Gateway FX530S 8512279 - Gateway Computer Reference Guide (for Gateway FX-Seri - Page 45
RAID 1 for security, RAID 5 and 10 for both: performance and, security
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www.gateway.com RAID 1 for security RAID 1 maintains a complete copy of all files on each physical hard drive in the array. Maintaining simultaneous, complete copies of files across multiple hard drives is called mirroring. If a drive fails, the mirrored drive takes over and acts as the primary drive. In the following graphic, each letter represents a unique block of data, and each column represents a separate hard drive. RAID 1 A A B B C C File reading performance (seek time) is increased using the same methods that RAID 0 uses, although writing speed is the same as if writing to a single hard drive. Drawback RAID 1 treats the entire array as a single drive with the storage capacity of the smallest physical drive in the array. So if you have two drives (300 GB and 250 GB) in a RAID 1 array, your computer only recognizes a single drive with 250 GB total capacity. RAID 5 and 10 for both: performance and security Understanding RAID 5 RAID 5 uses striping (at the file level) with on-the-fly error correction across all drives. Because of this error correction, small file read/write errors can be quickly and automatically fixed without a significant drop in system performance. RAID 5 offers good performance and data redundancy. This array preserves your files if a drive fails. RAID 5 stripes both data and parity information (error-checking information) across multiple drives. Striping across drives improves overall performance, and the parity information provides data protection. Because of the error-correction capabilities, if a drive fails, the data can be quickly and automatically fixed. 39