[05] = The ID of the attribute is 5
100/5 = Score is currently 100, firmware considers critical if below 5
Worst: 100 = The lowest the score has been recorded is 100
524360 = Actual number of reallocated sectors is 524,360
Over 2 gigabytes have been reallocated. It makes no sense the score is still 100, which is as high as it gets with most attributes. How many millions of reallocations would be necessary to lower the score to 5 then? As for the previous screenshots, "This device is working properly" means nothing for HDD health (it is the Device Manager status for drivers). Fragmentation is unrelated to the condition of the HDD.
chkdsk
only reports errors once the filesystem is damaged, which may not occur if all reallocations are successful.
I have the same model, and it is completely free of errors after 19,900 hours except for a Reallocation Event Count of 36, which started in 2021. The Current Pending Sector Count has always been 0, and the Reallocated Sector Count is 0. How could there be any attempts to reallocate sectors if there have been no successful or unsuccessful attempts? When the Reallocation Event Count increased above 0, the Power Off Retract Count increased to above 1 million, and is now around 3 million. That's obviously not correct, because the total number of spindowns is only 36,000. These models tend to be very reliable disks, with relatively common occurrences of errors with reporting attributes, but that doesn't mean 524,360 reallocations should be dismissed.
Backup the entire disk immediately, and backup all new contents every day. If your intention is to easily restore an entire OS, you should create a full disk image. Imaging the disk requires 500 GB of free space on another disk. This can be done within Windows with proprietary subscription software, but if the files on the disk are important to you, you should not attempt to run Windows while backing up. Instead, use a different computer to create a bootable
Linux Mint pen drive with
Rufus. Shut down the defective computer, hold F2 and press the power button to turn it on again. Use F6 to move the pen drive up the list in the Boot tab. Exit Saving Changes from the Exit tab. Connect an external HDD, open the Disks tool and click the upper-right menu icon, and choose Create Disk Image.
Once the disk is backed up, if you are in Windows, download
smartmontools and open a Command Prompt as administrator. Input
smartctl -t short /dev/sda
and wait 5 minutes. Use
smartctl -l selftest /dev/sda
to check the results. Download
openSeaChest and type
cd C:\Users\[username]\Downloads\openSeaChest_Windows_x64
and press enter. Input
OpenSeaChest_GenericTests --shortGeneric -d PD0
. Use
OpenSeaChest_GenericTests --longGeneric -d PD0
for a more thorough inspection.
If you are in Linux Mint, open a terminal and input
sudo apt install smartmontools
and
sudo smartctl -t short /dev/sda
. After 5 minutes, input
sudo smartctl -l selftest /dev/sda
to check results. Download the CentOS package for openSeaChest and use
cd /home/mint/Downloads/openseachest_exes_CentOS7_x86_64/
and
sudo ./openSeaChest_GenericTests --shortGeneric -d /dev/sda
. Yes, the CentOS package should work.