TDB corruption on sam.ldb tdb files
aw-sambalists at silverstream.net.nz
Fri Sep 21 20:06:46 MDT 2012
Resending as I used a non list subscribed from address previously. Sorry for the duplicate message.
----- Original Message -----
> From: "Andrew Bartlett" <abartlet at samba.org>
> I doubt this will work. As soon as you have to read that failed
> record, it will fail. Aside from tdbbackup, we don't have any
> automatic tools to help here.
Ok I'll shelve that idea.
> Have you looked at the binary tdb to work out what the bad magic is?
Using this as a reference: tdb_rec_read bad magic 0x6863733d at offset=1773572
failed to copy DC=AD,DC=(domain name).ldb
Viewing and trying to make sense of the binary content of a file is pushing my level of understanding, but I'll have a go.
Using ghex2, and going to byte 1773572, I see the it has the value 0x74 which is the letter 't' in a reference to a machine account, CN=(computer name), CN=Computers,DC=(domain name). Byte 1773572 is the 't' in 'Computers'. So it's in the middle of a record. 124-127 bytes earlier is the string "@IDX" so I guess it's part of the index that I'm looking at.
Between @IDX and the above computer name is one more computer name, and after it are four more computer names, all intact, no unexpected characters. After that is a partial UUID, CN=c88227bc-fcca-4b58 (it stops there).
0x6863733d spells out "hcs=", but if I search that file for that phrase I don't get a result.
Am I looking for the right stuff here?
Andrew B, would it be worth me sending you the ldb file to have a look at?
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