Date: Wed, 11 May 2005 11:42:02 -0600 From: secmgr <security@jim-liesl.org> To: peter.orlowski@physik.tu-berlin.de Cc: freebsd-stable@freebsd.org Subject: Re: State of gvinum RELENG_5 or RELENG_5_4 ?! Message-ID: <428243EA.9070707@jim-liesl.org> In-Reply-To: <20050511095142.GA12629@ella.physik.tu-berlin.de> References: <8b6eae96050510071037d3b6e4@mail.gmail.com> <4280C277.4030904@jim-liesl.org> <27C1250C-9BFD-4FA8-876C-09DF5504B058@isncom.com> <4280EE3C.8050505@jim-liesl.org> <20050511095142.GA12629@ella.physik.tu-berlin.de>
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Peter Orlowski wrote: >On Tue, May 10, 2005 at 11:24:12AM -0600, secmgr wrote: > > >>Gabor Esperon wrote: >> >> >>>How reliable is the gmirror subsystem? >>> >>> >>gmirror seems fine as best as I can tell. I've been running it for a >>few months on sata drives. >> >> > >I had gmirror running on two IDE drives for system and two SATA >drives for user data. That was RELENG_5_3. When one of the SATA >drives broke (later I got errors like > >ad4: FAILURE - READ_DMA status=51<READY,DSC,ERROR> > >on fscking) the whole system just stopped. I could switch >consoles but nothing else. Nothing in the logs either. I believe >it had lost all it's file systems. > >After power cycling, both mirrors were found but marked as broken. >Gmirror chose the defective SATA disk as the intact one and started >rebuilding the mirror from that - but fscking the mirror failed, >obviously, so I ended up with one disk that was broken, but marked intact >by gmirror and one disk the other way round. > >I had to erase the gmirror metadata on the intact disk to get it >to work again. > >I'd say gmirror will save your data but it won't save you from some >downtime... > >Greetings, Peter > > > What steps did you take to the gmirror the disk so you could get your data back? At this point, I'm thinking that as far as S/W RAID goes in FreeBSD, the "R" is pretty meaningless jim
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