Acer Veriton M661 Intel Matrix Storage and RAID - Page 6

Intel Matrix Storage Manager Quick Guide for Acer Selected Veriton PC V1.1 RAID1 (mirroring) • RAID1 creates an exact copy (or mirror) of a set of data on two or more disks when reliability is more important than data capacity. • A classic RAID1 mirrored pair contains two disks, which increases reliability exponentially over a single disk. o Mirroring allows continued operation of the system in the event of one drive or array failing. o Restoration can be performed using the mirrored copy. o I/O performance may suffer during reconstruction due to the increased activity between locations. • RAID1 volume capacity = capacity of smallest HDD • Such an array can only be as large as the smallest member disk. D is k 1 B lo c k 1 B lo c k 2 B lo c k 3 B lo c k 4 D is k 2 B lo c k 1 B lo c k 2 B lo c k 3 B lo c k 4 P h y s ic a l d is k s R A ID 1 B lo c k 1 B lo c k 2 B lo c k 3 B lo c k 4 L o g ic a l d is k P h y s ic a l d is k s 120 GB P h y s ic a l d is k s 120 GB L o g ic a l d is k s 120 GB RAID5 (striping with parity) • RAID5 uses block-level striping with parity data distributed across all member disks. • A RAID5 array can withstand a single disk failure without losing data or access to data. • RAID5 is a good all-round system that combines efficient storage with excellent security and decent performance. It is ideal for file and application servers. • RAID5 volume capacity = [(number of HDDs) - 1] x (capacity of smallest HDD) 6/21