Date: Fri, 27 Dec 2019 00:13:40 -0500 From: "Mikhail T." <mi+t@aldan.algebra.com> To: freebsd-fs <freebsd-fs@freebsd.org>, freebsd-geom@FreeBSD.org Subject: Recovering an old ccd Message-ID: <c0819cb3-6cf1-a54a-2086-8b1a8f905f4c@aldan.algebra.com>
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Hello!
I need to recover some data from a ccd array I used years ago (early
21st century).
I have the three disks hooked up and visible to a FreeBSD-11.x machine:
* /dev/da0 (36Gb)
* /dev/da1 (36Gb)
* /dev/da2 (72Gb)
o /dev/da2s1
I used dd(1) to dump them onto my current server and can turn the dumps
into devices using md(4).
But I cannot remember the ccd-configuration parameters I used back then
-- nor even, whether all three were part of the array, or just the first
two. The presence of the da2s1 suggests it, but trying to mount the
/dev/da2s1 fails with EINVAL...
file(1) identifies the first two of the images as "data", but the third
is more interesting:
DOS/MBR boot sector MS-MBR XP english at offset 0x12c "Invalid
partition table" at offset 0x144 "Error loading operating system" at
offset 0x163 "Missing operating system", disk signature 0x2f392f38;
partition 1 : ID=0x7, active, start-CHS (0x0,1,1), end-CHS
(0x3ff,254,63), startsector 63, 143363997 sectors
Using the sysutils/scan_ffs on the images, I get the old labels listed:
the "last mounted as" strings make perfect sense, but the offsets/sizes
do not. For example:
da2: X: 134217728 1088 4.2BSD 2048 16384 0 # /tmp/meow
da1: X: 25165824 7341120 4.2BSD 2048 16384 0 # /var
da0: X: 125381904 8389759 4.2BSD 2048 16384 0 # /mnt
Any hints/suggestions? Thank you! Yours,
-mi
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