Date: Wed, 26 Aug 1998 14:03:54 -0400 (EDT) From: Mikhail Teterin <mi@video-collage.com> To: questions@FreeBSD.ORG, current@FreeBSD.ORG Subject: recovering disk Message-ID: <199808261803.OAA08562@xxx.video-collage.com>
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Ok, so woke up in the morning to find my machine hanging: FreeBSD 3.0-CURRENT #0: Wed Aug 19 23:41:32 EDT 1998 Upon cold reset (soft one did not work) one of the disks had an invalid partition table (No magic). The disk is 2Gb Barracuda and had one slice in use: sd1s1 with sd1s1b being a 64Mb swap and sd1s1e being my home directory. I also had "dumpon" set to save crash onto the sd1s1b and suspect that this is the reason for this disaster... fdisk let me make the partition table, but I do not think I made it right because my subsequent attempts to `disklabel' result in the following being logged: sd1s1: type 0xa5, start 0, end = 4194057, size 4194058 sd1s1: C/H/S start 0/0/0 (4294967295) != start 0: invalid sd1s1: C/H/S end 995/241/44 (10605407) != end 4194057: invalid sd1s2: type 0x0, start 3804688384, end = 3314409471, size 3804688384 sd1s2: C/H/S start 994/240/21 (10594692) != start 3804688384: invalid sd1s2: C/H/S end 994/240/18 (10594689) != end 3314409471: invalid sd1s3: type 0x0, start 0, end = 4294967295, size 0 sd1s3: C/H/S start 0/240/0 (10559) != start 0: invalid sd1s4: type 0xa5, start 1, end = 4193639, size 4193639 sd1s4: C/H/S end 457/10/44 (4866619) != end 4193639: invalid sd1: cannot find label (no disk label) sd1s1: cannot find label (no disk label) sd1: ILLEGAL REQUEST asc:21,0 Logical block address out of range field replaceable unit: 3 sks:cf,2 sd1s4: cannot find label (no disk label) I'm wondering, if I can write a program which will: 1) read /dev/rsd1 to 2) find the beginning of the file-system partition and 3) write it out (all the way to the end) as a separate file, which 4) vn-mechanism will let me access and get to my files ? Or may be a program can be written to wonder through the /dev/sd1, find the correct parameters (with some human assistance/guessing) for fdisk and disklabel? I'm quite sure my data is intact on the disk and it is only its beginning that's hosed. Thanks in advance for your ideas and suggestions. Yours, -mi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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