142.4MB processed in 60.07s (2.37MB/s), CPU: user 0.05%, sys 1.35%
Benchmark: Random write  Limits: Total size: 512MB Duration: 60s
216.7MB processed in 231.75s (0.94MB/s), CPU: user 0.01%, sys 0.26%
pi@raspberrypi ~/flash-bench $ sudo ./flash-bench
Using test file flash-bench.tmp (using all 512MB).
Benchmark: Sequential read  Limits: Total size: 512MB Duration: 60s
512.0MB processed in 32.48s (15.77MB/s), CPU: user 0.11%, sys 1.80%
Benchmark: Sequential write  Limits: Total size: 512MB Duration: 60s
512.0MB processed in 46.19s (11.08MB/s), CPU: user 0.07%, sys 2.51%
Benchmark: Random read  Limits: Total size: 512MB Duration: 60s
143.4MB processed in 60.03s (2.39MB/s), CPU: user 0.03%, sys 1.17%
Benchmark: Random write  Limits: Total size: 512MB Duration: 60s
217.0MB processed in 238.88s (0.91MB/s), CPU: user 0.00%, sys 0.26%
pi@raspberrypi ~/flash-bench $ sudo ./flash-bench
Using test file flash-bench.tmp (using all 512MB).
Benchmark: Sequential read  Limits: Total size: 512MB Duration: 60s
512.0MB processed in 32.44s (15.78MB/s), CPU: user 0.11%, sys 1.73%
Benchmark: Sequential write  Limits: Total size: 512MB Duration: 60s
512.0MB processed in 45.43s (11.27MB/s), CPU: user 0.08%, sys 2.01%
Benchmark: Random read  Limits: Total size: 512MB Duration: 60s
143.0MB processed in 60.08s (2.38MB/s), CPU: user 0.03%, sys 1.14%
Benchmark: Random write  Limits: Total size: 512MB Duration: 60s
218.0MB processed in 233.71s (0.93MB/s), CPU: user 0.01%, sys 0.18%