USB HD drive reallocated sectors

Once something is written in SMART it stays there, no amount of formatting can change that. It being a removable drive it could be caused by SW or premature removal and things like that. Unless some real bad sectors are found it's not particularly worrisome. Just keep an eye on it.

Reallocated sectors are sectors that have been found to be faulty and have been remapped to use spare sectors from an area the drive has set aside for this purpose. The drive will be fully functional for now, but it is an indication of possible trouble later on, particularly if the current count of 400 increases with time.

According to Backblaze, who know a thing or two about predicting drive failures, the key warning signs to look for are...

Attribute		Description
SMART 5		Reallocated Sectors Count
SMART 187		Reported Uncorrectable Errors
SMART 188		Command Timeout
SMART 197		Current Pending Sector Count
SMART 198		Uncorrectable Sector Count

Read this blog from Backblaze for full details...
https://www.backblaze.com/blog/what-...rive-failures/

roy111 said:

Since I used it for backup i'll replace it, thanks!

Replace if you want to but keep it for less demanding tasks. I think it's still in a good enough shape, I have worse ones that still work fine.