Date: Tue, 13 Mar 2007 15:45:16 -0400 From: "David Robillard" <david.robillard@gmail.com> To: "FreeBSD Questions" <freebsd-questions@freebsd.org> Cc: Steve Franks <stevefranks@ieee.org> Subject: Re: mirror without destroying existing contents Message-ID: <226ae0c60703131245k6a9774f5ub3f26da690dda22d@mail.gmail.com>
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>> Anyone made a mirror w/o destroying what's in the disk already? The >> atacontrol man page is less than adequate in this respect...is is even >> possible? > > Oh, yes-- it's certainly possible to create a mirror with live data, > but one is advised to be cautious and have a full backup available in > case of problems. With hardware-based ATA controllers like Promise, > 3ware, etc, they should have a BIOS utility which you can use to > create the mirror-- make sure to add the drive with valid data first, > and then add the second or additional drives to the mirror set. > > The same approach ought to work with software-mirroring such as (g) > vinum. I'd add gmirror(8) to the list of software RAID solutions. Man page: http://www.freebsd.org/cgi/man.cgi?query=gmirror&apropos=0&sektion=0&manpath=FreeBSD+6.2-RELEASE&format=html Handbook: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/book.html#GEOM-MIRROR Cheers, David -- David Robillard UNIX systems administrator & Oracle DBA CISSP, RHCE & Sun Certified Security Administrator Montreal: +1 514 966 0122
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