Date: Thu, 26 Feb 2004 22:13:52 -0800 From: "Benjamin P. Keating" <bkeating@teov.org> To: Charles Swiger <cswiger@mac.com> Cc: freebsd-questions@freebsd.org Subject: Re: Recovering Data from a reformatted drive Message-ID: <403EE020.1020105@teov.org> In-Reply-To: <C8D4405E-68A4-11D8-870A-003065ABFD92@mac.com> References: <403ED531.5040508@teov.org> <C8D4405E-68A4-11D8-870A-003065ABFD92@mac.com>
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Charles Swiger wrote: > On Feb 27, 2004, at 12:27 AM, Benjamin P. Keating wrote: > >> I have a hard drive that had lots of important data on it. It was >> reformatted and I have no backups (lesson learned). It was a ccd >> mirror of two 100gig drives. Once the reformat of this ccd completed >> the machine was shut down to prevent writing to this disk even more so. > > > By this you mean, you used ccd to reformat the drive as part of a > newly created RAID-1 mirror? > > If you just newfs'ed the disk, most of the data blocks will still be > intact and can be recovered (to some extent). However, if you did > create a RAID filesystem on the disk, you are out of luck. The > process of creating a RAID-1 or -5 volume involves syncronizing all of > the disks, which will overwrite every sector on the drive. > > I'm sorry that you lost data. > Im not sure if this counts as a RAID configuration. Here is what I did; I had a working FreeBSD 4.9 system, powered it down and plugged in the two additional IDE 100gig harddrives (what make up the ccd0c device). Powered up and did this: cd /dev/ sudo ./MAKEDEV ccd0 sudo ccdconfig ccd0 128 4 /dev/ad0e /dev/ad1e sudo ccdconfig -g sudo vi /etc/ccd.conf (added "ccd0 128 4 /dev/ad0e /dev/ad1e" to the ccd.conf file) sudo newfs /dev/ccd0c I let the newfs command finish (it scrolled a page full of block numbers it looked like). I realized this last command is NOT what i wanted about .5 seconds after hitting enter. :( Would this be a RAID configuration? I don't think it is, it's a simple mirror -- This message has been scanned for viruses and dangerous content, and is believed to be clean.
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