A 3ware raid5 array I had died.
It looks like the data is intact, and there are two good recovery methods:
1) a toolchain from 3ware that, if it doesn't work, will destroy the data.
This method is free, and I can do it myself.
2) professional forensic services. Costs a lot.
I'm going to start with #1, but before I do I want to image the individual
drive members so that I can go to method #2 if necessary.
I am planning on attaching each individual member of the raid5 array to a test
FreeBSD system, and run:
dd if=/dev/ad1 of=/data/disk/image.file
Two questions:
- is that a complete 'dd' command, or do I need to specify "bs=xxx" and
"count=xxx" ?
- is there any chance that simply booting with this drive attached to the
system, and running a 'dd' like this, will somehow alter the contents or
"touch" the array member in any way ? What I have described above appears to
be a completely read-only process, but I'd like to make sure there aren't ANY
bits that FreeBSD will write to this disk ...
Thak you.
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