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Chapter 1 - System Introduction
1-5
PCI Bridge (PB)
The PCI Bridge (PB) is an I/O subsystem solution for high-performance systems.
The PB translates transactions between the system bus and the PCI buses using
32-byte buffers for inbound and outbound posting. The use of two PBs in the
system creates an architecture that allows even faster data transfers.
Memory Controller (MC)
The memory controller (MC) acts as an interface between the system bus and
system memory. It consists of the DRAM control (DC) chip and the data
path (DP) chip. The MC connects to the DRAM array through four memory
interface controller (MIC) chips. The MC supports 256-bit 4-way memory
interleaving resulting in more efficient memory traffic management.
1.1.3 SCSI Subsystem
The AcerAltos 19000 system supports an array of 14 hot-pluggable disk drive
trays through two 7-slot SCSI backplane boards. The trays accommodate wide
SCSI hard disks. With an onboard AIC-7880 SCSI controller, the burst transfer
rate can reach 20 MB per second.
1.1.4 Server Management
Acer Server Manager (ASM) Pro, a server management feature, monitors voltage
and CPU thermal stability, prevents data loss by prompt ECC memory error
reporting, maximizes system resources by indicating PCI bus utilization, and
promotes efficiency by minimizing system downtime. If this feature has been
implemented, refer to the Acer Server Manager (ASM) Pro User’s Guide for
information.
Remote Device Manager (RDM) permits system diagnosis from a remote site
through a modem. RDM facilitates fixing of certain detected problems, changing
system configuration or rebooting in the event of system failure. If this feature
has been implemented, refer to the RDM documentation for information.