[OpenAFS] Recovering filenames from namei fileserver's /vicepa
Mon, 27 Jun 2005 19:02:49 -0400
On Sunday, June 26, 2005 08:53:56 PM -0400 Derrick J Brashear
> On Sun, 26 Jun 2005, Richard Godbee wrote:
>> outside computer company the department hired to fix/maintain the
>> servers had overwritten the first hard drive of the three disk software
>> RAID 5 set with another Linux installation. Just to make sure I
>> couldn't bring the RAID array up by marking the first drive as failed,
>> they also fdisk'd the remaining two drives. Oh, did I mention there
>> are no backups?
>> Here is where I stand now: I managed to recover november's RAID array,
>> and I have copied both machines' /vicepa trees to my PowerBook. At
>> this point, we're uninterested in reconstructing their AFS cell.
>> They're bringing in a
>> ** What is the fastest/least-painful way for me to take these two
>> /vicepa trees and get meaningful pathnames/filenames attached to the
>> files? **
> Set up a fileserver and read the files out:
>> - Can I bring up a fresh Linux box, install the OpenAFS server+client,
>> point that OpenAFS server at one of the /vicepa trees, and copy out the
>> files with their names intact?
> Note that you'll want to be very careful to preserve file ownership and
> modes, otherwise the salvager may "help" you by deleting your data.
File ownership, modes, and the exact filename, including case.
If you have copied the /vicepa trees to an HFS+ filesystem on your
powerbook, you may already have lost the correct filename case,
particularly if there happened to be two files whose name differed only in
case (note we are talking about the names of the fileserver's data files,
not the users' filenames).
Also note that because of this issue, the encodings used on MacOS X
fileservers are not the same as those used on other platforms. So, you
cannot feed a /vicepa tree from a Linux box to a fileserver running on a
MacOS box, and expect it to work.
-- Jeffrey T. Hutzelman (N3NHS) <email@example.com>
Sr. Research Systems Programmer
School of Computer Science - Research Computing Facility
Carnegie Mellon University - Pittsburgh, PA