Your drive boots or is recognized (often very slowly), but the recovery or transfer of the data isn’t possible or practical.
A RAID system or NAS drive that no longer detects can be caused by a myriad of potential issues.
Strange noises are a sure sign of physical damage to your hard drive.
Your HDD doesn’t make any noise when your computer is turned on. This is usually a hardware problem.
If the drive is connected and configured correctly and still doesn’t detect, it’s time for our services.