From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tyler Subject: Re: linux-raid compatable w/ Adaptec AIC-7902? Date: Fri, 08 Jul 2005 16:20:08 -0700 Message-ID: <42CF0A28.9080603@dtbb.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Mark Hahn Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Mark Hahn wrote: >>>>> md0 /boot sd[ab]1 >>>>> md1 / sd[ab]2 >>>>> md2 /usr sd[ab]3 >>>>> md3 /var sd[ab]4 >>>>> >>>>> >... > > >>There are other reasons to use multiple partitions. Having /home as a >>separate partition, e.g., allows one to reinstall without copying the data >>off to another machine. It also prevents a user from filling up the root >>fs, which often has bad consequences. The same goes for partitions for >>/tmp and/or /var. >> >> > >one very serious problem with this approach is that each filesystem >will probably be journaled, which means that it'll spend a lot of time >shuttling the heads between journal and data areas. if you have activity >on /, /usr and /var at the same time, your heads will do little other >than rush madly around. in cases where this can't be avoided (for instance, >using quotas to eliminate the user-fills-partition problem), you can >often improve things markedly by turning on noatime/nodiratime. > > > Also, depending on the file system, you can set reserved space percentage for root with tools such as tune2fs. Tyler.