Date: Wed, 27 Aug 1997 11:31:07 -0500 From: Wm Brian McCane <root@bmccane.uit.net> To: Simon Shapiro <Shimon@i-Connect.Net> Cc: "burt f." <burt@focusplus.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: ? power outages and file system corruption Message-ID: <199708271631.LAA14906@bmccane.uit.net> In-Reply-To: Your message of "Mon, 25 Aug 1997 23:24:50 PDT." <XFMail.970825232450.Shimon@i-Connect.Net>
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> > Hi "burt f."; On 26-Aug-97 you wrote: > > > > > > Is the only way to protect against power-outage-caused file system > > corruption to install a UPS? Someone mentioned to me that Sun > > (yeah, i know it's Solaris, but i just wanted to know if there was > > something analogous in FBSD) has some sort of disk/FS caching to > > protect against this. > > In theory, a journaling filesystem will do that. Veritas is a good name > for these. The problem with most of these is that a $300 UPS is cheaper > and more reliable. Most such filesystems are attached to such an increase > in complexity that the most common cause of curruption is a filesystem code > bug. Even a UPS does not help you then. > > Simon > There is another benefit to buying a UPS. At my last job we used to lose power all the time (5-10 ton electric cranes). After I bought the UPS, the power outtages stopped. When I became self-employed, I bought a new UPS for my home computer, I haven't lost electrical power here for almost 2 years now. I feel this is empirical evidence that UPS' prevent power outtages 8->. brian
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