Remove inactive volumes to use the disk. Disk #1,2. troubleshooting

bizmate wrote:

If so what steps should i take to do so? 

- format the disks once mounted in bays 1,2,4?
- how do i get back all the folders, auth info, etc
-  after i can just copy back the data added manually and run my backup scripts from my PCs 

I missed this.   In this case, reducing from 4 to 3 drives is your best solution.  Based on your posts, I think you have the Linux skills to accomplish it.  But if in doubt, post and I'll help.

Here is what you can do as an alternative:

Since you can now access the admin interface, the first thing you want to do is backup the configuration.  If you have apps you don't intend to use again, uninstall them before you do that.  It's actually best if you uninstall all apps first.   If your use as a "media server" includes using an app, then somebody else will have to instruct you on how to back up it's database.

At this point, you can factory default and restore the configuration.  Any apps you didn't delete first should be re-installed  before restoring the configuration file.

Alternately, you can delete the existing volume and create a new one.  It's not as "clean" as a factory default, but it can be of use in saving configuration.  Note that any apps may seem to still be there, but they are not.  I order to save apps, you have to follow steps similar to what's here: How-to-save-your-apps-when-destroying-your-main-volume.  But since you don't have a second volume, you'll have to save the data elsewhere.  The OS partition is OK for that in the short term if none of the apps have a large database, log file, etc.  A USB drive is probably better.