Hello,

i want to create 2 separate RAIDs

 

1: 2 SSDs for VM an Applications

2: 3 (and later more...) NAS Drives  for Media files with slower Discs

 

Is that possible, because there is only one "Array"?

 

Thanks for helping

Yes, that's possible but they are different implementations.

 

For your data array unRAID supports software RAID.  You'll pick one drive to be your parity drive, and the others to be your data drives.  unRAID will provide data redundancy using it's software RAID implementation.

 

For your applications you will want to use the cache drive.  Pick BTRFS for the file system of the cache drive.  unRAID gives you the ability to add additional devices to cache, making it a cache pool.  By default BTRFS RAID 1 will be used, giving you data redundancy at the file system level.  Note that this works best when the SSDs are of a similar size.

Ok, thanks for the answer!

 

So i use the Cache Devices as the second RAID, but i have two more questions.

 

Do i have (for future) no cache feature?

And what should i do that the cache RAID shows up as disk/share?

 

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Sorry, i have found it.

Make a new share, hit Cache only, done

The cache drive can support being used both as an application drive and for high speed caching of writes to the array.

 

When you start setting up Docker you'll want to define a share called "appdata" as "Use Cache Disk" - "Only".  This will setup a folder on your cache drive for your docker image and the supporting data files for each of your dockers.  By specifying cache only the contents of "appdata" will not be moved to the array.  The rest of your cache drive will still be available to cache writes to the array if you choose (I actually find that writes to the array are fast enough for my needs and don't use write caching).  When you create a share for Documents or Backup (for instance), just specify "Use Cache Drive" - "Yes" to make use of high speed write caching.  unRAID will automatically create any needed folders on the cache drive.

 

When you start installing dockers you'll install to /mnt/cache/appdata.  By the way - the Community Applications plugin is essential for setting up dockers and the Fix Common Problems plugin will do things like make sure your appdata folder is in the right place.