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DCSE: PowerEdge 1550 Self-Study Version 0.3, 4 December, 2000
Page 6 Dell
System Chipset
The PowerEdge 1550 uses the ServerWorks Enterprise ServerSet™ III HE
–SL
chipset. The constituent chips of this chipset are:
• NCB20HE-SL – North Bridge
• OSB4 – South Bridge
• CIOB20 – Champion IO Bridge
The features of this chipset are discussed in the technical appendix.
Integrated SCSI
The PowerEdge 1550 uses an onboard Adaptec AIC-7899. This is the
same chip as used in the AHA
®
-2940UW/OF and AHA-2944UW/OF Host
Controllers.
The features of this chip are:
• 64-bit, 66-MHz PCI support.
• Dual independent SCSI busses.
• Full Ultra160/m and Ultra3 SCSI Domain Validation and CRC support.
• Enhanced Logical Unit Number (LUN) supports up to a maximum of 32
LUNs.
• Support for a combination of 16-bit Ultra160/m, Ultra3, Ultra2, Ultra, and
standard SCSI devices including disk drives, disk arrays, tape drives, CD-
ROM and CD-R drives, jukeboxes, removable drives, scanners, and
printers.
Microsoft
®
PC99 compliant.
• Microsoft Cluster Server compatible.
• PCI Hot-Plug compatible.
• Fully compatible with the AIC-3860 for single-ended device connection.
RAID
The PowerEdge 1550 will support two RAID options: PERC 3/DCL at
RTS and PERC 3/DC in Q1 ’01 in conjunction with support of external
storage. PERC 3/DCL is a new short (vs. full length) RAID controller that
will only be offered on the PowerEdge 1550. The PERC 3/DC will be
offered across the Dell product line.
The “3” represents Ultra3 SCSI technology (160 MB/s), “DC” stands for
dual channel, and “L” stands for light (vs. the standard DC controller).
The primary differences between PERC 3/DCL and PERC 3/DC are that
the standard PERC 3/DC will support more memory (128 MB vs. 64 MB),