Intel AXXRMS2AF080 Hardware User Guide - Page 14

- No reboot necessary after expansion - Load Balancing • Upgradeable Flash ROM interface. • Allows for staggered spin-up, hot-plug, and lower power consumption. • User specified rebuild rate (percent of system resources to use from 0-100%). Caution: Exceeding 50% rate may cause operating system errors due to waiting for controller access. • Background operating mode can be set for Rebuilds, Consistency Checks, Initialization (auto restarting Consistency Check on redundant volumes), Migration, OCE, and Patrol Read. Redundancy and Error Handling • SGPIO, In-band and out-band SES2 Enclosure management support. • Drive coercion (auto-resizing to match existing disks). • Auto-detection of failed drives with transparent rebuild. There must be disk activity (I/O to the drive) for a missing drive to be marked as failed. • Auto-resume on reboot of initialization or rebuild (must be enabled before virtual disk creation). • Smart initialization automatically checks consistency of virtual disks if there are five or more disks in a RAID 5 array, which optimizes performance by enabling readmodify-write mode. RAID 5 arrays of only three or four drives use Peer Read mode. • Smart Technology predicts failures of drives and electronic components. • Patrol Read checks drives and maps bad sectors. • Commands are retried at least four times. • Firmware provides best effort to recognize an error and recover if possible. • Failures are logged from controller and drive firmware, and SMART monitor. • Failures are logged in NVRAM, viewable from OS Event Log, Intel® RAID Web Console 2; CIM, LEDs. • Access policy: - RW: allow read and write I/O - Read Only: allow read I/O only - Blocked: deny read and write I/O • Redundancy through: - Configuration stored in non-volatile RAM and on the drives (COD). - Hot-swap support. 4 Intel® Integrated RAID Module RMS2AF040 and RMS2AF080 Hardware User's Guide