Hardware User's Guide

26 Intel® RAID Controller RS25AB080 Hardware User’s Guide
Fault Tolerance
Table 10. Fault Tolerance Features
Flexibility • Drive migration
• RAID level migration
• Drive Roaming
• Online Capacity Expansion - without reboot
Background services • Rebuild
• Consistency Check
• Migration
• OCE
• Patrol Read
Cache options • Write-back or Write-through
• Read Ahead
• Adaptive Read Ahead
• Non Read Ahead
• Cache I/O or Direct I/O
• Disk Cache
Specification Intel
®
RAID Controller RS25AB080
Specification Intel
®
RAID Controller RS25AB080
Self Monitoring Analysis and
Reporting Technology (SMART)
support
• Detects up to 70% of predictable disk drive failures
• Monitors the internal performance of all motors, heads,
and drive electronics.
Backup Unit • Super Cap 2 cache backup unit
• Up to 48 hours of data retention, longer life time than
battery backup unit.
Drive Replacement • Auto detection of failure
• Hot-plug
• Hot-swap
Drive Rebuild Using Hot Spares • Automatic at fail
• Dedicated per Array
• Global for any array
• Auto-resume of initialization or rebuild on reboot.
Error Checking and Indication • Parity generation and checking, automatic consistency
checking.
• Patrol reads
• Activity and fault LEDs
• Multiple retries
• Logs in NVRAM, event log, CIM, Smart, and Intel
®
RAID Web Console 2.