Hello FreeBSD gurus,
I recently had the pleasure of trying to recover a failed RAID1 array. It
consisted of two 120GB disks in mirrored configuration. Both drives have a
ton of bad sectors, so bad that the 3ware RAID card stopped recognizing that
there was a mirror at all. Having no other options that I could think of, I
excellent hardware - designed to PROTECT ;)
pulled the drive with the one with the least read errors, directly connected
it to ATA bus and used GNU ddrescue to make a disk image with only about 7
read errors.
Neither fdisk nor bsdlabel can read the disk image. I wonder if there's
some funny data at the beginning of the hard drive the 3ware card used for
RAID configuration? If this is true, is there a way to search for the
beginning of the real fdisk data and lop it off to make a possibly valid
disk image?
do
dd if=image bs=128k count=1|hexdump -C|less
and look for it :)
at MBR sector you'll see probably something at the end like this:
00000190 46 0a d0 e3 00 5e 05 28 46 02 77 88 c3 52 65 61
|F.##.^.(F.w.#Rea|
000001a0 64 00 42 6f 6f 74 00 20 65 72 72 6f 72 0d 0a 00 |d.Boot.
error...|
for bsdlabel it's easier it's "WEV" and first 3 bytes.
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