From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Leslie Rhorer" Subject: RE: Events? Date: Sat, 30 May 2009 20:37:13 -0500 Message-ID: <20090531013717425.YKVV5991@cdptpa-omta01.mail.rr.com> References: <18977.43320.811246.171065@notabene.brown> Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <18977.43320.811246.171065@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids > -----Original Message----- > From: Neil Brown [mailto:neilb@suse.de] > Sent: Saturday, May 30, 2009 4:47 PM > To: lrhorer@satx.rr.com > Cc: linux-raid@vger.kernel.org > Subject: Re: Events? > > On Saturday May 30, lrhorer@satx.rr.com wrote: > > > > What does the "Events" field reported by -Dt signify, and why does the > > number sometimes decrease? I've seen the number change, but I don't see > > anything in any of the system logs corresponding to something that would > > seem to relate. > > Changes just as device failure and adding or removing a device. > Also transitions from 'active' to 'clean' and back. OK, but shouldn't these transitions at least be logged somewhere? > Sometimes the dirty->transition causes the event counter to retreat if > md is use the new 'clean' state is indistinguishable from the old > 'clean' state. This allows us not to always be waking up spare drives > just to tell them about clean->active->clean transitions. That makes sense, but I think the admin should be able to inspect the details of the transactions.