Date: Sat, 16 Jul 2005 16:07:54 +0200 From: Matthias Buelow <mkb@incubus.de> To: freebsd-stable@freebsd.org Subject: Re: dangerous situation with shutdown process Message-ID: <20050716140754.GA752@drjekyll.mkbuelow.net> In-Reply-To: <20050716101657.GA44786@pc5.i.0x5.de> References: <20050715224650.GA48516@outcold.yadt.co.uk> <200507152342.j6FNg5Tx015427@drjekyll.mkbuelow.net> <20050716101657.GA44786@pc5.i.0x5.de>
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Nicolas Rachinsky wrote: >> >The track which is corrupted could contain data that wasn't written >> >to in months. How would the journal help? >> >> I don't understand this question. > >The track destroyed could contain sectors which are in no way related >to the sectors the OS is writing to. And in what way is that related to the existence or nonexistence of write barriers and a journal? If you pound the disk with a hammer, it will most likely break, no matter what strategy you're using. That you cannot eliminate _all_ sources of error with a strategy doesn't mean that you shouldn't implement it to minimize the number of errors that could happen. Besides, I always thought that (most) disks had enough power reserve to be able to write at least one track when power goes away? Or is that an urban myth, I don't know for sure. mkb.
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