Date: Tue, 1 Oct 1996 09:35:15 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> To: grog@lemis.de (Greg Lehey) Cc: questions@FreeBSD.org Subject: Re: disk-to-disk copy Message-ID: <199610011635.JAA19646@GndRsh.aac.dev.com> In-Reply-To: <199610011408.QAA21860@allegro.lemis.de> from Greg Lehey at "Oct 1, 96 04:08:13 pm"
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> Rodney W. Grimes writes: > > > >> I have 2 SCSI disks which are going bad, and I've already > >> gotten (identical) replacement drives. I'd like to copy > >> everything (data, partition tables, etc) from the old drives > >> to the new ones. Is there an easy way to do this? > >> > >> Nothing jumped out at me from the man pages. I'd rather > >> not have to go through disklabel, dump, restore, etc. > > > > If they are truely identical in block count this will do it: > > dd if=/dev/rsdX of=/dev/rsdY bs=8192 > > > > Note that hard errors are going to cause this to abort, so turn > > on ARRE to try and minimize them with: > > scsi -f /dev/rsdX -m 1 -P3 -e > > I've been waiting to see if anybody said aye or nay about this one. > Last time I tried it, about a year ago both on 2.1-prerelease and > 2.2-current, it didn't work: there are various interlocks which > prevent you from overwriting volume labels. I don't have the time to > check if it's still the case, but I'd be very interested in feedback. Note that I very carefully specified ``rsdX'' with no trailing slice or partition name, this device does not have any of the said interlocks and it is how I turn out production installed disk drives for clients machines. This overwrites any and ALL data on the destination drive, including the MBR. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD
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