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Configuring Units
32 3ware 9000 Series Serial ATA RAID Controller Installation Guide
Drive Capacity Considerations
The capacity of each drive is limited to the capacity of the smallest
drive in the array. The total array capacity is defined as follows:
2 RAID 0 or RAID 1
3RAID 0
RAID 1 with hot spare
RAID 5
4 RAID 5 + hot spare
RAID 10
Combination of RAID 0, RAID 1, single disks
5 RAID 5 + hot spare
RAID 10 + hot spare
Combination of RAID 0, RAID 1, hot spare, or single disks
6 or more RAID 50
Depending on the number of drives, a RAID 50 may
contain from 2 to 4 subunits. For example, with 12
drives, possible RAID 50 configurations include 2
subunits of 6, 3 subunits of 4, or 4 subunits of 3. With
10 drives, a RAID 50 will contain 2 subunits of 5
drives each.
Combination of RAID 0, 1, 5, 10, hot spare, or single disks
Table 3: Drive Capacity
RAID Level Capacity
RAID 0 (number of drives) X (capacity of the smallest drive)
RAID 1 capacity of the smallest drive
Table 2: Possible Configurations Based on Number of Drives
# Drives
Possible Configurations