How to monitor disk health without S.M.A.R.T.?

Hi everybody,

First of all, please apologize my poor English, as it is not my native language.

I have an OMV 4 setup with a MDADM raid 0 array on a odroid XU4 + cloudshell 2 (i discovered it was flawed and quite unreliable only after buying it ). This device is only able to monitor SMART data on one of the two disks of the array, and I don't even know if these data are correct (as it provides fake ones for the second disk…). The two disks are 4 To Seagate barracudas purchased in august 18.

As I have received SMART errors in the last few days, I was looking for a way to monitor the disks more accurately.
mdadm --detail gives me the following output:

Version : 1.2
  Creation Time : Mon Jul  2 19:03:40 2018
     Raid Level : raid0
     Array Size : 7813774336 (7451.80 GiB 8001.30 GB)
   Raid Devices : 2
  Total Devices : 2
    Persistence : Superblock is persistent


    Update Time : Mon Jul  2 19:03:40 2018
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0


     Chunk Size : 512K


           Name : odroidxu4:RAID0  (local to host odroidxu4)
           UUID : 2117d2c1:3429d122:5b09c403:67afeba2
         Events : 0


    Number   Major   Minor   RaidDevice State
       0       8        0        0      active sync   /dev/sda
       1       8       16        1      active sync   /dev/sdb

However, I failed to undersand what these "events" mean, and if they are relevant to monitor the disk health. As I understand it, it lists the time superblocks are moved ?

So I was wondering if someone here could provide me more informations on this matter, or maybe advice me another way to check if my disks are (or not) in bad shape ?

If relevant, the system report is below:
content1538834025.txt

Good Week-end everyone,

Hi Geaves, thanks for your reply!

I know that RAID 0 with a dev-board is a ""bold"" choice but all important data are encrypted and backed-up in a remote NAS and in the cloud. In fact i wanted the storage to be as fast as possible. Losing a drive wouldn't be too serious but i would like to be able to expect when it' more likely to occur.

As of the SMART panel on the OMV interface, it isn't able to give me reliable information as my setup has a buggy JMicron 561 raid controller wich only provide smart data for one disk (sda). Furthermore, since the last OMV update even that doesn't work anymore: checking the smart panel keeps refreshing it and the cpu goes to 100% "wait".

Anyway, thanks for your help and have a good day