From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mario 'BitKoenig' Holbe Subject: Re: Care and feeding of RAID? Date: Wed, 6 Sep 2006 09:33:14 +0200 Message-ID: References: <44FD722C.7050608@waldoware.com> <44FD91D1.7090501@maine.edu> <20060905154156.GB28548@scavenger.homeip.net> Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Benjamin Schieder wrote: > I have made the experience that long tests slow down the raid to a point > where the system becomes unusable. Even though we're quite off-topic here with that since it's more SMART-related... this is at least unusual. I'm also running regular SMART selftests (short daily, long weekly) and usually they don't affect drive's performance very much. However, whenever I experienced massive slow-downs while selftests are running, this did always point to disk problems... too much (and strategic disadvantageous) reallocated sectors (keep an ear on the disks, hear them seek()ing :)), non-reallocatable sectors or just temperature (for example, WD drives tend to show a bad performance when getting too hot). regards Mario -- But after a while I learned the trick of speaking fast. You don't have to think any faster; just use twice as many words to say everything. -- Paul Graham