centuryold

I had an issue a week ago which caused me to have to reformat my cache disk. Now everytime I reboot my server it says cache disk has wrong encryption key file. Last time I saw this. I was pissed but reformated my drive and rebuilt all the vm's etc. I aol mail login had backups at least. But, I had to reboot today and same issue. Can somebody assist why this keeps happening? Settings is set to btrf encrypted so everything seems set right. I had to leave house. But when I get home. Wonder if I can cryptsetup ....... To decrypt and open the cache disk?