![]() ![]() In the walkthrough below, you’ll learn how to safely set up RAID 0 and RAID 1 disk sets in macOS Sierra. With a striped disk set in particular, try to connect the disks to different ports on your Mac, rather than through a USB hub, which can detrimentally affect the performance of speedy storage devices, notably SSDs. However, this means there are more potential points of failure in the resulting set. This kind of disk enables several small disks to work like they are one, which you can then use as part of a striped or mirrored array in which other disks match the capacity of the concatenated set. This simply concatenates the capacity of multiple disks – which can be different – into a single volume. The third kind of disk set is JBOD, meaning just a bunch of disks. The latter situation can be dealt with by adding one or more extra disks to the set, either as additional slices (live copies of all the data stored by the set) or as spares, which are ordinarily idle and only called into action when a slice fails, in order to rebuild the set so that you have your desired minimum number of copies.Ī mirrored disk set’s capacity is the same as the lowest capacity disk that’s part of it, so you’ll want them to match in order to make the most efficient use of all of them. The former situation can be addressed by creating one or more periodic backups of the mirrored set and storing that separately, in the hope of limiting propagation of any damage. The worst cases here are if data on every disk becomes corrupted or all of the disks fail at the same time. The advantage of this is that as long as one disk does not fail, you can rebuild the array by replacing those that have become faulty. ![]()
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December 2022
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