HDD I/O at 100%

Alexandru_Radu_Marin · May 18, 2025, 10:21am

Hi,

since today morning after reboot, i see the I/O is at 100%

I’ve rebooted and the first couple of minutes is fine but afterwards is going again to 100%.I’ve stopped the SMB share, no change. I’ve closed all the apps, no change.
What is interesting is that no email notification is received anymore after the reboot that I usually receive.
Not sure where to go from here.
I’m on the latest version 25.04.

Alexandru_Radu_Marin · May 18, 2025, 10:28am

Interesting, after i’ve started the apps again, the I/O went down for a bit and then went up again

Alexandru_Radu_Marin · May 18, 2025, 10:30am

yeah so i stopped a random app such as home-app and shortly the I/O went down again

neofusion · May 18, 2025, 10:59am

Have you installed any custom app?
What app is “home-app”?

Alexandru_Radu_Marin · May 18, 2025, 12:23pm

These are the only apps running

But I don’t feel this is an app problem because even with the app service completely shut down it doesn’t make a difference

Stux · May 18, 2025, 1:11pm

Do you have a scrub running?

Alexandru_Radu_Marin · May 19, 2025, 8:53am

Ok so I checked, the scrub was scheduled for next Sunday, I am doing them on a Monthly basis so no, there was no scrubbing job or any job that might have cause the excessive read rates.

Now, what I did to fix the issue:

Powered down the nas
removed the affected HDD
Powered on the NAS. Of course, warnings that the HDD is not there bla bla.
Added the HDD again
Powered on the NAS, it did some checks on the HDD etc.

Afterwards the excessive read rates did not happen anymore: