[[unRAID 6.10.0-rc1] - emhttpd: read SMART events keep spinning up array disks]

Check my previous comment, after hours upon hours of troubleshooting I found out the culprit is my hypervisor (ESXI). Hopefully this helps some of you.

[[unRAID 6.10.0-rc1] - emhttpd: read SMART events keep spinning up array disks]

On 2/11/2022 at 3:25 PM, sww said:

Sharing my experience as a user that was also facing this SMART read issue but found a solution, for what it's worth;

 

The culprit was my "system" share was set to Cache-Prefer but my docker.img file was still sitting on my array, meaning any reads/writes were causing a spin up. I guess Unraid then took the opportunity to read SMART data as the drive was active which is why I saw it in the logs.

 

Note, I do have mover scheduled but evidently it couldn't move the docker.img file because Docker was always enabled and the file in-use. I assume a file that is in-use is prevented from moving, I don't know that for sure. After disabling docker, running mover, seeing the 40GB move from my array to my cache drive, and re-enabling docker, the spin-ups and SMART reads have gone away.

 

Also, the heavy hard drive activity I experienced when enabling or disabling docker no longer occurs, presumably because it's no longer hitting the docker.img file on my array. If anyone else sees that symptom, perhaps my solution with work for you.

This was the solution for me! Thanks.

 

Edit.. I was too soon with my answer. This wasn't it. For me the problem seems to be solved after accessing the disk in Unraid and clicking through the tabs:

It seems that after doing this, the drives don't start up anymore. If this is really the solution, then this is definitely a bug in Unraid and should be patched.

 

It is now 17:00 and the disk hasn't spun up yet, so this seems to be it...?

 

I also tried the following to solve it, but to no avail:

• move docker .img to SSD
• clean up shares
• play around with Tunable (poll_attributes) values
• remove Unassigned Devices plugin (and reinstall after concluding it didn't have any effect)
• sign out of unraid server plugin
• remove NERD Pack plugin
• install scrutiny docker app
• stop docker entirely
• stop part of some docker apps (i.e. Plex)
• stopping all cron jobs
• disabling SMB on the shares that use the drives that are constantly spinning up

 

Hope this helps some of you. Again: if this really is the case, then please devs, fix it!

 

Edit 20-aug, the saga continues.... 

 

Look like I finally find the culprit. My Unraid is running as a VM in ESXI. ESXI uses smart daemon every 30 minutes. 

 

After disabling the smart daemon using command:

/etc/init.d/smartd stop

the polling stopped! Problem solved!