I highly recommend something like the inexpensive APC R-1200 series. Generally about $100.

I have actually replaced all 4 drives now due to the same issue, all with about the same amount of hours.. 

My computer was damaged in an electrical storm a few years back so your comment regarding power makes sense.

I was also unaware that i could re-certify the drives, ill remember that for next time.

Thanks again.

It appears the issue sis the volumes directory is damaged.

You will need to either restore from backup, or get Disk Warrior, which can most likely, easily replace the directory so the volume is mountable again. Yes, disk Warrior is a commercial product, but it is very good at what it does.

I note both your drives had 8 unreliable sectors. that appears most often where there was a power issue, FYI. Do you have a voltage regulator on your system?
You may have been able to "certify" the drives in question and if they pass (put those 8 sectors back to normal), then get or eyears out of them. 5600 hours is young for two drives to fail.

however disk utility shows the volume and its 4 disks mounted, but i have no access to it.

I have recently updated to 7.6.1, and have reinstalled the driver several times and given full disk access and aloud in privacy settings as that seemed to be a leading solution after reading through the forums.

Looks like you need to run Disk Warrior on it (to rebuild the directory)

What is that drive with the 80,000 reallocated sectors and 70,000 unreliable sectors? that is going to cause havoc on your machine/data. Why do you have it connected?

Can't understand why this happened, but I'll try your suggestion with disk warrior.

The drive you mention, it's an old drive that's not even connected, but the software remind me every day that the disk it's a wrap

Thank you, I'll keep you posted.

Looks like you need to run Disk Warrior on it (to rebuild the directory)

What is that drive with the 80,000 reallocated sectors and 70,000 unreliable sectors? that is going to cause havoc on your machine/data. Why do you have it connected?

Left my Raid copying files for a backup for a long time and after a couple of days I switched it on and it doesn't mount...

Tech support file attached.

thank you

@mercymustard 

If you "reinstall SoftRAID driver", you should get a prompt if you wait a minute by MacOS. Click System Preferences and it will jump right there.

I don't have a photo handy, but can capture one if you are still unable to get there.

Worked for me... New M1 Pro MacBook Pro 2021, MacOS 12.5.1, SoftRAID 6.3 migrated. Had to reinstall driver and Allow process. You know it's going to work when the pop-up shows up (then quickly disappears saying), "reinstalling..." at restart in System Preferences. Good to go. 

Exactly what I would have recommended. Glad you figured it out.

This seemed to work and the drive is now mounting successfully. I hope this info helps another.