Hello,

just to rule out a possible issue point, how long ago was the cmos battery changed ?

Hi, Thank you for your quick response. 

I didn't change it for more than 5 years.  But I did replace the battery when I had this no hard drives found issue.  And the issue is still there.

@Hubsuite​ Have you tried moving the card to a different slot ? ( to rule out that the slot developed a problem )

moving LSI SAS card to a different slot?  

@Hubsuite​ ignore, my bad

Cards in general can fail, but I think it happens more often in GPU's.

I'd try How to Perform a BIOS or CMOS Reset and Clear the NVRAM on Dell Computers

If that doesn't work, then try replacing the LSI SAS card.

@bradthetechnut​ is not a card, is integrated on the motherboard

It's integrated LSI SAS and the whole motherboard may need to be upgraded if it's LSI SAS controller issue.  

Or a substitute card could be added 

https://www.ebay.com/itm/134490164220 

by example

Thank you.  Checked the link it's "9300-8i LSI SAS3008 8-Port 12Gb PCIe IT mode ZFS FreeNAS unRAID US".  Is anyway I can check the compatibity with additional controller in my Dell T7910 model?