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What does "ECC Bytes" under Storage->ATA means?


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This is my first post, so again - Hello to everyone :)


What does the "ECC Bytes" position under Storage -> ATA means? Aren't the HDDs suppose to have the same amount of ECC bytes (50 on 512b and 100 on 4K Advanced Format disks)?


I have HDDs from few manufacturers and:


Seagate ST3120026A  - ECC Bytes: 4

Seagate ST3250410AS - ECC Bytes: 4

Hitachi 160GB 2,5" SATA - ECC Bytes: 4

WD WD6400AAKS - ECC Bytes: 50 (this looks like I thought all disks should looks)


and the best:

Toshiba MQ-01ABD100 (from ADATA CH11 External USB3 drive - the drive is AF 4K) - ECC Bytes: 0 (yes - zero! - Tried to read it via USB and via SATA)


What does it means?

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