Raid 1; Table 3-3. Raid 1 Overview - Dell PowerEdge Expandable RAID Controller 3 User Manual

RAID 1

In RAID 1, the RAID controller duplicates all data from one drive to a
second drive. RAID 1 provides complete data redundancy, but at the cost of
doubling the required data storage capacity, as shown in Figure 3-2. Table 3-
3 provides an overview of RAID 1.
Ta b l e 3 - 3 . R A I D 1 O v e r v i e w
Uses Use RAID 1 for small databases or any other
environment that requires fault tolerance but small
capacity.
Strong Points RAID 1 provides complete data redundancy. RAID 1 is
ideal for any application that requires fault tolerance
and minimal capacity.
Weak Points RAID 1 requires twice as many disk drives.
Performance is impaired during drive rebuilds.
Drives
2
45
RAI D L e v el s