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Diagram of a RAID 1 setup. RAID 1 consists of an exact copy (or mirror) of a set of data on two or more disks; a classic RAID 1 mirrored pair contains two disks.This configuration offers no parity, striping, or spanning of disk space across multiple disks, since the data is mirrored on all disks belonging to the array, and the array can only be as big as the smallest member disk.
RAID 01, also called RAID 0+1, is a RAID level using a mirror of stripes, achieving both replication and sharing of data between disks. [3] The usable capacity of a RAID 01 array is the same as in a RAID 1 array made of the same drives, in which one half of the drives is used to mirror the other half.
The distinguishing feature of Matrix RAID is that it allows any assortment of RAID 0, 1, 5, or 10 volumes in the array, to which a controllable (and identical) portion of each disk is allocated. [7] [8] [9] As such, a Matrix RAID array can improve both performance and data integrity.
RAID 6 requires a minimum of four disks. As with RAID 5, a single drive failure results in reduced performance of the entire array until the failed drive has been replaced. [11] With a RAID 6 array, using drives from multiple sources and manufacturers, it is possible to mitigate most of the problems associated with RAID 5.
a mixture of disk drives configured as RAID 1 (2D+2D and 4D+4D) and RAID 5 (3D+1P and 7D+1P). up to 1024 disk drives for 288 GB to 149 TB raw and 144 TB to 129 TB of usable storage capacity in a single array; heterogeneous connectivity via Fibre Channel, iSCSI, FICON and ESCON; up to 128 GiB battery-protected (48 hours minimum), mirrored write ...
A disk array controller is a device that manages the physical disk drives and presents them to the computer as logical units. It often implements hardware RAID , thus it is sometimes referred to as RAID controller .
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CLARiiON was an early commercial example of a RAID product and initially sold exclusively as an array with the company's Aviion line of computer systems as the HADA (High Availability Disk Array) and later the HADA II [6] before being made available for broader open systems attachment and renamed CLARiiON in 1994. [7]