Modern drives have spare hidden sectors/blocks in the case that some go bad. If there are bad sectors/bad blocks, it will try to read the data several times before timing out, notifying Windows, and marking the sectors/blocks as bad. If it's failing, it's just a matter of time before it gives up the ghost.Īlso, the reason for it running slow can be due to Windows waiting for the drive controller to report back. If the HDD is failing, I don't know why you'd be wasting time with all of that before backing it up/performing data recovery (if possible) and then running diagnostics to make sure the drive is sound. That doesn't get to the root cause however. Once done, then you can initialize and format the drive as NTFS. or CLEAN ALL to have it zero out all sectors on the drive (takes many hours to complete).

Type CLEAN to clear all partitions from the drive. Type LIST DISK to verify the disk is selected with an * by it

Type SELECT DISK X (where X is the drive you want to clear) Type LIST DISK (note which disk is the one you want to clear) I would use DISKPART from the command line (ran as Administrator)

Seatools ssd gui