Hi There!

 

I'm new to unRaid and just finished building my first system.

I just discovered that on every system powerdown cycle the HDDs (in my case WD Red's) aren't spinning down properly.

To verify that behavior i checked the SMART value "power-off retract count" and it clearly shows me that the disks don't spin down until the powersupply cuts power.

 

Is there a way to configure a safe spindown at system shutdown? I'm a little worried about my drives.

 

System:

-unRaid 6.8

-ASUS P8H77-I with i5-3470

-LSI HBA 9300-8i with up to date FW/BIOS

-WD Red 4TB (WD40EFRX-68N32N0) & WD Red 3TB (WD30EFRX-68EUZN0)

 

Does anyone know a solution/workaround to fix this?

 

Regards,

 

Raivoo

AFAIK, no OS spins down the drives prior to shutdown (at least my Windows box doesn't)

Unraid needs to stop the array, which requires all disks to spun up before shutting down the system.

And this is safe  

Edited December 27, 20196 yr by bonienl

thank you for the fast answers.

 

Of couse the drives have to spin up to stop the array, no problem with that, but after the OS finished all the operations to the disks the disks should park their read/write heads and shutdown properly.

If they would do that the SMART value "power-off retract count" wouldn't increase.

If i manually spin up and spin down the disks in the unRAID-OS the drives are shutting down properly and the SMART value doesn't increase.

 

I don't plan to shutdown the whole system very often but all my other systems (Windows 10/7, Linux Mint, macOS) aren't causing an increasment of the particular SMART value mentioned above.

 

Could one of you maybe check the value on one of your disks? That would be very nice

I believe this happens when the disks are on an LSI, possibly other controllers, they power down correctly if for example on the Intel onboard SATA ports, not sure if anything can be done to fix it by LT, also don't know if it's a real problem, it shouldn't cause any harm to the disks.