bad blocks, the best way to find it

[BenGonGon]

Hello,

I want to know the best way to find any bad block on HDD without stopping to use service?

I have read many posts and I cannot determine the good one.

Thank you for help and best regards,

 

[kdragon75]

To actually fully test each block generally required destructive writes. This means erasing the entire hard drive. You can also run a smart long test that will read all of the disk and monitor for read errors only.

 

[BenGonGon]

I am in RAID Z2
if I perform a destructive on 1 disk, i cannot reconstruct it after?

 

[kdragon75]

I am in RAID Z2
if I perform a destructive on 1 disk, i cannot reconstruct it after?

You can but unless you suspect a bad disk, I would not take the chance.

 

[BenGonGon]

Ok, it is a bad idea to use

Code:

badblocks

command

For have a full report do i use ?

Code:

smartctl -x -t long /dev/ada<x>