PS6500E + 48 x 2 TB HDD + RAID 50 = 69.25TB??

Hi all,

New to the forums and also new to EqualLogic systems in general (replaced a senior staff member who passed away).

I was given the order to re-setup our EqualLogic system (PS6500E) with 48x 2TB HDD's.
If I am not mistaken we should have 96 TB  (= 85.7 TiB) available according to all specifications I could find, however only 69.25 TB is available with RAID 10.

Can someone explain why I am only seeing 69.25 TB available instead of 96 TB?
I did notice 2 HDD's are spare, but still shouldn't that render 88 TB (= 82 TiB) available... Right?

A few things I checked myself;

- all 48 disks are recognised.
- all 48 disks are healthy and don't have errors
- running the latest firmware v8.1.1

Only thing I did notice is a low battery warning on controller 0, but that's charging now and I doubt it's causing the space "issue".

I did notice one thing in the "Event Log" As mentioned I created a RAID 50 array, but I saw this message: " Info     11-5-2016 16:31:25  PS6500E  14.2.4  Expanding drive array from 10 drives, RAID 10 to 14 drives, RAID 50."

Don't know if that message is of any importance.

Furthermore; there are currently 2 disks set as spare. Is it possible to set more disks as spare in general with EqualLogic?

I am very sorry if I am asking stupid questions, but as mentioned, I replaced a senior staff member (who suddenly passed away) and to be honest I have no experience at all with Equallogic in general. I guess it's a first time for everything.

Thank you in advance for your help and kind answers.

Regards