DOS ain't dead - Defragmentation FAT32 volumes

Defragmentation FAT32 volumes (Users)

posted by marcov, 08.07.2008, 12:48

> > Note that not every fragmentation is a drive movement. Cylinders are
> > probably also way bigger. So if the HD driver tries to place fragments
> > near, it will still be read/written in a single spin.
>
> The only time this would be the case is if the hd driver read the data
> after the requested sectors in the original call. Otherwise, the drive
> would read the requested cluster and continue spinning, getting the next
> requested cluster on the next spin.

Well, I thought that was NCQ was for to exploit such benefits that up ? Moreover, on the next spin is still way cheaper than a seek.

Admitted, it will probably hard to get something NCQ for Dos, and the same for a smart filesystem driver that would try to place data near.

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Complete thread:

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