Date: Thu, 14 Mar 1996 22:55:40 -0500 (EST) From: bah6f@viper.cs.virginia.edu To: questions@freebsd.org Subject: plea for disklabel help Message-ID: <9603150355.AA00225@viper.cs.Virginia.EDU>
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I'm smarter than this, really. I was routinely upgrading to 2.2-SNAP, when I did something catastrophically stupid. This hasn't been my week. I was having trouble getting my machine to boot after I installed 2.2-SNAP. I use an "incompatible" partition table on my scsi boot disk, and I had written out a standard MBR during the SNAP install. It didn't want to boot. Let's not get into that. I'll worry about that later. Here's my mistake: I went into the sysinstall fdisk program and I re-wrote the partition table. I used the (W)rite option in fdisk. Ugh. I clobbered my existing disklabel when I did that. Up to that point my partition table and disklabel had been fine, it just wouldn't boot. Now I've blow away my original disk label. Of course, being the foolhardy guy that I am, I don't remember precisely the size of the partitions I had on the disk. It was something like: sd0s1a 32Mb / sd0s1b 32Mb swap sd0s1e 512Mb /home sd0s1f the rest /usr I don't care about / or /usr (or swap, naturally). All I need to do is grope around on the disk, find the beginning of /home, and create a disklabel entry for it. If I can get /home off that disk, I'll be fine and I can redo the rest from scratch. Nothing valuable lived anywhere but on /home. So, anyone have a way I can grope the disk and find the beginning of my /home partition? Once I find that, how do I construct the corresponding disklabel entry? Isn't there a "magic" number for superblocks? Any quick-n-dirty way to scan the raw blocks looking for that magic number? Would that do it? A six-pack of your favorite malted beverage to someone who can help me get /home back. :) Thanks in advance, Mud -- Paco Hope Technical Support Staff email: paco@cs.virginia.edu Department of Computer Science WWW: http://www.cs.virginia.edu/~bah6f/ University of Virginia
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