What is disk space redundancy?
Hello, I can't understand what disk space redundancy is. I searched in Yandex, but found a couple of phrases. And so, I did not see a good explanation. Help us with a link or explain what this thing is. Thanks.
1 answers
The fault tolerance of the array is achieved due to the redundancy of information stored on hard disks, that is, part of the disk space capacity is allocated for service purposes, becoming inaccessible to the user. Redundant information can either be placed on a dedicated disk, or distributed among all the disks in the array. There are quite a lot of ways to generate redundant information. The simplest of them-full duplication (or mirroring) - has a 100% accuracy rate. redundancy. To reduce redundancy (increase the amount of usable disk space), various mathematical methods are used, such as calculating parity or applying error-correcting codes.
Is this it?