the original order from dell can viewed here.

This is a Dell PowerEdge R330 with the following configuration:

• Intel Xeon E3-1270 3,8GHz, 4C/8T (72Watt)
• 16GB UDIMM
• 10k RPM SAS 2.5 inch 600GB (3x)
• 240Gig SSD 6Gbps 2.5 inch (2x)
• PERC H730 RAID controller (in host mode, we don't use hardware RAID)

Ubuntu 16.04 LTS is installed on md0, which is a software RAID1 of the 2 240 Gig SSD's :

cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10] 
md0 : active raid1 sda1[0] sdb1[1]
      224574464 blocks super 1.2 [2/2] [UU]
      bitmap: 1/2 pages [4KB], 65536KB chunk

The other 3 HD's are placed in a mirror to provide redundancy. A ZFS datapool is created to provide this feature.

zpool status
  pool: data
 state: ONLINE
  scan: scrub repaired 0 in 0h7m with 0 errors on Sun Mar 11 00:31:09 2018
config:

        NAME        STATE     READ WRITE CKSUM
        data        ONLINE       0     0     0
          mirror-0  ONLINE       0     0     0
            sdc     ONLINE       0     0     0
            sdd     ONLINE       0     0     0
            sde     ONLINE       0     0     0

errors: No known data errors

This provides us with 560Gb of storage, for websites, etc…

zpool list
NAME   SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
data   556G  39.2G   517G         -     1%     7%  1.00x  ONLINE  -