Hi,
I met a question about USB3.0 speed test on Tda2x demo board. My test environment as follows,
1. SDK version: PROCESSOR_SDK_VISION_03_01_00_00
2. removable solid state hard disk (Kingston SA400S37/240GBKCN)
3. Reference doc:<<TDA2xx and TDA2ex Performance .pdf>>
Chapter 8.2.1, descript as follows,
Commands used for the transactions are:
• IN: dd if=/dev/sda of=/dev/null bs=1M count=100 iflag=direct
• OUT: dd if=/dev/zero of=/dev/sda bs=1M count=100 oflag=direct
I run dd command as above on my Tda2x demo board, but it reminder me:
root@dra7xx-evm:~# dd if=/dev/zero of=/dev/sda bs=1M count=100 oflag=direct
BusyBox v1.24.1 (2019-05-14 01:27:56 IST) multi-call binary.
BusyBox v1.24.1 (2019-05-14 01:27:56 IST) multi-call binary.
Usage: dd [if=FILE] [of=FILE] [ibs=N] [obs=N] [bs=N] [count=N] [skip=N]
[seek=N] [conv=notrunc|noerror|sync|fsync]
root@dra7xx-evm:~#
[seek=N] [conv=notrunc|noerror|sync|fsync]
root@dra7xx-evm:~#
Why this result is not in accordance with doc description?
If I change dd command as follows, it run susscessfully,
dd if=/dev/zero of=/dev/sda bs=1M count=100 conv=fsync
its' running result is:
root@dra7xx-evm:~# dd if=/dev/zero of=/dev/sda bs=1M count=100 conv=fsync
100+0 records in
100+0 records out
root@dra7xx-evm:~#
100+0 records in
100+0 records out
root@dra7xx-evm:~#
why there is no running time and running speed in result?
