Hardware User's Guide

22 Intel® RAID Controller RS25SB008 Hardware User’s Guide
Fault Tolerance
Table 9. Fault Tolerance Features
Maximum size of I/O requests 6.4 Mbytes in 64 Kbyte stripes
Maximum queue tags per
drive
As many as the dri
ve can accept
Stripe sizes 8, 16, 32, 64, 128, 256, 512, or 1024 KB
Maximum concurrent
commands
255
Support for multiple initiators Ye s
Performance Native command queuing
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 RS25SB008
Specification Intel
®
RAID Controller RS25SB008
Self Monitoring Analysis and
Reporting Technology (SMART)
sup
port
• 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