Dell YT583 manual RAID Level

NOTE: RAID levels do not represent a hierarchy. A RAID level 5 configuration is not inherently better or worse than a RAID level 0 configuration.

The RAID controller on your computer can only create a RAID level 0 configuration using two to four physical drives. A RAID level 5 or 10 array (only available with the optional PCI Express RAID controller) must be made up of three or four drives.

All drives must be the same type of drive; SAS and SATA drives cannot be mixed in a RAID array. The drives should also be the same size to ensure that the larger drive does not contain unallocated (and therefore unusable) space.

NOTE: RAID levels do not represent a hierarchy. A RAID level 10 configuration is not inherently better or worse than a RAID level 0 configuration.

RAID Level 0

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 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.

SATA 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 capacities of the drives. If you have two 120-GB drives installed, you have 240 GB on which to store data.

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