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Obi-Wan

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

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Hello.

 

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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It seems the latest ATA specification (and a few preceding revisions as well) treats the ECC bytes register field as obsolete.  We'll remove that information from AIDA64 to avoid confusion.


Thanks,

Fiery

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Hello.

Thanks for your reply. Maybe it is worth to delete that information only when the latest ATA spec is found on a disk? Or maybe only when that value is zero?

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The ATA spec treats the ECC bytes field obsolete for over 15 years now, so it's not since the previous spec release ;)

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Ahahah :D I thought that the change was made on the latest ATA8 spec :) But it is interesting, that many new HDDs report this value anyway, but not all of them. Thanx for reply, glad I could help in AIDA64 evolution. :)

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