Subject: Re: mp->mnt_vnodelist change
To: None <>
From: Manuel Bouyer <>
List: tech-kern
Date: 10/18/2006 20:51:34
On Wed, Oct 18, 2006 at 08:34:46PM +0200, Reinoud Zandijk wrote:
> [...]
> Normal discs dont mind that but media like CD/DVD *hate* that and due to 
> their nature, writing with decending adresses takes around 10 times as much 
> time as writing ascending adresses if not more. In fact the current 
> implementation is faster in synchronious mount rather than asynchronious 
> mount for that reason.

I think this can affect normal disks as well; e.g. hardware RAID controllers
which have heuristics to detect sequencial writes.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference