My system takes about 15 minutes to boot up. Finally I did a diagnostic test and here is what I got.,
TESTING: WDC WD6400 AAKS-65A7B0 (WD-WMASY1490474 Drive
Error Code: B10HD8
Error: A Smart test failed on Drive
Suggestion: Backup your important data
TESTING: WDC WD6400 AAKS-65A7B0 (WD-WMASY1490474 Drive
Error Code: B10HD8
Error: A Smart test failed on Drive
Suggestion: Backup your important data