Can Data Be Recovered From a Failed Hard Drive?
Often, yes, particularly if the drive is stopped from being used as soon as symptoms appear. Success depends heavily on the type and severity of the failure — a drive that's clicking or grinding still has data physically present, it's just becoming harder to access safely.
What improves the chances
Stopping use of the drive immediately once symptoms appear is the single biggest factor. Every additional power-on of a physically failing drive is an additional risk of it failing completely and becoming unreadable.
What reduces the chances
Continuing to use the drive, running disk repair or checking tools, or attempting DIY recovery software on a mechanically failing drive can all make the underlying problem worse and reduce what's ultimately recoverable.