HP Xw6400 Workstation RAID Support - Page 9

RAID 5 Arrays (Parity) Data from each drive is duplicated (in segments) on the other drives in the array Strip 1A Parity (2B 2C) Strip 3A Strip Strip 2B Parity (3A 3C) Parity (1A Strip 2C Strip 3C Drive A Drive B Physical Drives Drive C • RAID 5 = parity • Failed drive is rebuilt from parity data • Very high read performance • High system overhead for writes • Requires minimum of three drives • Summary o Better performance than a single drive o Inexpensive redundancy © 2006 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. 439277-001, October 2006 9