Dell XPS 630 Owner's Manual - Page 68

RAID Level 1 Configuration

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Another advantage of a RAID level 0 configuration is that it utilizes the full storage capacities of the drives. For example, two 120-GB hard drives combine to provide 240 GB of hard drive space on which to store data. NOTE: In a RAID level 0 configuration, the size of the configuration is equal to the size of the smallest drive multiplied by the number of drives in the configuration. RAID Level 1 Configuration RAID level 1 uses a data-redundancy storage technique known as mirroring to enhance data integrity. When data is written to the primary drive, the data is also duplicated, or mirrored, on the second drive in the configuration. A RAID level 1 configuration sacrifices high data-access rates for its data redundancy advantages. If a drive failure occurs, subsequent read and write operations are directed to the surviving drive. A replacement drive can then be rebuilt using the data from the surviving drive. NOTE: In a RAID level 1 configuration, the size of the configuration is equal to the size of the smallest drive in the configuration. 68 About RAID Configurations

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68
About RAID Configurations
Another advantage of a RAID level 0 configuration is that it utilizes the full
storage capacities of the drives. For example, two 120-GB hard drives
combine to provide 240 GB of hard drive space on which to store data.
NOTE:
In a RAID level 0 configuration, the size of the configuration is equal to the
size of the smallest drive multiplied by the number of drives in the configuration.
RAID Level 1 Configuration
RAID level 1 uses a data-redundancy storage technique known as mirroring to
enhance data integrity. When data is written to the primary drive, the data is
also duplicated, or mirrored, on the second drive in the configuration. A
RAID level 1 configuration sacrifices high data-access rates for its data
redundancy advantages.
If a drive failure occurs, subsequent read and write operations are directed to
the surviving drive. A replacement drive can then be rebuilt using the data
from the surviving drive.
NOTE:
In a RAID level 1 configuration, the size of the configuration is equal to the
size of the smallest drive in the configuration.