Hi!
El 28/03/12 15:25, Arnd Bergmann escribió:
If you're still motivated to do additional tests, can you retry the above tests with erasesize of 1MB and 4MB? Don't worry about it if you've already started using the card for real stuff again.
We're lucky. The card is not in the camcorder, so let's test.
4Mb Erase block
./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 *1024] /dev/sdc --open-au-nr=2 4MiB 7.81M/s 2MiB 10.9M/s 1MiB 10.5M/s 512KiB 11M/s 256KiB 11M/s 128KiB 10.3M/s 64KiB 9.73M/s 32KiB 8.09M/s 16KiB 5.2M/s 8KiB 3.08M/s
./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 *1024] /dev/sdc --open-au-nr=30 4MiB 11M/s 2MiB 11.2M/s 1MiB 11.2M/s 512KiB 10.7M/s 256KiB 9.97M/s 128KiB 9.12M/s 64KiB 8.5M/s 32KiB 7.28M/s 16KiB 4.92M/s 8KiB 2.92M/s
./flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[8 *1024] /dev/sdc --open-au-nr=31 4MiB 11.5M/s 2MiB 11.4M/s 1MiB 11.1M/s 512KiB 10.5M/s 256KiB 9.64M/s 128KiB 8.18M/s 64KiB 6.41M/s 32KiB 4.48M/s 16KiB 2.72M/s 8KiB 1.16M/s
1MB Erase block (launched with "time" to show that using --open-au-nr=30 and --open-au-nr=31 takes much longer than --open-au-nr=2
time ./flashbench -O --erasesize=$[1*1024*1024] --blocksize=$[1*1024] /dev/sdc --open-au-nr=2 1MiB 11.9M/s 512KiB 11.1M/s 256KiB 10.7M/s 128KiB 9.93M/s 64KiB 8.72M/s 32KiB 6.66M/s 16KiB 5.3M/s 8KiB 3.15M/s 4KiB 1.46M/s 2KiB 702K/s 1KiB 343K/s
real 0m13.300s user 0m0.204s sys 0m0.524s
time ./flashbench -O --erasesize=$[1*1024*1024] --blocksize=$[1*1024] /dev/sdc --open-au-nr=30 1MiB 11.4M/s 512KiB 11.4M/s 256KiB 10.9M/s 128KiB 10.1M/s 64KiB 9.06M/s 32KiB 7.29M/s 16KiB 5.28M/s 8KiB 2.71M/s 4KiB 1.35M/s 2KiB 683K/s 1KiB 338K/s
real 3m20.017s user 0m0.764s sys 0m5.244s
time ./flashbench -O --erasesize=$[1*1024*1024] --blocksize=$[1*1024] /dev/sdc --open-au-nr=31 1MiB 11.4M/s 512KiB 11.4M/s 256KiB 10.9M/s 128KiB 9.98M/s 64KiB 8.61M/s 32KiB 6.78M/s 16KiB 5.35M/s 8KiB 2.74M/s 4KiB 1.36M/s 2KiB 692K/s 1KiB 340K/s
real 3m25.511s user 0m0.332s sys 0m5.728s
With this results i'm not sure about the 30 erase blocks.
what do you think?
Regards