Subject: Re: Disk tuning and bad sectors
To: Richard Tobin <email@example.com>
From: Chris G. Demetriou <firstname.lastname@example.org>
Date: 11/07/1994 10:06:24
> > A while back I remember someone talking about the min % free for 1GB
> > drives. What is a reasonable minimum % for these larger drives?
> I believe Chris Torek posted some figures a couple of years ago that
> suggested that there was negligible degradation with 5%, and that it
> didn't really get bad until about 2%. I use 5%.
perhaps, and i believe that by default, in 4.4BSD, the value was
However, between 4.4 and 4.4-Lite, Kirk McKusick decided (i dunno if
the decision was backed up by measurements, or what; i can only assume
he had good reason) to bump it back up to 10%: apparently, if you're
doing clustering, the extra 5% gives you enough more contiguous blocks
that it _does_ once again make a performance difference...