01-26-2013, 05:50 AM | #16 | |||
null operator (he/him)
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NTFS has changed over the last 10 years, I won't bore you with the details. MS does what it can to maintain backward compatibility, so most folks are unaware of the changes. Its good practice to low level format any new drives on the machine you intend using them. Quote:
But first it would be really good if you could back up your Calibre library as it is now - just in case. Do you have another drive with enough free space for a backup - preferably not your system drive [C:]? Do you do any backups, if so what software/procedures do you use? From your previous posts appears that you have other data (~300GB), apart from your your Calibre Library on your E drive, - can you confirm that's true? Have you had any problems reading and writing that data, and what would you do if you lost it ? Experts : I want to suggest Joan does the following, but I'd like others to comment first Remove the Library from Calibre Added Copy metadata.db to a safe place Delete metadata.db from the Library folder Create a new Library at the same location Restore the Library What will happen if Calibre hits a corrupt opf? I tested it here on a Library of 11,382 books and it was fine, but it was a good library so all I really did was test the process. BR Last edited by BetterRed; 01-26-2013 at 07:00 AM. Reason: clarity + Added backup step |
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01-26-2013, 06:03 AM | #17 | |
Wizard
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01-26-2013, 06:55 AM | #18 | |
null operator (he/him)
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I did consider that option, but I was put off by the numbers It looks like the Copy Library would read/write/delete ~14,000 books Which means the Add Books would read/write ~47,000 books That will take a lot longer than than an in-situ database rebuild, especially on a USB 2.0 drive. It's also 2 steps rather than one, and I couldn't see any offsetting advantages in a two-step approach. If an in-situ rebuild doesn't work we can then try the two-step approach, because we'll definitely have a backup of metadata.db. BR |
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01-26-2013, 06:59 AM | #19 |
Wizard
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I thought that the whole problem started when OP did a database rebuild and it did not have the desired results! That is why I suggested my approach as one way of working out what files are going to need further work to get them back into Calibre and properly referenced by the Calibre metadata.db file.
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01-26-2013, 07:18 AM | #20 |
null operator (he/him)
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I've had errors rebuilding an existing database, which didn't occur if I started with an empty database - its happened twice. On both occasions I got all my books back.
That's why I thought it was worth trying, especially on a 61,000 book library. But you know a lot more about Calibre than me, so I'm happy to defer. BR |
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01-26-2013, 08:25 AM | #21 | |
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01-26-2013, 09:08 AM | #22 |
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I keep thinking that at times like this, a good old fashioned directory lising would help a lot; something like a
Code:
dir /s /a driver_letter:\ > dir_listing.txt |
01-26-2013, 11:51 AM | #23 | |
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01-26-2013, 10:18 PM | #24 | |||||
Did someone say Python?
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1.) No problems that I'm aware of. 2.) I would feel bad. |
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01-26-2013, 10:29 PM | #25 |
Did someone say Python?
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And, really, it's okay to say it. You didn't mean "Experts". You meant "anyone who isn't a bloomin' idiot like Joan M."
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01-28-2013, 07:46 PM | #26 |
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A hand-me-down drive that may have seen many hours of use may be on its way out - completely out, or at least increasingly common bad sectors. I may have missed the advice to purchase a new drive for creating a fresh library. New 1 TB USB drives start at about $80. It would be a shame to put in the effort and then have the thing disappear again.
Do the cats and pythons interact in interesting ways? |
01-28-2013, 09:49 PM | #27 |
Did someone say Python?
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Proper feline husbandry and ophidian husbandry dictate that the twain should never meet.
Well, there was that one time - a perfect storm of keeper error: a room door left open, a cage door left unclosed.... I lectured the cat later that he should never have jumped inside that python cage. I suspect all he heard from me was, "Blah, blah, blah, blah." |
01-28-2013, 11:04 PM | #28 |
Did someone say Python?
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Okay, should I just choose one method?
I looked for a command called "Copy Library" without success. Is it called something else? As always, thank you. Edit: under the calibre icon on the main toolbar, I find "Switch/create library," then "Choose your calibre library." I should pick a new location and then choose one of these options: "Move current library to new location" or "Use the previously existing library at the new location." Is this what you're talking about? If so, which option should I choose? Last edited by Joan M; 01-29-2013 at 12:07 AM. |
01-29-2013, 12:25 AM | #29 |
null operator (he/him)
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@Joan M - sorry I went AWOL, blame the weather. Couple of weeks ago we were on fire alert at 120°F in the shade and now we have floods at 75°F :sigh:
IMO one I/O error does not justify rushing out to buy a replacement disk. If you want to get an indication of the health of your 'Books' disk, you need to get its performance statistics, but these give no guarantee that a GOOD drive won't fail tomorrow or a BAD drive won't work for another 5 years. Given your on XP and its a USB drive you'll need a 3rd Party tool to look at the drive performance statistics. One that should work on XP and USB drives is the one in How To See if your hard drive is dying I suggest you you download the PORTABLE version of the CrystalInfo utility thats 'recommended' in the How To... - if in doubt here is a direct link http://release.crystaldew.info/redir...rystalDiskInfo Make sure all your drives are powered up. Unzip into a folder and run DiskInfo.exe - it will show a row of icons at the top - Blue for Good, Yellow for Caution and Red for Bad. Let us know what results you get. Have you backed up the calibre library folder - ie E:\Ebooks\CalibreBooks ? I'm going to be dealing with 'after the flood' consequences for a while. So I think it would best if you followed the 2 step process suggested by Itimpi and DoctorOoh. Maybe one of them can jump in and give you some detailed guidance. BR Last edited by BetterRed; 01-29-2013 at 12:28 AM. Reason: clarity |
01-29-2013, 03:43 AM | #30 | |
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