Date: Wed, 1 May 2002 18:12:07 -0400 (EDT) From: john <johnnye@focker.2y.net> To: freebsd-fs@freebsd.org Subject: Need help recovering disklabel/slices, wiped out two blocks Message-ID: <200205012212.g41MC7l53041@focker.2y.net>
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First let me tell you how I got this problem. I was excited about getting my jaz drive hooked up so I could now do weekly backups. I was following the handbook's guide to setting up a tape drive and made a small typo. Instead of "dd if=/dev/zero of-/dev/da0 count=2", I did: # dd if=/dev/zero of=/dev/ad0 count=2 Nothing happened immediately, I realized my mistake and got my jaz drive working. I think I remember copying my home slice just to check out the write speed, so thats good. But then I rebooted and got the good ol' "NON SYSTEM DISK REINSERT AND PRESS ENTER" as if the master boot record was gone. First thing I did was used sysinstall from the floppies to check out fdisk, everything was gone! No partitions/slices to be found anywhere, so I exited, no changes. Next I tried the fixit disk to see what that told me, and in devices it only showed /mnt/dev/ad0 for disk drives. So thats where I left off, decided to get some more help before screwing anything else up. I checked out the manpages for disklabel, and it seems like thats what I need to re-create the slices, but I also found out that I need to know the exact geometry of my slices before. Is there a backup somewhere on the disk? I think someone in 1999 created a c program to get the geometries, but I cant find that. Someone else recommend hex editing, which I know nothing about. And lastly someone also mentioned super blocks having backups. The install was standard, I let freebsd take over my disk, but I did not take the default slices because I made a 10 gig slice for data, which is what I didnt backup yet :( Any help is greatly appreciated, /~John Eisenhower To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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