Intel SRCU41L User Manual - Page 17

Overview 1.2 Features Features of the Intel® Raid Controller SRCU41L include: • support for hard drives with capacities greater than eight Gbytes • online RAID level migration • RAID remapping • no reboot necessary after expansion • Intel I/O Processor 80302 @ 100 MHz PCI 64/100 • more than 200 Qtags per array • user-specified rebuild rate • Wide Ultra320 LVD SCSI performance up to 320 Mbps • 64 Mbytes of synchronous dynamic random access memory (SDRAM) integrated on the board for the Intel® SRCU41L Raid Controller. • one internal and one external SCSI connector for the Intel® Raid Controller SRCU41L • support for RAID levels 0, 1, 5, 10, and 50 • advanced array configuration and management utilities • online capacity expansion and raid configuration simple and full featured BIOS tool • support for up to 14 SCSI drives per channel on storage system with SAF-TE enclosures (SCSI accessed fault-tolerant enclosures): 15 SCSI drives per channel for other configurations • 32 Kbits x 8 NVRAM for storing RAID system configuration information; the Intel® Raid Controller SRCU41L firmware is stored in flash ROM for easy upgrade. Note: Battery backup is available for the Intel® SRCU41L Raid Controller through a daughter card. You can purchase the controller with the battery backup unit (BBU) or purchase the BBU separately. 1.2.1 Drive Roaming Drive roaming (also known as configuration on disk) is when the hard drives are moved around in a given configuration. Configuration information is saved in both nonvolatile random access memory (NVRAM) on the Intel® SRCU41L Raid Controller and in the hard drives attached to the controller. This maintains the integrity of the data on each drive, even if the drives have changed their target ID. Before performing drive roaming, make sure that you have first powered off both your platform and your drive enclosure. 1.2.2 Drive Migration Drive migration is the transfer of a set of hard drives in an existing configuration from one controller to another. This is always done on a blank controller. Drives should not be roamed and migrated at the same time. Intel® Raid Controller SRCU41L User Manual 3