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Appendix A: Subsystem Features
A.2 Controller Specifications
A.2.1 Configuration
Specification
RAID Levels
0, 1(0 + 1), 3, 5, 10, 30, 50, JBOD, and non-RAID disk
spanning
Host OS
Compatibility
Host OS independent; supports all major platforms
Host Interface
2 SCSI-320 channels via 2 dual-stacked VHDCI
connectors
Host Channels 2 pre-configured SCSI-320 host channels
Drive Interface
Supports 8 (A08U) or 12 (A12U) channel connection to
3Gbps SATA-II disk drives, SATA-I backward
compatible
Drive Channels
All drive channels are pre-configured, routed through a
back-end PCB and cannot be changed
Caching Mode Write-through or Write-back
Cache Memory
Pre-installed 256MB (or above) DDR RAM DIMM
with/without ECC, in one DIMM socket
Number of LUN’s Up to 32 per host ID
Multiple Target
IDs/Host Channel
Yes
Firmware on Flash
Memory
Yes
A.2.2 Architecture
Specification
CPU IBM PowerPC 750CXr
Gigabit Ethernet
One 10/100BasedT for local or remote management
access
DIMM Slot One 184-pin DDR DIMM module
ASIC Infortrend 64-bit chipset (ASIC266)
Flash ROM 32Mbit (4MB)
NVRAM 32KB with RTC
Hardware XOR Yes
Real-time Clock
For event messages with time record tracking and
scheduled maintenance tasks, e.g., Media Scan.
A-3
Controller Specifications