Acer SmartRAID V Bedienungsanleitung Seite 31

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About Your New SmartRAID V Controller
SX405x modules attach to the SmartRAID V controller and do not require
an additional slot in the host system:
A single channel SX405xU2-1 Ultra2 SCSI Bus Expansion Module adds
one SCSI channel and provides one external Very High Density Cable
Interconnect (VHDCI) 0.8 mm connection and one internal high-
density 68 pin-connection.
A dual channel SX405xU2-2 Ultra2 SCSI Bus Expansion Module adds
two SCSI channels and provides two external VHDCI 0.8 mm
connections and two internal high-density 68-pin connections.
A Fibre Channel SX4055F Bus Expansion Module adds a single FC-AL
bus with a High Speed Serial Data Connector (HSSDC). Using this
module with a Fibre Channel controller provides dual-loop
redundancy.
RA4050 RAID Accelerator Features
The RA4050 RAID Accelerator module adds up to 64 MB of cache
hardware RAID 5 and 0+5 to a Century controller or additional cache and
hardware XOR to a Decade controller. The RA4050 connects to the end of
the controller and does not require an additional slot in the host system.
The RA4050 hardware cache can provide a substantial performance
improvement in systems with heavy disk I/O load, such as CAD
workstations, and in network servers running operating systems such as
Windows NT, Novell NetWare or UNIX.
The RA4050 supports up to 64 MB of cache using four SIMM sockets. Each
socket accepts either a 16MB or 64MB standard 32- or 36-bit
2
single-sided,
low-profile 60ns (or faster) EDO SIMM, or one of the DPT ECC SIMMs
listed below:
Model Description
SM4050-16 16 MB ECC SIMM
SM4050-64 64 MB ECC SIMM
DPT SM4050 SIMMs are recommended for systems where data integrity
is critical. Although, standard EDO memory modules can be used to
provide RAM for the cache, SM4050 SIMMs protect the cache with ECC
capability. The green ECC Enabled LED is lit when DPT memory is
installed. Refer to Appendix A, Assembly Drawings for the location of
this LED.
2
The parity bit is not used on 36-bit EDO SIMMs, however, the SIMMs will function in the controller as
non-parity memory.
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