My thanks to everybody who has responded here. I think the prudent thing to do is use a new SSD card and I have one that is supposed to be a full 32 gb. The card I was able to finally clear the partitions on is several years old but I think it is still good but the suggestion to use it in a less mission critical application is a good idea plus it is not a full 32 gb.
I have a radio receiver that can store information on one of these cards and I'll use it for that since if there turns out to be a bad cell somewhere, the world won't end like it can if one's kernel or sector information becomes corrupted if it happens to land in a vital piece of code. Again, many thanks. Martin McCormick