Date: Wed, 10 Jan 1996 19:02:04 -0500 (EST) From: Peter Dufault <dufault@hda.com> To: graichen@omega.physik.fu-berlin.de (Thomas Graichen) Cc: gcrutchr@nightflight.com, hackers@FreeBSD.org, questions@FreeBSD.org Subject: Re: Disk replication Message-ID: <199601110002.TAA00916@hda.com> In-Reply-To: <199601101922.UAA00711@mordillo> from "Thomas Graichen" at Jan 10, 96 08:22:33 pm
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> > hasn't Gary Crutcher said ? ... > > > > Hi, > > > > I have a 2nd SCSI drive (2.1 GB) which is the same as my 1st. My 1st drive > > has FBSD 2.05 on it, and I boot from it. How can I replicate the 1st drive > > onto the 2nd drive so I can disable the 1st drive and boot from the 2nd > > drive? I want to upgrade to 2.1 and if something goes wrong I need to bring > > my server back up quickly. I can only have the system down for about an > > hour or so. > > > > I would like to get info on how to do this ASAP as I want to do the upgrade > > this weekend. Any help would be greatly appreciated. > > > i think "dd if=/dev/sd0 of=/dev/sd1" should do the job (you must > adjust the drive-numbers to yours) > Big block sizes and quiescient disks will help also. Make sure the disk you are duplicating isn't being changed under you; go single user or unmount the disk. -- Peter Dufault Real Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267
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