[Flashbench] Patriot Rage XT 16 GB (inconclusive)

[Arnd Bergmann]

$ lsusb
Bus 001 Device 024: ID 13fe:3800 Kingston Technology Company Inc. 

# The device can access 12 12 MB erase blocks:

arnd at klappe2:~/git/flashbench$ sudo ./flashbench  /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=20
12MiB   12.9M/s 
6MiB    10.8M/s 
3MiB    7.49M/s 
1.5MiB  4.66M/s 
^C
arnd at klappe2:~/git/flashbench$ sudo ./flashbench  /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=12
12MiB   10.2M/s 
6MiB    13.8M/s 
3MiB    13.5M/s 
1.5MiB  13.2M/s 
768KiB  13.1M/s 
384KiB  12.8M/s 
192KiB  12.7M/s 
96KiB   15.3M/s 
^C
arnd at klappe2:~/git/flashbench$ sudo ./flashbench  /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=16
12MiB   14.2M/s 
6MiB    11M/s   
3MiB    7.64M/s 
1.5MiB  4.78M/s 
768KiB  2.69M/s 
384KiB  1.45M/s 
192KiB  767K/s  
^C
arnd at klappe2:~/git/flashbench$ sudo ./flashbench  /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=13
12MiB   12.9M/s 
6MiB    11.5M/s 
3MiB    8.35M/s 
1.5MiB  5.13M/s 
768KiB  2.89M/s 
384KiB  1.54M/s 
192KiB  758K/s  
96KiB   732K/s  
^C
arnd at klappe2:~/git/flashbench$ sudo ./flashbench  /dev/sdc --open-au --blocksize=$[3 * 8192] --erasesize=$[3 * 4096 * 1024] --open-au-nr=12
[sudo] password for arnd: 
12MiB   16.2M/s 
6MiB    13.2M/s 
3MiB    13M/s   
1.5MiB  13M/s   
768KiB  13.1M/s 
384KiB  12.5M/s 
192KiB  12.5M/s 
96KiB   14.9M/s 
48KiB   9.55M/s 

# This also works with 8 MB units (properly aligned to 24 MB by modifying flashbench):
$ sudo ./flashbench  /dev/sdc --open-au --blocksize=$[2 * 8192] --erasesize=$[ 2 * 4096 * 1024] --open-au-nr=12
8MiB    12.8M/s 
4MiB    11.8M/s 
2MiB    10.3M/s 
1MiB    16.6M/s 
512KiB  17M/s   
256KiB  15.6M/s 
128KiB  13.6M/s 
64KiB   18.4M/s 
32KiB   11.9M/s 
16KiB   3.41M/s 

arnd at klappe2:~/git/flashbench$ sudo ./flashbench  /dev/sdc --open-au --blocksize=$[2 * 8192] --erasesize=$[ 2 * 4096 * 1024] --open-au-nr=13
8MiB    16.4M/s 
4MiB    16.6M/s 
2MiB    14.4M/s 
1MiB    13.1M/s 
512KiB  10.4M/s 
256KiB  6.55M/s 
128KiB  3.87M/s 
^C

$ sudo ./flashbench  /dev/sdc --open-au --blocksize=$[2 * 8192] --erasesize=$[4 * 4096 * 1024] --open-au-nr=12
16MiB   13.4M/s 
8MiB    13.4M/s 
4MiB    11.6M/s 
2MiB    14.4M/s 
1MiB    16.4M/s 
512KiB  16.8M/s 
256KiB  15M/s   


The results are still not conlusive, especially after doing more tests
with --random. Will have to revisit.