Thanks for the lesson. Thats good to know.

In the late 1990's, I was taking some graphics (Photoshop, Illustrator
etc.)and I had a teacher tell me that I should back everything up and do a
clean install about once a year.

So, you are saying back then, it was okay but not a good thing on OS X?



> Reformatting a running drive shouldn't be necessary and is not advised.
>  Reformatting involves blowing away the soft bad-block map (the hard, aka
> manufacturer's, map is retained).  That leaves you with a file system that
> will potentially use marginal blocks for your data.
>
> The performance improvement, with the classic Mac OS, comes from the
> out-and-back defrag.   Backup, initialize the drive, reload it - the files
> are put on contiguously.  Unnecessary under OS X, as the same performance
> improvement there comes from running simple maintenance tasks.  OS X does
> the important defragging automatically.
>
> - Dan.
> --
> - Psychoceramic Emeritus; South Jersey, USA, Earth.
>
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