![]() What I hadn’t done was looked at what I needed to back up, how often, and to what. It was then that it dawned on me that I’d got the whole thing wrong in the first place. I dropped back to an interim solution of Carbon Copy Cloner while I worked out what to do next. In the end, I was forced to admit that, if I stuck with Time Machine, I’d probably never get another backup to complete. It never returned, having run for several hours at a transfer rate of less than 1 MB/s to drives which were capable of over 1 GB/s, twice the speed of my old Pegasus. Once I’d got a 6 TB HFS+ backup volume (at that stage I only had three SSDs installed), I set Time Machine loose to make its first full backup, of a little more than 1.2 TB. ![]() Not only had that to be disabled in order to install those extensions, but it had to be left off in order to run SoftRAID at all. The first was installing SoftRAID, which relies on multiple kernel extensions, which could only be loaded in Catalina by turning off Secure Boot. I had several hurdles to cross before I could even turn Time Machine on again. My original plan had been to use SoftRAID to turn those four SSDs into a single 8 TB HFS+ volume, and carry on running Time Machine just as I have for years. These articles explain what I now do, how and why. As you’ll have read here, although I still use Time Machine for backups, I’ve had to change my backup policy completely. Some $/£/€ 1500 later, I am the proud owner of an OWC ThunderBay 4 Thunderbolt 3 RAID enclosure packed with four 2 TB Samsung 860 EVO SSDs. When it came to replace my trusty old Promise Pegasus RAID system, which must have done more than seven years service and worked its way through several sets of hard disks, everyone said go SSD, and I did. The prospect of abandoning expensive conventional backup software such as Retrospect – which coincidentally went off the market for a year just at that time – and running hourly small backups was alluring. In those days, I had an 8-core Mac Pro with four 500 GB hard drives spinning at 7200 rpm. A great deal has changed since Apple introduced Time Machine back in 2007.
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