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Sun Enterprise 250 Server Owner's Guide

About the Sun Enterprise 250 Server

The Sun Enterprise 250 server is a high-performance, shared memory, symmetric-multiprocessing server system. It is designed around Sun's high-speed Ultra Port Architecture (UPA) cross-bar system interconnect and Sun's UltraSPARCTM II processors to deliver outstanding overall system performance.

The system is housed in a roll-around tower enclosure, which measures 20.4 inches high, 10.3 inches wide, and 27.1 inches deep (51.7 cm x 26.2 cm x 68.8 cm). The system has a maximum weight of 118 lb (53 kg).

Processing power is provided by up to two modular UltraSPARC II CPUs, each of which comes with 1 Mbyte or 2 Mbytes of local high-speed external cache memory. The system UPA's clock rate synchronizes automatically to the clock rate of the installed CPUs, and the UPA bus operates at a clock rate that is one third or one fourth that of the CPU modules. For more information about CPU modules, see "About CPU Modules".

System main memory is provided by up to sixteen memory DIMM modules, each of which is capable of storing 32, 64, or 128 Mbytes of data. Total main memory is expandable up to 2 gigabytes. To enhance memory I/O performance, the system transfers 64 bytes of data into or from memory on each memory transfer. For more information about system memory, see "About Memory".

System I/O is handled by two separate Peripheral Component Interconnect (PCI) buses. These industry-standard buses support all main logic board I/O and up to four PCI interface cards. One PCI bus operates at a 33-MHz clock rate and supports up to three PCI cards, while the other bus can operate at either 33-MHz or 66-MHz and supports one PCI card. All PCI cards plug into slots provided on the system's main logic board. For more information about PCI buses, see "About Peripheral Component Interconnect (PCI) Buses".

Internal disk storage is provided by up to six hot-swappable 1-inch or 1.6-inch high, 3.5-inch wide, UltraSCSI disk drives. All six drives are supported by a 40-Mbyte per second UltraSCSI interface provided directly on the system's main logic board. For more information about disk storage, see "About Internal Disk Drives".

External multi-disk storage subsystems and RAID storage arrays can be supported by installing single-channel or multi-channel PCI host adapter cards along with the appropriate system software. Software drivers supporting SCSI and other types of devices are included in the Solaris operating environment.

An internal CD-ROM drive is standard on the Enterprise 250 server. The CD-ROM drive has multimedia features, which include multi-session capability and fast access for image and video data. An optional 1.44-Mbyte, 3.5-inch diskette drive is also available.

A 5.25-inch half-height (1.6-inch) bay is provided at the front of the system, which may be used to house a removable media SCSI device--such as an 8-mm tape drive, a 4-mm DDS-2 or DDS-3 tape drive, or a quarter-inch cassette tape drive. For additional details, see "About the SCSI Removable Media Bays and the External SCSI Port".

Up to four external tape devices can be attached to the standard 68-pin Fast/Wide SCSI port provided on the system's rear panel. Additional external tape devices can be supported with appropriate PCI host adapter cards.

The Enterprise 250 server can easily be connected to either a 10-Mbps or a 100-Mbps Ethernet by means of an auto-sensing Ethernet interface provided on the system's main logic board. Additional Ethernet interfaces or connections to other networks, such as FDDI, ATM, or token ring, can be provided by installing the appropriate PCI interface cards. For more information, see Chapter 10, Administration and Networking.

The system console device can be either a standard ASCII character terminal or a local windowing subsystem. The ASCII terminal connects to the one of the system's two serial ports, while a local graphics console requires installation of a PCI frame buffer card, monitor, keyboard, and mouse. System administration can also be performed from a remote workstation connected to the Ethernet.

The Enterprise 250 server provides two serial communications ports through a pair of DB-25 connectors located on the rear panel. It also provides one external, 2-Mbyte per second, bidirectional, Centronics-compatible, EPP parallel port for connecting the system to a local printer or other compatible parallel device.

Power is provided by one or two 360-watt power supplies. System configurations with two power supplies provide both N+1 redundancy and full hot swap capability. For more information about the power supplies, see "About Power Supplies".

The Enterprise 250 server can easily be installed in a standard 19-inch rack. An optional rackmounting kit is available for installing the server into any 29- to 34-inch deep EIA 19-inch rack with at least 6 rack units (10.5 inches) of vertical mounting space and sufficient load-bearing capacity.

System reliability, availability, and serviceability are enhanced by features that include:

For additional details, see "About Reliability, Availability, and Serviceability Features".