On 08/22/2016 03:12 PM, subrat dash wrote:
Hello, Hope you are well..!! I have a question regarding the verify test that is done using FIO. I am trying to run the --rw=read test using FIO. However, I am getting an error #84. Please find attached the output file. *err=84 (file:io_u.c:1805, func=io_u_sync_complete, error=Invalid or incomplete multibyte or wide character)* If you see in the output file, I ran the test with and without the verify_pattern argument. The test PASSES when I don't use this option but FAILs when I do. Also, This happens only when the Sequential READ test is done. The test does not FAIL when I use any other option such as mix write and read or random read, etc etc.. Can you please tell me what exactly happens with this test? Does the command actually write the pattern to the drive first and then try to read it back or does it just try to read the pattern without writing anything? Does the test check for any ECC errors?
You really need to have a write phase first, not just a read phase. The basic file layout will just happen to work with some read verification, but don't rely on it. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
