Array Performance Features, Fault Tolerance

Array Performance Features

Host data transfer rate	2.5 Gigabit/s per PCI Express* lane

Drive data transfer rate	3 Gigabit/s per lane

Maximum scatter / gather	26 elements

Maximum size of I/O requests	6.4 Mbytes in 64 Kbyte stripes

Max queue tags per drive	As many as the drive can accept

Stripe sizes	8, 16, 32, 64, 128, 256, 512 or 1024 KB

Max concurrent commands	255

Support for multiple initiators	Yes

Performance	Native command queuing

Flexibility	Drive migration, RAID level migration, Drive Roaming, Online
	Capacity Expansion - without reboot

Background services	Rebuild, Consistency Check, Migration, OCE, and Patrol Read

Cache options	Write-back or Write-through Read Ahead, Adaptive Read
	Ahead, NonRead Ahead, Cache I/O or Direct I/O

Self Monitoring Analysis and	Detects up to 70% of predictable disk drive failures and
Reporting Technology (SMART)	monitors the internal performance of all motors, heads,
support	and drive electronics.

Optional Battery Backup	Intel® RAID Smart Battery AXXRSBBU4 cache backup.
	Up to 72 hours of data retention. “Gas Gauge".

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, alarm;
	multiple retries; logs in NVRAM, event log, CIM, Smart,
	Intel® RAID Web Console 2

Intel® RAID Controller SRCSATAWB Hardware User’s Guide