Thursday, June 9, 2011

What is RAID, What are the types of RAID?


Redundant Array of Inexpensive Disks (RAID)  is a type of protection available in Teradata. RAID  provides Data protection at the disk Drive level.  It ensures data is available even when the disk drive had failed.

Th\ere are around 6 levels of RAID ( RAID0 to RAID5) .  Teradata supports Two levels of RAID protection
RAID 1 - Mirrored copy of data in other disk
RAID 5 - Parity bit (XOR) based Data protection on each disk array.

One of the major overhead's of RAID is Space consumption

2 comments:

  1. Give Detail Info about RAID and discuss all the its type

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