Random bits flipping on ASRock J3710-ITX

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   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!

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diwo7G Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 Jan 2019 Status: Offline Points: 3	Post Options Post Reply Quote diwo7G Report Post Thanks(0) Quote Reply Topic: Random bits flipping on ASRock J3710-ITX 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!