I have an existing 160 GB SATA hard drive, where my operating system and softwares were installed. But when i added 500 GB HDD SATA, that new 500 GB HDD sometimes is not detected.
Yes, I already checked the sata connection and power supply, and I think it's ok. That HDD has no partition and I use it only for my music and movie files.
Motherboard: MSI 945GZM3
Processor: 3.4 Ghz Pentium D