Ok, i've got confirmation that disk are indeed with that part number, so thats a relief. We also replaced WD green SSD disks with better drives, samsung - Dell Part A8173673 they are not server graded and don't hold data in cache in case of power faliure, but they have near bottom line spec, as alternative and 5 year warranty. In addition it's not demanding aplication, and we have cluster with 3 servers an RAID's with APC UPS, so we got it all covered. Thanks for all your help.
Recently we purchased 3 Dell servers:
R230 poweredge disks...