Date: Tue, 29 Jan 2013 14:01:13 -0700 (MST) From: Warren Block <wblock@wonkity.com> To: Artem Kuchin <matrix@itlegion.ru> Cc: freebsd-questions@freebsd.org Subject: Re: Software raid VS hardware raid Message-ID: <alpine.BSF.2.00.1301291353570.30931@wonkity.com> In-Reply-To: <5107FC3C.4030701@itlegion.ru> References: <5106E301.4070707@itlegion.ru> <ke7v7a$r0d$1@ger.gmane.org> <5107A500.4030902@itlegion.ru> <alpine.BSF.2.00.1301290749460.27370@wonkity.com> <5107FC3C.4030701@itlegion.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 29 Jan 2013, Artem Kuchin wrote: > > 29.01.2013 18:57, Warren Block: >> On Tue, 29 Jan 2013, Artem Kuchin wrote: >> >> The Handbook chapter on gmirror talks about the problems with GPT and GEOM >> metadata. In short: right now, they conflict. It's possible to mirror GPT >> partitions, but be aware that if you mirror more than one partition on a >> drive, a rebuild after replacing a drive could thrash the heads as mirrors >> are rebuilt simultaneously. >> >> http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-mirror.html >> >> > > So, > gmirror+GPT=conflict on last sector > GPT+gmirror = hardrive head kill > > nice... > > So, for no more than 2TB disks the best way to go is GMIRROR of the drive > +PARTITION on top of it? GPT partitions should work, just limit it to one mirrored partition per drive. > Or maybe there is a way to instruct gmirror do rebuild only what i say > (manual rebuild) ? 'gmirror configure -n' ? Have not tried it. The trick would be to do that before multiple mirrors start rebuilding, which they will as soon as geom_mirror.ko is loaded.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?alpine.BSF.2.00.1301291353570.30931>