The 'Array' section of my 'Dashboard' warns that Disk 2 has 1 Smart Error. The 'Attributes' page of Disk 2 shows 8 reallocated sectors. Is this anything to worry about? I have attached screenshots, diagnostics and SMART check files.

tower-diagnostics-20241031-2155.zip tower-smart-20241031-2138.zip

It's lived a good life, time to replace.

As far as I understand it, error number 5 is one of the few SMART errors line to really considerate as an indication that a drive WILL fail soon.

This statistic data is from big data center lie backblaze : https://horizontechnology.com/news/smart-attributes-for-predicting-hdd-failure/ (near the bottom of the article)

Thanks for the responses - I checked https://horizontechnology.com/news/smart-attributes-for-predicting-hdd-failure/ and the only predictor of drive failure that my drive has is attribute ID 5. My extended SMART self-test shows 8 ID 5 (reallocated sectors) with a threshold of 10, so the drive hasn't reached the threshold yet. The other predictors (ID 187, 188, 197, 198) are all zero.

 

I want to play it safe, but I don't want to replace a HDD needlessly. I understand that nobody can predict a HDD's failure, but would I be over-cautious to replace this HDD, with the only predictor of failure not having even reached the threshold yet?

In theory reallocated sectors are do not in themselves indicate a problem as long as they remain stable.    However if they start increasing then that is a good indication that the disk is likely to fail soon.

12 hours ago, Steviewunda said:

The other predictors (ID 187, 188, 197, 198) are all zero.

 

You have to take into account the age of the drive, too - and if another drive fails you will be relying this dodgy drive to rebuild it, a process which puts the drive under the most stress. The drive is telling you ahead of time, I'd listen to it.

 

Thanks Michael