Problem with HDD, Stripe

Hi there

I have a problem with my Raid 0/Stripe Array. One disk /dev/sde is causing some strange errors and my syslog gets filled up like crazy. I really don't know what the problem is.
But I have observed two strange things with my array.

1. At some point in time OMV reported that my array (md127) wasn't mounted, but it was still browsable from the terminal. (almost no files where there but part of the folder structure was)
2. Due to some errors my array gets remounted in read-only mode.
3. My drive /dev/sde has one out of spec value reported by S.M.A.R.T.

   
   

   1. === START OF INFORMATION SECTION ===
      
      Model Family: Western Digital Blue
      Device Model: WDC WD5000AAKX-603CA0
      Serial Number: WD-WCAYUCC87091
      LU WWN Device Id: 5 0014ee 1aef69b6d
      Firmware Version: 18.01H18
      User Capacity: 500,107,862,016 bytes [500 GB]
      Sector Size: 512 bytes logical/physical
      Rotation Rate: 7200 rpm
      Form Factor: 3.5 inches
      Device is: In smartctl database [for details use: -P show]
      ATA Version is: ATA8-ACS (minor revision not indicated)
      SATA Version is: SATA 3.0, 6.0 Gb/s (current: 1.5 Gb/s)
      Local Time is: Fri Nov 19 23:46:53 2021 CET
      SMART support is: Available - device has SMART capability.
      SMART support is: Enabled
   2. Link Speed is 1.5 Gb/s instead of 6 Gb/s ?! Is my drive failing?
4. My Syslog and S.M.A.R.T output of drive /dev/sde are in the Attachments. syslog.txt and SMART.txt

What's wrong?

Thank you for your help!

Thank you for your response.

What do I need to look out for to detect a failing drive? I only looked at theReallocated_Event_Count.

And yes I'm aware of my data loss if one drive fails.

Thank you for the link and clarification!