"T i m" wrote in message
...
On Wed, 19 Jun 2019 13:15:40 +1000, "Rod Speed"
wrote:

snip

You're thinking of the Red Book specification for CDs and DVDs

No I am not. I am thinking about the hard drive retrying writing
a sector when it doesn't initially succeed in writing a sector.

Let's see if we can think up a technical name for that so everyone
knows what we are talking about ... how about 'Read after write
verification and / or 'Bad block remapping'?

And are you sure it's always done in the drive, not also by the OS?

Yep, with modern hard drives it is.