Strange HDDSCAN results, consecutive bad blocks

I’m doing VR-Verify;

All bads are consecutive, starting at around ~20-22%, and the percentage hasn’t moved for the whole duration of bad blocks.

HDD was quite slow lately, especially on boot, could take up to 5-10 minutes to load every startup program, and takes about minute or two just to render desktop background after login. Save for slowness, never had major problems, but lately laptop was failing to properly wake up from sleep, so I decided to run the check and saw this.

Age ~4y, ~35K hours HDD on time.

Currently making a clone from disk image backups (incremental, never had failures due to unreadable drive yet)

Could it be that one bad block prevents further reading here and make every consecutive one fail?

I’ve also ran surface test from Hard Disk Sentinel, random reads this time, and at 10% it hasn’t found single bad block.

Right now I’m thinking to stop the test and try several others; number of slow blocks is good enough indication by itself.

Update:

Ran chkdsk /r overnight, haven’t noticed much in terms of errors, only that it couldn’t write logs or something of that kind, but that may be due to the fact that I was running it from LiveUSB.

After booting up and retrying the test, I’m getting the same results pretty much:

Bad blocks started at 22%, and I aborted the test