It reads like your hard drive has had a catastrophic failure and replacing it is the only answer. You could check with Dell Tech, Support about the replacement date and procedures.
If my answer was helpful, please use the 'Did this answer the question' and click: YesForum Member since 2001I am not employed by Dell
It sounds like you are having a S.M.A.R.T. error. If this is true, the drive is toast. See the link:
If you called tech support, they should have given you a reference number of the dispatch. They had me call 1-800-433-9014 to check status of a parts order (It is a friendly computer) If that doesn't give you an answer on your service, call tech support again & find out why the delay. (Service calls are performed 8 to 5 Monday thru Friday)
Inspiron E1505 Windows 10 / XPS 10 Windows RT
Dimension 8400 Windows 7/8