Quote:
Originally Posted by Bookerblood
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My PC is on its last legs and I'm trying to transfer the library to a new PC. ...
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EXACTLY how?
In times past, I've encountered issues when copying things like the calibre library across a network. The issue is not with calibre, but with the network, primarily the drivers for the network interfaces/cards in one or both of the machines. Copying a massive number of small files creates additional network traffic and that can expose flaws in the drivers' use of buffers and caches. Files would get lost, transfer would get interupted, and/or files would get corrupted.
My old "fix" for this was to create a single ZIP file containing the complete folder tree of the collection of small files (e.g. calibre library, large collection of small JPEGs, ...) and then transfer that ZIP over the network, unZIPing it on the target machine after the transfer completes. I still do this for some things since the ZIPping and unZIPping on modern machines is efficient and the network transfer of one thousand 1mb files takes substantially longer than transferring a single 1gb file.