Chaparral G5312, User Manual

Page: 13 / 160

Introduction
1-3
!
Supports full backward compatibility for asynchronous, fast, Ultra 1, and
Ultra2 SCSI (80 MB/sec)
!
SCSI terminators and termination power sources must reside in the enclosure
subsystem
Note:
There is no support for high-voltage differential (HVD) SCSI
(RS-485 SCSI-3 compliant).
Motherboard Disk Cache (G-Series)
!
Adaptec AIC-2100 dual-port PCI disk cache ECC memory controller
!
PCI-to-PCI Bridge providing full CPU and PCI bus concurrency
!
Disk cache size modularity using standard SDRAM 168-pin ECC DIMM
(16 MB to 128 MB)
!
Battery backup switching regulator and control interface for disk cache memory
Battery Interface (G-Series)
!
Battery charger and battery control interface
!
Integrated software-controlled battery charger, diagnostics, and periodic battery
monitoring
!
Battery pack connection to the motherboard or to the backplane interface
!
Nickel Metal Hydride (NiMH) battery pack delivery of a minimum of 72 hours
continuous backup to disk cache memory
Hardware Configuration and Management Support
(G-Series)
!
Dual RS-232 serial ports
!
Analog-to-digital converter for power, temperature, and enclosure monitoring
!
Onboard standard PC-type lithium disk battery for continuous Real-Time Clock
(RTC) power when the unit is shut down
!
Dedicated channel activity LEDs, status LEDs, and alarm I/O to backplane
connector interface