REDP-3919-00
A new Redpaper, "A Look at System i Integrated DASD Configuration and Performance under i5/OS" (REDP-3919-00), discusses integrated DASD configuration, DASD protection capabilities, and DASD performance of the disk-controller hardware announced through 2007 and supported by i5/OS V5R3 and V5R4. The paper covers specifications of the latest disk-controller hardware; RAID-5, RAID-6, and mirrored-protection considerations; general guidelines for DASD hardware choices based on estimated disk I/O operation rates with the different protection methods; and DASD performance statistics gathered by i5/OS.