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 RAID 1 - Mirroring and duplexing

RAID 1

RAID 1 or "mirroring", has been used longer than any other form of RAID. This level of RAID provides redundancy by writing identical data to each member disk of the array, leaving a "mirrored" copy on each disk. Mirroring remains popular due to its simplicity and high level of data availability. Level 1 operates with two or more disks that may use parallel access for high data-transfer rates when reading but more commonly operate independently to provide high I/O transaction rates. RAID 1 provides very good data reliability and improves performance for read-intensive applications but at a relatively high cost.The storage capacity of the level 1 array is equal to the capacity of one of the mirrored hard disks in a Hardware RAID or one of the mirrored partitions in a Software RAID.

See other RAID arrays below:

 RAID 0 - Striped disk array
 RAID 1 - Mirroring and duplexing
 RAID 2 - Error-correcting coding
 RAID 3 - Bit-interleaved parity
 RAID 4 - Dedicated parity drive
 RAID 5 - Block interleaved distributed parity
 RAID 6 - Independent data disks with double parity
 RAID 7 - Adds caching to levels 3 or 4
 RAID 10 - High reliability combined with high data performance
 RAID 50 - High I/O rates and data transfer performance
 ZFS RAID - RAID type used by FreeNas and other units
 X-RAID - RAID type found in Netgear and other RAID units

For pricing information or questions about RAID 1 data recovery please call 1-888-307-3676.


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