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Old 02-10-2014, 11:04 AM   #1
pinky62
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Question want to use pre-rstore.db

Hi guys I used restore database accidentally and lost 1000 books. The pre-restore database file is larger and i am 100% sure it has my entire dat. Theonly question is how do i use this metadata_pre_restore.db . Do I do a library maintenance restore again or do something else. I am desperate.Govind please help!!!!!!!!!!!!!!!

Thanks Govind for the reply. Can you pls explain 1) do you want me to rename metadat.pre-retsore.db as metadata.db. Andthen should i open calibre and restore from the library maintenance dailogue. This is what i understood from previous msg. Can yoy pls confirm. I am a relative novice at this and dont want to mess the only chance of fixing mylost library. Thanks

Last edited by theducks; 02-10-2014 at 05:23 PM. Reason: 2 threads
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Old 02-10-2014, 11:21 AM   #2
kovidgoyal
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Simply replace metadata.db with metadata_pre_restore.db
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Old 02-10-2014, 01:16 PM   #3
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Simply renaming (deleting the old one) the file should do it.

This assumes the books are still there and what you did did not mess up the Author or title
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Old 02-11-2014, 07:58 AM   #4
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pre_restore.db

thanks worked like a charm.
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Old 02-11-2014, 10:30 AM   #5
theducks
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thanks worked like a charm.
Great
You got lucky. (When I mess up, only a restore from a full backup works. Faster the computer: Bigger the mistakes )
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Old 02-16-2014, 02:21 PM   #6
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I'd like to add my question here because I think it is a similar problem.

My metadata.db got corrupted and the programme did no open but just tried to and then simply crashed.
I copied a backup db into the Library folder instead of the corrupted one and Calibre opens.

My problem is now that I have a db that does not contain the added books after the last backup. The books however are in the Library folder.
Since the db ist big and there have always been problems with running maintenance I am not sure if I can run it wihtout crashing.

Anyway, I have no idea what would be the best solution anyway.
Simply adding the books again? I took copies and put them into a different directory so I can handle this like new additions from directory.

But will this overwrite the folders and files in the library, will it create duplicates or will Calibre just "update" metadata respectively add entries to the db?

P.S. As I thought - maintenance is not possible, Calibre crashes.

Last edited by manawydan; 02-16-2014 at 02:56 PM.
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Old 02-16-2014, 11:52 PM   #7
eschwartz
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If calibre is crashing when you try to perform maintenance, then something is wrong, it shouldn't do that. It sounds like something is wrong with the new database as well. Can you describe the steps you took to get this problem?

Adding the books again will create a new entry, but if the books don't have an entry at the moment, you will end up with one entry, I'd think. It won't however, overwrite the files in the library. calibre uses an id number included in the filename that will never be reused to make sure each book record is unique.
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Old 02-18-2014, 04:45 AM   #8
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Can you describe the steps you took to get this problem?
Wish I could.
Apart from that there are many books/entries and there has been quite a lot of handling (editing, deleting etc.) I do not know what could have caused it.

Apart from Windows or hardware messing it up that is.
And although there indeed is a problem on my system which I couldn't track (yet) I don't think that is likely.

However I don't think there is another option but to either start from scratch or use the current db.
Or is there a way to check the db apart from library maintenance?
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Old 02-18-2014, 05:05 AM   #9
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@manawydan - have you tried doing a database restore, it will build a fresh database from the .opf files in the book folders, that's why they're there.

Might as well start from the books that are actually in the library, at least then you should have a stable base on which to add missing books etc

BR
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