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26 Setting Up and Using Your Computer
RAID Level 0 Configuration
NOTICE: Because a RAID level 0 configuration provides no data redundancy, a failure of one drive results in the
loss of all data. To protect your data when using a RAID level 0 configuration, perform regular backups.
RAID level 0 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
drive(s) 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.
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.
hard drive 1
segment 1
segment 3
segment 5
hard drive 2
segment 2
segment 4
segment 6
serial ATA RAID
configured for
RAID level 0
book.book Page 26 Friday, October 27, 2006 4:02 PM