Tech Tips

 

RAID 1

RAID 1 consists of an exact copy (or mirror) of the data across two disks. The resulting data storage capacity is equal to the capacity of the smallest disk.  This configuration is fault tolerant to the failure of one disk.

 

 

 

RAID 5

RAID 5 consists of block-level striping with distributed parity (i.e parity information is distributed among the drives) across 3 or more disks. The resulting data storage capacity is equal to the capacity of all the disks added together minus one disk. This configuration is fault tolerant to the failure of one disk. Upon failure of a single drive, subsequent reads can be calculated from the distributed parity such that no data is lost.

 

 

 

 

RAID 1+0 or RAID 10

RAID 10 consists 2 mirror sets with data striped across the sets. The resulting data storage capacity is equal to the capacity of 1/2 of all the disks added together. This configuration is fault tolerant to the failure of two disks, one in each set. This configuration provides the best throughput of the RAID configurations shown here.

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