6/22/2023 0 Comments Online backup time machine![]() That isn’t the sort of thing you’d want to do when the RAID system is active, and will probably take much of the night before the RAID is online again and ready for use. The system then automatically rebuilds the Level 1 RAID so that it replaces the drive that you’ve just removed from that RAID. This centres on a RAID system configured in ‘mirror’ formation, RAID Level 1 and its variants, in which the drives can be hotswapped, which results in the RAID system automatically rebuilding itself.Īt the end of each day, the sysadmin pops one of the drives and inserts a freshly-formatted drive in its place. For many years before it became available, smart system administrators used a cunning trick which gave excellent off-site backup. ![]() Off-site backup doesn’t require a cloud service either. It’s the benchmark against which you should judge all others. Their services scale from backing up individual MacBooks, through unlimited capacity single computer backup from $60 per year, to large scale B2 storage similar to Amazon S3. There’s one cloud service which I single out for its all-round excellence: Backblaze. I’m sure I’m going to be deluged by personal recommendations in your comments, which I welcome. I pay less than £/$/€ 1 per month for 50 GB of iCloud storage, which integrates well and is simple to use. Couple that with how much you can afford to pay for the storage and service, and you should very quickly have a shortlist of solutions. Once you know what you want stored in your off-site backup, you’ll be able to work out what space you need. In my case, that includes a lot of source code, and all the articles I write for magazines. Then there are important records like tax returns and the documents to support them, and anything else which you really don’t want to lose. If you don’t already share those in iCloud, consider doing so unless you already have good off-site backups of them. ![]() To a degree, iCloud sharing already covers some of the most important data which should be backed up off site: mail messages, address book, calendar, and keychain, in particular. For small and single-person businesses, families and individuals, off-site backup is every bit as important, just on different scale. It’s fine for a sizeable business with a high-capacity Internet connection to make a complete nightly backup of its servers and their storage, but when you’re paying for it from your own shallow pocket that cost is likely to be prohibitive. The most important decision is what needs to go to off-site backup. So all the most important documents also need to be backed up to somewhere physically quite separate, ideally several miles or more away. A major fire nearby could prevent my gaining access to my Mac and its backups for many days, for example. So what happens if there’s a fire, lightning strike, flood, or all my gear gets stolen? This needn’t even be a disaster at the system’s location. a single clone of the System volume after each update to macOS (months).a daily clone of my Data volume and its external supplement (days to months). ![]()
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