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Sounds like the heads are having trouble accessing a portion of the drive platters. Not surprising if it's the original drive in a 5 year old laptop that's been regularly used since it was new.

I would open up Console.app and monitor it for any read or write-related error messages.

Drives are cheap. < $100 for one twice the size of what you currently have, and most likely faster too. Right now, < $200 for an SSD that's twice the size of what you currently have, thanks to all the Black Friday deals.

... And "no", your drive is not dead yet. If it were, you wouldn't be able to post to the forums at all using it. It does sound like it's starting to fail though.
 
I agree with the poster above who suggested that now's the time to upgrade to an SSD.

There are sales all over the place and you can find one cheap.
Check dealnews.com to see what's available.

Check ifixit.com for the repair guide for drive replacement on the 2010 MacBook Pro.

The job is very easy (maybe 15 minutes), but YOU HAVE TO USE THE RIGHT TOOLS.
You'll need a Phillips #00 driver and a TORX T-6 driver.

You might also consider picking up either:
- a USB3 external enclosure
- a USB3/SATA dock
- a USB3/SATA "dongle" adapter

With any of these, you can connect the SSD externally and set it up before you install it inside. You may also be able to use it with the old HDD after you do the swap.
 
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