Unable to read everything due to uncorrectable ECC errors

Same symptom as the original -- critical filesystem sectors that are not usually rewritten are returning uncorrectable ECC errors, and other evidence of bit rot.

Leave it alone for a month and it can't read some of it (uncorrectable ECC errors).

Both R/W errors began to rise along with Reallocated sectors

Both R/W errors began to rise along with Reallocated sectors

Both R/W errors began to rise along with Reallocated sectors