Date: Wed, 6 Feb 2008 12:37:41 +0200 From: Andrei Kolu <antik@bsd.ee> To: freebsd-fs@freebsd.org Subject: Re: Forcing full file read in ZFS even when checksum error encountered Message-ID: <200802061237.41660.antik@bsd.ee> In-Reply-To: <86prvav1ot.fsf@ds4.des.no> References: <47A73C8D.3000107@skyrush.com> <20080205192137.GA66362@eos.sc1.parodius.com> <86prvav1ot.fsf@ds4.des.no>
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On Wednesday 06 February 2008 12:06:42 Dag-Erling Sm=C3=B8rgrav wrote: > Jeremy Chadwick <koitsu@freebsd.org> writes: > > I realise I classify pretty much everything as "priority 0" (of utmost > > importance), but there doesn't appear to be any indication of anyone > > caring about this problem. > > Most likely, nobody with the ability to find and fix the cause of your > problem has been able to reproduce it. It's really hard to fix a bug > you can't reproduce; you're basically flying blind, unless the person > who reported the issue is very experienced and can cooperate in > diagnosing the problem (which is very rare). > > > I want to do more to help, but I don't know what I *can* do, besides > > offer to buy people identical hardware for attempted reproduction, or > > put up a test box with serial console access for developers to beat up > > on. > > Several developers already *have* identical hardware, or nearly so. > > (speaking for myself, all my Seagate disks are dead, and I use Western > Digital exclusively these days, as they tend to live longer in my > experience; sometimes they don't even fail until *after* the warranty > runs out!) I have exactly opposite experience- all my WD drives are dead and only Seag= ate=20 survived. Actually I'd recommend to use as many different manufacturers as= =20 possible. For example in NAS with 4-8 hard drives I got at least two=20 different drives- Seagate and Hitachi- in case of some bad model (or bad da= y=20 in manufacturer plant) you'll not loose all drives in short period of time.= =2E.=20 There is no such a thing like bad brand- there is bad models or bad days...
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