Date: Tue, 13 Mar 2007 12:21:17 -0700 From: Chuck Swiger <cswiger@mac.com> To: Steve Franks <stevefranks@ieee.org> Cc: User Questions <freebsd-questions@freebsd.org> Subject: Re: mirror without destroying existing contents Message-ID: <C006858A-710F-49F0-8EB8-068C29CC2BF7@mac.com> In-Reply-To: <539c60b90703131212m731986b1p8603a86eca00d6b2@mail.gmail.com> References: <539c60b90703131212m731986b1p8603a86eca00d6b2@mail.gmail.com>
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On Mar 13, 2007, at 12:12 PM, Steve Franks wrote: > 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. -- -Chuck
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