RAID (Redundant Array of Inexpensive Disks) is the combining of multiple disks to mimic a single physical storage device. Depending on the type, or “level”, RAID increases performance, capacity, or fault tolerance, or in some combination thereof. So, what is RAID 1?<\/p>\n
RAID 1, which requires at least two drives, is the simplest of the RAID modes that will remain in operation, retaining all data when a drive fails. It does this by mirroring, i.e. writing the same data to two or more disks simultaneously. There is no increase in speed or capacity, but it’s easy to implement and offers the protection from data loss and downtime that RAID 0<\/a> lacks.<\/p>\n As RAID levels can be difficult to remember, the mental hook for RAID 1 is that it provides at least one<\/em> copy of your data for safekeeping.<\/p>\n Here are the major advantages:<\/p>\n It can also be used to provide redundancy for RAID 0 sub-arrays (RAID 1+0 aka RAID 10<\/a>).<\/p>\nThe Upside<\/h2>\n
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