Date: Fri, 1 Apr 2011 12:38:43 -0500 From: Adam Vande More <amvandemore@gmail.com> To: Chris H <chris#@1command.com> Cc: mlerota@claresco.hr, freebsd-stable@freebsd.org Subject: Re: Constant rebooting after power loss Message-ID: <AANLkTi=KEwmm1hM6Z=r_SWUAn9KhUrkTVzfF6VmqQauW@mail.gmail.com> In-Reply-To: <7b15d37d28f8ddac9eb81e4390231c96.HRCIM@webmail.1command.com> References: <87d3l6p5xv.fsf@cosmos.claresco.hr> <AANLkTi=kEyz-mKLzdV8LAf91ZhMTP8gLKs=3Eu5WD8mh@mail.gmail.com> <874o6ip0ak.fsf@cosmos.claresco.hr> <7b15d37d28f8ddac9eb81e4390231c96.HRCIM@webmail.1command.com>
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On Fri, Apr 1, 2011 at 12:02 PM, Chris H <chris#@1command.com> wrote: > On Fri, April 1, 2011 6:29 am, Marko Lerota wrote: > > I read that ZFS don't need fsck because the files are always consistent > on > filesystem regardless > > of power loses. That the corruption can occur only if disks are damaged. > But not > > when power goes down. > > Complete nonsense. The information you read was false. > No, it's really not. ZFS's lack of recovery tools at least in the beginning were basically non existent. This is because ZFS uses a COW model with an atomic data management unit design which by it's nature addresses thing like fsck, and sudden power loss. However, things outside of a FS's control still allow corrution to happen so as UPS is just as important with ZFS as your traditional FS. Perhaps more important because the difficulty from recovering from some types of pool corruption. -- Adam Vande More
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