https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Tue, 23 Jun 2026 09:06:16 +0000 Thu, 10 Jan 2019 03:47:54 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=10649 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=10649&PID=59795&title=random-bits-flipping-on-asrock-j3710itx#59795 Author: diwo7G
Subject: 10649
Posted: 10 Jan 2019 at 3:47am

I use a ASRock J3710-ITX mainboard for a small Linux home server / NAS. A few weeks ago I suddenly noticed that the data disk's btrfs file system was broken. Since I suspected it might be a hardware issue, I did several tests:

- main memory check with memtest86 - no errors found
- disk check (SMART long test, badblocks non-destructive read/write test) - no errors found
- a few hours of stress testing with mprime - no errors found

Because the hardware seemed to be OK, I completely reinstalled the system and tried to restore my backups (about 400 GB on a USB drive).
After copying the data, I noticed that some of the restored files' MD5 hashes did not match the hashes on my backup drive. So during the copying process a few files were damaged. I had a detailed look at those files and noticed that in each of those files just a single bit flipped.

I repeated this test multiple times and always a few files were damaged after copying (but not the same files).

What I've already tried:

- Copying data form USB drive to the server's internal disk (both with rsync and cp) - some files damaged
- Copying data from the server's internal disk to the same disk - some files damaged
- Copying data from USB drive to hard disk on a completely different computer - no errors (so the USB drive can't be the cause)
- Removing the server's hard drive, connecting it to a different computer and copying the data there - no error (so it's not the hard drive either)

My hardware configuration:

- ASRock J3710-ITX
- 1 x Kingston KVR16LS11/8 8GB
- picoPSU-150-XT
- 2 x 2000GB WD Red

Do you have any suggestions what I could do to solve that issue?

Thanks!]]> Thu, 10 Jan 2019 03:47:54 +0000 https://forum.asrock.com/forum_posts.asp?TID=10649&PID=59795&title=random-bits-flipping-on-asrock-j3710itx#59795