Hard drives are noisy, but IMO, that is not a good hard drive sound. You’ll need to figure out which drive it is. Sounds like it is beginning to fail mechanically.
ok… i do have have backups, but not for everything as i need bigger external drives.. I only backup important stuff i can’t loose, looks like those 4TB external usb drives will come in handy now
@dosborne Yes, SMART status for all drives are ok, and health also appears good too.. I have not looked at SMART logs only took face vale at the GUI, but i’ll give that a look.
I’m not sure if the SMART diagnosis includes such things as mechanical failures of the mechanism in the drive or just things like bad sectors, etc. I have just learned over the years that a scratching or grinding sounds or loud clicking is generally not a good sign and drive failure is imminent.
If I were you, I would immediately buy a very large backup drive and start backing up all that “non-essential” stuff. I’ve got terabytes of “non-essential” items that I would hate to lose.