Ideally, two copies.Ī RAID 5 array is similar to RAID 0, as data is striped across several disks. Just make sure there is a complete copy of the data somewhere else. Preferably to magnetic tape, but you could also use on-line remote backup or a second RAID array. Please note that whatever RAID configuration you choose, you still need to backup the data. These are known as " RAID levels", and we are going to explore what they are and their characteristics in the following sections. Now there are many ways to arrange and configure these inexpensive hard disks, depending on whether you want high performance (e.g., for video editing), high reliability, low cost or something in between. It allows the creation of a single logical disk (looks like one disk from the computer's point of view) made up of many cheap hard drives. RAID is an acronym that stands for Redundant Array of Inexpensive Disks, or, occasionally, Redundant Array of Independent Disks. What was the solution? Use many disks together, acting as one. Soon cheaper hard drives came along, but they were not very reliable at all, with failures being all too common. The thing is that when they failed (everything fails eventually), all of the data would be lost (unless you had a backup) and the expensive disk would need to be replaced. In the early days of computing, mainframes used large and expensive hard disks, designed to be highly reliable. If this is your first time configuring a RAID array, you might be unsure as to exactly what one is.
0 Comments
Leave a Reply. |