Array has 1 disk with read errors, Disk 2 in error state (disk dsbl)

[Majawat]

I had this same problem with Disk 5 previously: 

I was able to get it back online via the helpful instructions by Constructor, shown here: https://wiki.unraid.net/Troubleshooting#Re-enable_the_drive

 

I do plan on performing those steps to get this drive back up. It's also one of my older drives. But I have a few questions:

 

• Should I be worried that a second drive has went into disk dsbl?
• What can I do to prevent this from happening to these or other drives?
• What caused this/the other drive to go into disk dsbl in the first place?
• Is there anything else I should know before continuing?

 

diagnostics attached.

 

 

hathor-diagnostics-20191112-1301.zip

[JorgeB]

Disk2 dropped offline, so more likely there's a power/connection problem, but since it dropped there's no SMART, check connections and post new diags.