Re: Can't recover svn repo

On Monday 26 October 2009, Alec Leamas wrote:
> I need help to, if possible, recover some svn repos. The problem can be
> stated in two lines:
>
> cd /usr/local/svn
> svn # svnadmin verify yalt2
> svnadmin: Can't open file 'yalt2/format': No such file or directory
>
> I get this message for all kinds of svnadmin operations, including
> restore. The reason is obvious: the file 'format' is indeed missing. I
> can see it in other repos, but not in this one.

At this point, the typical suggestion is "just get your last backup". I'll
repeat here that SVN is not a replacement for a backup and recovery strategy.

> This repo is one which I havn't touched for some years. During this
> period, I have upgraded my Fedora 11/x86_64 system several times and I
> guess this is the reason (?). It seems that other repos which I have
> accessed over time has been updated somehow; these works fine.
>
> I have tried to access and recover the repo with some older versions of
> Fedora (9, 7) without success; same error message.
>
> But now I'm stuck. I don't really know what I have in my repo: what
> version, which kind of db (Berkeley?). I don't even know if it's
> corrupted or just in an old format. Basically, I just don't know what to
> do.

If this really is in an old format, it is very old, probably predating the 1.0
release of Subversion.

Suggestion:
1. Make a backup, so you can safely toy with the repo.
2. The 'format' file just contains an integer less than (I think) 6. You could
try those in order and see if it gets you any further.

> ./db/revprops:
> 84 85 86 87 88 89 90 91 92 93 94
>
> ./db/revs:
> 84 85 86 87 88 89 90 91 92 93 94

Looks a bit like an FSFS repository, but it is missing the revisions 0 to
83...

Good luck!

Uli

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