08-09-2014, 06:47 PM | #16 | ||
null operator (he/him)
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BR |
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08-09-2014, 08:10 PM | #17 |
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You are best to have at least two backups because if you backup from an unknown corruption, you then screw up one backup. The other backup would then be needed to restore from.
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08-10-2014, 11:39 AM | #18 | |
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Obviously, this isn't practical in the real world, because it requires more hard drive space than the average user is likely to have. The closest reasonable solution is rotating backups. For example, depending upon the situation, you might have a different backup for each day of the week, or a different backup for each day of the month. A variation of this would be to have a different backup for each day of the month, but the backup on the first day of the month gets rotated into a set of monthly backups for each month of the year. A scheme like this would still probably take up too much space just to make sure your Calibre database is backed up properly. My point is that you have to find a system that works for you. You have to weigh the importance of the data against the hard drive space the backups would require. |
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08-10-2014, 01:05 PM | #19 | |
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08-10-2014, 01:08 PM | #20 |
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Regular backup snapshots do not need to take up more than 1X + new content space. A good backup system would hardlink backup files that haven't changed. Mike Rubel wrote up the initial guide: http://www.mikerubel.org/computers/rsync_snapshots/
and others have expanded/explained/modified it, example here: http://webgnuru.com/linux/rsync_incremental.php This is also what Apple's Time Machine does. Last edited by eschwartz; 08-10-2014 at 01:13 PM. |
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08-10-2014, 01:12 PM | #21 | |
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I have been keeping the EHD connected constantly since recovering back to factory new status. Are you suggesting that I don't leave it connected while I am using Calibre? I went to the link, and I see it suggests not running on more than one networked library. My laptop is connected to my home network, but Calibre is only on my laptop, and is not accessed by either of the other two computers on the network. Last edited by jeremysnana; 08-10-2014 at 01:20 PM. |
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08-10-2014, 07:07 PM | #22 | |
null operator (he/him)
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The NTI Backup Now web site refers to a Continuous Back feature (see first attachment), elsewhere its refers to a Sync/Continuous Backup Method (see second attachment) Here's a recent thread where a calibre user lost some books ==>> Disappearing Books. I'm reasonably confident the disappearing books was caused by running Apple's Time Machine/Capsule and calibre concurrently, the OP (madeleinelevy) saw fit to take my advice and to not run Time Machine concurrently with calibre. As I see it the NTI Backup Now Continuous Backup feature has similar features to the Apple Time Machine product. So I'm suggesting you might want to consider disabling Backup Now when you're running calibre. BR |
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08-10-2014, 09:30 PM | #23 |
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I am a firm believer that the time I spend on my calibre library is worth a bit of space for backups.
Cleaning up tags, ensuring the metadata shows what I want and the other information about the books is important enough to me that I keep a full backup of the library. I normally do a rar of the entire library directory (with calibre closed of course) and name it by library name and date. While many seem to think this is wasteful in terms of disk space, and that incremental backups work well, I am afraid I am of the school of thought that simple, full backups are easier to restore. Multiple backups, dated, will allow me to go back a few weeks or months to a point before an error occurred if necessary. If your library is larger than a dvd (greater than 4 gig) then it may be necessary to save it to another drive or a usb drive or even a large sd card. You can also save a copy of your library to the cloud. I guess the main reason my backups are all in rar format is that I want to be sure I don't switch to my backup and start updating it and then switch back to the original. |
08-11-2014, 02:59 PM | #24 |
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External hard drives are very inexpensive nowadays. It would be a good idea to have 2 or more, and rotate them once in a while. i.e. bring one out of storage, erase it and copy the current one over to it, then store the current one. I have a fire safe I store my drives in to keep them safe while in storage. Since the EHD are mainly backups of what is already on my laptop this works out as a reasonably inexpensive and non-time consuming method for keeping my stuff safe.
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