Dell YH242 owner manual RAID Level 0 Configuration, RAID Level 1 Configuration, Segment Hard drive

RAID Level 0 Configuration

NOTICE: Because RAID level 0 configurations provide no data redundancy, a failure of one drive results in the loss of all data (the data on the remaining drive is also inaccessible). Therefore, ensure that you perform regular backups when you use a RAID level 0 configuration.

A RAID level 0 configuration uses a storage technique known as data striping to provide a high data access rate. Data striping is a method of writing consecutive segments, or stripes, of data sequentially across the physical drives to create a large virtual drive. Data striping allows one of the drives to read data while the other drive is searching for and reading the next block.

serial ATA RAID configured for RAID level 0

segment 1

segment 3

segment 5

hard drive 1

segment 2

segment 4

segment 6

hard drive 2

Another advantage of a RAID level 0 configuration is that it utilizes the full storage capacities of the drives. For example, two 120-GB 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

A RAID level 1 configuration 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. RAID level 1 sacrifices high data-access rates for its data redundancy advantages.

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Optimizing Performance