Has anyone found a solution to this problem?  I've changed the spin down time within the cache drive, and that didn't work.  I changed the setting in the PMS to only update manually.  That didn't work either.

 

I'm using latest UnRaid 5.0 with Plex v0.9.8.6.175-88ffbb2?

 

The first log shows the PMS stopped, and I am able to spin down the cache drive.  Then I re-start PMS, and manually spin down the drive, which shows all the drives spin down, but the cache drive never does.

syslog-2013-10-22.txt

Plex does access the disc on which it is installed from time to time, even when logging and updating is turned off. You will either have to complain in the plex forums and then wait until a new version fixes that in the future or remove plex from the cache.

 

I had the same problem. To keep plex, I bought a small SSD, installed it and now mount it in my go file on each boot. Plex is installed on that drive and may access it however it pleases. Its silent, costs not much energy and the cache stays spun down.

Yeah, there's not much you can do about this.  When the developers put Plex together, they did not plan on minimizing read/write access (nor should they).  Plex (like most applications) is intended to run 24x7 and be able to read/write at any time.  That's not a fault of Plex and I would expect any request to "fix" this would fall on deaf ears because that would not be normal.

 

Because you are using the cache drive for one or more applications, the cache disk will never spin down.  This is completely, normal behavior.  The only way to get the cache drive to spin down is to either stop all running applications or run those applications on a system other than unRAID.

Well, it appears the best solution will be to go with a SSD drive specifically for PLEX since that's all I am using the 2TB drive for anyway.  I could use that 2TB for storage instead.  I will look into buying a SSD drive for this.

 

Thanks everyone!

 

Now, the question become, how to move Plex to the SSD drive without losing all the information?  Or should I just re-install everything from scratch?

I think I did it this way:

Stop plex.

Make sure the ssd is mounted on boot.

Move the data to the ssd.

Change the path to point to the ssd.

Reenable plex.

FWIW, you can save money by getting a smaller SSD (like 32-64gb) and then mounting it external to the array.  That way you can be sure you still have a big enough cache drive for your max daily write volume, or even big enough to act as a warm spare for the array (read: as big as parity).