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Hardware » Books » Administrative »
SGI 1400 Server Family User's Guide
(document number: 007-3978-001 / published: 1999-07-22)
table of contents | additional info | download find in page
Chapter 1. Chassis Description
The SGI 1400 server is shipped as either an upright (pedestal mode) unit, or it may be ready for rack mounting (rack mode). Figure 1-1 shows examples of these configurations. Table 1-1 provides the basic physical requirements for the server. Instructions for mounting the server in a rack, are included in Appendix B. Note that the rack installation should be performed by a technically trained or certified installer.
The SGI 1400 family of servers includes products such as the SGI 1400M (which uses a Microsoft Windows operating system), and the SGI 1400L which uses a Linux operating system. While its operating system (OS) gives the server a particular functional interface, the basic hardware functions, diagnostics, and configuration are the same within the SGI 1400 server family. The generic terms “server” and “SGI 1400 server” are used throughout this document, and apply to all systems in the SGI 1400 family of servers.
Table 1-1. SGI 1400 Server Physical Specifications
Specification
| Pedestal Mode
| Rack Mode
|
|---|
Height
| 48.26 cm (19 inches)
| 7u
| Width
| 31.12 cm (12.25 inches)
| 19-inch rack
| Depth
| 63.5 cm (25 inches)
| 25 inches
| Weight
| 38.25 kg (85 lbs) minimum
configuration
45 kg (100 lbs) maximum
configuration
| 38.25 kg (85 lbs) minimum
45 kg (100 lbs) maximum
| Required front
clearance
| 25.4 cm (10 inches) (inlet airflow
<35 ˚C / 95 ˚F)
| 25.4 cm (10 inches) (inlet airflow
<35 ˚C / 95 ˚F)
| Required rear
clearance
| 20.3 cm (8 inches) (no airflow
restriction)
| 20.3 cm (8 inches) (no airflow
restriction)
| Required side
clearance
| 0.0 cm/inches (additional side
clearance required for service)
| N/A (must be removed for side
access)
|
The system's galvanized metal chassis minimizes EMI and radio frequency interference (RFI). The removable access cover is attached to the chassis with three screws. A front subchassis and an electronics bay (at the rear of the main chassis) both rotate outward and can be removed entirely to provide access to internal components. Only trained maintenance personnel should work on the system's internal components.
The removable front panel provides access to the 3.5- and 5.25-inch peripheral bays in the front of the chassis. Table 1-2 lists the main features of the server chassis.
Table 1-2. Chassis Features Summary
Feature
| Description
|
|---|
Front accessible drives
| Installed:
1.44 MB, 3.5-inch diskette drive, accessible from front subchassis.
CDROM drive.
Expansion capacity:
Two 5.25-inch-wide bays that are externally accessible, designed to hold
half-height standard removable media devices.
The externally accessible hard-drive bay holds up to six 1-inch drives.
| Expansion slots and covers
| Up to eight slot covers can be used; every slot opening that does not have an
optional PCI (add-in) board installed must have a slot cover installed.
| Baseboard
| Form-factor, 16 × 13 inches, ATX I/O.
| Power supplies
| Three 400-watt power supplies with integrated cooling fans and detachable AC
power cords.
| Cooling
| A total of 11 internal fans provide cooling and airflow: six system fans inside the
chassis, one fan on each of the three power supplies, and two fans for cooling
hard drives.
|
Chassis Front Controls and Indicators
Figure 1-2 shows the server's front controls, option bays, and drives.
Standard front controls include the following:
Power On/Off button (holding down this button for more than four seconds causes a power–button override to the PIIX4E when you release the button)
Sleep/Service button (holding down this button for less than four seconds enters sleep mode, which requires an ACPI-compliant operating system; holding it down for more than four seconds enters service mode, which powers down the electronics bay but leaves hot-swap and peripheral bays running)
Reset button
Front panel LEDs (Top to bottom: top five are power on, disk bay power on, hard-drive activity, fan failure, power supply failure; bottom six are hard-drive failure LEDs, labeled 0-5)
NMI button
Additional front component features include:
A standard Diskette drive
A standard CD-ROM drive
System security latch
EMI shield lock
Six internal hard drive bays
Two removable media drive bays
Chassis Back Controls and Features
Figure 1-3 shows the controls, connectors, and features on the rear of the server.
Figure 1-4 shows a side view of the chassis and locations of key internal components.
The components shown in Figure 1-4 are listed as follows:
The front swing-out subchassis
Diskette drive
Main chassis
Power backplane
Power supplies
Baseboard (processor board)
Lift-out electronics bay
SCSI hard drives bay
Rear foam cover
Foam fan housing
Foam fan housing cover
Foam rear cover
Server Peripherals Overview
The following sections describe standard and optional peripherals available with the SGI 1400 server system.
The 3.5-inch diskette drive in the 3.5-inch peripheral bay supports 720 KB, 1.2 MB, and 1.44 MB media. The drive is externally accessible from the front of the system.
The chassis contains one hard disk drive bay that holds 3.5-inch-wide (1” high or 1-5/8” high) LVDS SCSI drives with internal cabling. The backplane is hot-swap-capable and can accommodate either six 3.5–inch-wide (1” high) hard drives (or three 1-5/8” high hard disks). The drives are accessed externally from the front of the system. Contact your sales or service representative for information on obtaining additional disks or drive carrier assemblies.
As part of the hot-swap implementation, an integral drive carrier and heatsink assembly is required for the hard disk drives. The drives are mounted in the carrier/heatsink assembly with four screws and the carrier snaps into the chassis. For information on how to install the carrier/heatsink assemblies, see “Mounting a SCSI Hard Disk Drive in a Carrier” in Chapter 5.
A single metal EMI shield and plastic door cover the hard drive bays. Drives can consume up to 22 watts of power and must be specified to run at a maximum ambient temperature of 55 °C.
The system was designed to use an optional Redundant Array of Independent Disks (RAID). A software implementation with onboard SCSI or an add-in board can be used to set up RAID applications. Ask your sales or service representative for information on installation and use of RAID options.
5.25-inch Removable Media Device Bays
The chassis has three 5.25-inch half-height bays that are accessible from the front of the system. These bays are intended to provide space for optional removable media devices.
You can convert the 5.25-inch bays to a single full-height bay. We recommend that you do not use these bays for hard disk drives, because they generate EMI (increasing ESD susceptibility), and because of inadequate cooling. To maintain compliance with electromagnetic compatibility (EMC) regulations, each 5.25-inch drive bay must be configured with either:
An EMC-compliant 5.25-inch peripheral device, or
A metal cover plate, available from your sales or service representative
 | Note: Integration of the 5.25-inch peripheral bay can affect EMC compliance and is a regulated activity.
|
 | Caution: To avoid damage to a 5.25-inch peripheral device, ensure the EMI gasketing provided in the lower bay does not bridge or short any open circuits of the exposed peripheral device. If the 5.25-inch device has open circuits, install it in one of the two upper bays.
|
The chassis comes configured with three 400-watt power supplies, each designed to minimize EMI and RFI. Each supply auto-senses within the following voltage ranges and is rated as follows:
The DC output voltages of each power supply are:
Power is sourced through the power cable to the 20-pin main connectors on the baseboard. Remote sensing signals are provided through the cable to the 14-pin auxiliary connector on the baseboard.
The SGI 1400 server system includes the maximum (6) fan configuration for internal cooling and airflow. There is also one fan for each of the three power supplies, and two fans specifically for cooling the hard drives.
 | Note: The access cover must be installed on the system for proper cooling.
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SGI 1400 Server Family User's Guide
(document number: 007-3978-001 / published: 1999-07-22)
table of contents | additional info | download
Front Matter
About This Guide
Chapter 1. Chassis Description
Chapter 2. System Processor Board Description
Chapter 3. Configuration Software and Utilities
Chapter 4. Solving Problems
Chapter 5. Installing or Replacing Drives and Power Supplies
Appendix A. Environmental and Regulatory Specifications
Appendix B. SGI 1400 Server Rackmount Installation
Index
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