Page 1
Compaq AlphaServer DS20E Systems
Technical Summary
Page 2
Contents
System Overview 1
Features and Benefits 1
Architecture 2
System Block Diagram
System Board 3
Component and Connector L ocations
Third-Generation Alpha Chip 4
Chip Operation
Alpha 21264 Features
Processor Module 4
Processor Configurati on Rules
Processor Upgrade
Memory 5
Memory Options
Memory Configuration Rules
System I/O 5
PCI Bus
ISA Bus
I/O Configuration Rules
I/O Implem entation
System Control 6
Storage 6
Fibre Channel
RAID (Redundant Array of Independent Disks)
Server Management 7
Operational Management
Platform Management
Error Reporting
Reliability, Availability, and Maintainability 7
Processor Features
Memory Features
I/O Features
System Features
Installation and Maintenance 8
Clustering 8
PCI to Memory Channel Interconnect
Operating System Support
Performance 9
Sources of Performance Information
Information for Compaq Partners
Service and Support 9
Hardware Warranty
Software Warranty
Compaq AlphaServer DS20E System Diagrams 10
System Features at a Glance 11
Physical Characteristics 12
Page 3
Compaq AlphaServer DS20E Systems
The Compaq AlphaServer DS20E system delivers high
performance for business, technical, and scientific
applications at an affordable price. As a high-capacity
database server, high-performance application server,
Network File System (NFS) server, or Internet server, the
AlphaServer DS20E delivers exceptional value and
investment protection.
Compaq AlphaServer products use the 64-bit Alpha RISC
architecture that supports multiple operating systems:
Tru64 UNIX, OpenVMS, and Linux.
More information on Compaq AlphaServer DS20E systems
is on the World Wide Web:
http://www.compaq.com/alphaserver/platforms.html
.
System Overview
The Compaq AlphaServer DS20E uses the third-generation
Alpha 21264 processor. Two speeds are avail able, the EV67
chip, which runs at 667 M Hz and the EV68 chip, which runs at
833 MHz. The switch-based system inter connect exploits the
full potential of these Alpha chips.
The system is available as a pedestal or as a rackmount system .
The components in both are identical; the rackmount variant is
simply rotated to its side. The rackmount syste m requires 5U
space and can be mounted in a 67- or 79-inch M-series cabinet,
along with additional disks. In the largest cabine t up to 6
systems and 4 StorageWorks she l ves can be installed.
The DS20E system is available with one or two processors.
The system accommodates six hard disks, a floppy diskette
drive, a CD-ROM, and space for one additional 5.25-inch
removable media device. The system supports up to 218.4 GB
of internal storage using 36.4 GB disks.
There are 6 PCI slots, one of which could be used for an ISA
device. Integrated on the system board are controllers for a
SCSI tape device, a di skette, two serial ports, one parallel port,
and the keyboard and mouse.
Three operating syst ems are supported: Tru64 UNIX,
OpenVMS, and Linux. Customers can orde r the system that
meets their pre s ent application needs; the y choose the size of
the system disk, an Ultra3 SCSI adapter, and an Ethernet
adapter. Systems can also be configured in a choice of two
cabinet enclosures: a 67-inch or 79-inch M-series cabinet.
Features and Benefits
• Leadership 64-Bit Architecture
The Alpha 64-bit architecture was introduced with the Alpha
21064 chip in 1992 and now the 21264, builds upon that
proven architecture.
• Performance
The Alpha 21264 chip when combined with a switch-based
interconnect demonstrates its full potential. This switch-based
system provides a memory bandwidth of up to 5.2 Gbytes/sec
(peak) using two 256-bit memory buses running at 83 MHz.
• Reliability and Availability
The AlphaServer DS20E uses the latest technologies to
achieve redundancy, error correction, and fault management.
The balance between simple error detection and error correction provides high availability at low cost. Hot swappable
disks, fans, and power suppl i es allow repairs to be done without shutting the system down.
• DS20E Workstation
The pedestal package can also be ordered as a workstation.
Page 4
Architecture
This system is designed t o maximize the pote nt i al of the Alpha
21264 chip. The traditional bus interconnect has been replaced
by a switch-based interconnect system. Wit h a bus design, the
processors, memory, and I/O modules must share the bus. As
the number of bus users increases, the transactions interfere
with one another, increasing latency and decreasing a ggregate
bandwidth. However, with a switch-base d syst em there is no
degradation in performance as the number of CPUs, me mory,
and I/O users incre ase. Although the users inc rease, the speed is
maintained.
With a switch-based, or point-to-point interconnect, the performance remains c onst ant, even though the number of transactions
multiplies. The switched system interconnect uses a set of complex chips that route the traffic over multiple paths. The chipset
consists of one C-chip, e i ght D-chips, and two P-chips,
Command, Address, and Control lines for each Memory Array
• C-chip. Provides the interface from the CPUs and main
memory. Although t here is only one in the system, it
allows each CPU to do transactions simultaneously.
• D-chips. Provide the data path for the CPUs, main
memory, and I/O.
• P-chips. Provide the interface to two independent 64-bit
PCI buses.
The DS20E system supports up to two CPUs and up to 4
Gbytes memory in 16 D IMM slots. Each memory option
contains four DIMMs, so each bank has four DIMMs.
Two 256-bit memory buses support four memory arrays,
yielding a 5.2 Gbytes/sec system bandwidth. Transactions are
ECC protected. Upon the receipt of data, the receiver checks
for data integri ty and corrects any e rrors. Commands a nd
addresses are parity protected.
D/
CM
Addr.
CPU 0
B-cache
C-chip
Probe/
Addr.
Probe/
Addr.
D/
CM
Addr.
CPU 1
(optional)
B-cache
Control lines for D-chips
CAPbus
P-chip
P-chip
CPU
Data
Bus
PAD
Bus
64 bit PCI
8 D-chips
64 bit PCI
Memory
Data
Bus
1 or 2
Memory
Banks
1 or 2
Memory
Banks
PKW
1400-99
System Block Diagram
Page 5
System Board
The interconnect switch is implemented on the system board
by the chipset consisting of one C-chip, two P-chips, a nd eight
D-chips. This complex chipset provides the data and address
path between the CPUs, memory, and the I/ O subsystem.
A flash ROM holds the c onsole code and the NVRAM data.
Switches are located near the CD-ROM connector. One of
these switches must be set when the system is upgraded to
faster processors.
Integrated into the system board are c ont rollers for the floppy
diskette, the CD-ROM, a SCSI tape drive, two serial ports, one
parallel port, and keyboard and mouse.
1
DIMM Slots
Parallel Port
COM 1
COM 2
Keyboard & Mouse
DIMM Slots
PCI 0 Slot 7
PCI 0 Slot 8
PCI 0 Slot 9
3
1
3
0
2
0
2
D
Chip
Chip
2
0
2
0
3
1
3
1
D
Chip
D
D
Chip
C
Chip
Connectors are provi ded for the following:
2 CPU modules
16 DIMM memory modules
6 PCI devices
1 ISA device
1 floppy diskette drive
1 IDE CD-ROM
I/O panel for pa rallel port, COM1 and COM2 ports, keyboard
and mouse
CPU 0
D
D
Chip
Chip
D
D
Chip
Chip
CPU 1
P
ChipPChip
SCSI
Speaker
Firmware Flash ROM
PCI 1 Slot 7
PCI 1 Slot 8
PCI 1 Slot 9
ISA Slot
PK-0320C-99
Component and Connector Locations
Floppy
CD-ROM
Switches
Page 6
Third-Generation Alpha Chip
The third genera tion of the Alpha microprocessor, the Alpha
21264, is a superscalar superpipelined implementation of the
Alpha architec ture. The fir st offering of this chip was known as
EV6. These systems are offered with the EV67 chip (.28
micron) and the EV68 chip (.18 micron). Each chip has over
15.2 million transistors. In our discussion here, the Alpha
21264 designation applies to al l variants of the chip.
Designed for performance, the Alpha 21264 achieves this goal by
carefully studied and simulated architectural and circuit analysis.
The 21264 memory system also enables the high performance
levels. On-chip and off-chip caches provide for very low latency
data access, which allows for very high bandwidth data access. (In
DS20E systems the size of the off-chip cache is 8 MB running at
222 MHz (dual data rate cache) for EV67 and 8 MB running at 278
MHz DDR for EV68.)
Internal to each chip is a 64-Kbyte instruction cache (I-cache)
and a 64-Kbyte data cache (D-cache).
• I-cache. 64 Kbytes, two-way set -associative, vir tually
addressed cache with 64-byte blocks
• D-cache. 64 Kbytes, two-way set -associative, virtually
indexed, physically tagged, writeback cache with 64-byte
blocks
Chip Operation
Several key design choices were made i n the chip architect ure
to maximize performance: Four instructions are fetched each
cycle, and then how those instructions are handled boosts the
speed of execution. Register renaming assigns a unique storage
location with each write reference to a register, avoiding register
dependencies that can be a potential bottleneck to processor
performance.
Another design fea t ure, out-of-or der execution, permits
instructions to execute in an order different from the order that
the instructions are fetched. In effect, instructions execute as
soon as possible. This allows for faster e xe cution since critical
path computations ar e started and completed as soon as
possible.
In addition, the Alpha 21264 employs speculative execution to
maximize performance. It speculatively fetches and executes
instructions even though it may not know immediately whether
the instruction will be on the final execution path. This is
particularly use ful, for instance , when the 21264 predicts
branch directions and speculatively executes down the
predicted path. The sophisticated bra nch prediction in the
21264 coupled with the specul ative and dynamic e xecution
extracts the most instruction parallelism from applications.
For more inform ation about the chip, see:
http://www.compaq.com/alphaserver/download/ev6chip.pdf
Alpha 21264 Features
• Out-of-order instruction execution
• Large (64 Kbyte) on-chip data and instruction caches
• Improved branch prediction through intuitive execution
• Register renaming
• Increased bandwidth for high-speed access to second-level
cache and system memory
• Motion video instructions
• Square root and divide instructions
• All instructions are 32 bits long and have a regular
instruction format
• Floating-point unit, supports DIGITAL and IEEE floating-
point data types
• 80 integer registers, 64 bits wide
• 72 floating-point re gisters, 64 bits wide
Processor Module
An AlphaServer DS20E c an have one or two CPU modul es.
In addition to the Alpha 21264 chip, the CPU module has a n
8-Mbyte second-level cache and a DC-to-DC converter with
heatsink that provides t he required voltage t o the Alpha chip.
Power-up diagnostics a re in a flash ROM on the module.
Cooling of the microprocessor chip is provided by a fan on the
chip heatsink, as shown here.
PK0237
Processor Configuration Rules
The first CPU module i s i nst alled in CPU slot 0. The sec ond
CPU is installed in CPU slot 1.
Processor Upgrade
Upgrading to faster processor modules requires setting a
switch on the system boar d.
Page 7
Memory
The switch inter connect can move a l arge amount of data over
two independent memory data buses. Ea ch memory bus is 256
bits wide (32 bytes). The memory bus speed is 83 MHz. This
yields 2.67 GB/sec bandwidth per bus (32 x 83 MHz = 2.6
GB/sec). With two CPUs the bandwidth becomes 5.2 GB/sec.
Memory throughput in this system is maximiz ed by the
following features:
• Two 256-bit wide memory data buses
• Very low memory latency (120 ns) a nd hi gh bandwidth
with 12 ns clock
• Numerous reliability and availability features, such as
ECC memory and com mand/address parity
Memory Options
Each memory opt ion consists of four 200-pin DIMM modules.
The DIMMs are synchronous DRAMs. Eac h syst em supports
up to four memory options (16 DIMMs) for a total of 4
gigabytes of mem ory. The options run at a speed of 83 MHz.
Memory options are supported in the following sizes:
• 256 Mbytes
• 512 Mbytes
• 1 Gbyte
Memory Configuration Rules
• A memory option consi s ts of four DIMM s , and all four
DIMMs must be the same size.
• Convention places the largest memory option in slots
marked 0 on the system board.
• Other memory opti ons can be the same size or smaller
than the first memory option.
• Memory options must be inst alled in slots designated for
each bank. The first bank goes into slots marked 0, the
second bank into slots marked 1, and so on.
System I/O
There are two 64-bit PCI buses. Industry-standard PCI I/O
buses allow you to use inexpensi ve, widely availabl e I/O
options. Both 32-bit and 64-bit PCI options can be used.
Six slots can be used for PCI controllers, or five slots for PCI
and one slot for an ISA option.
PCI Bus
The industry-standard PCI bus is the number one choice for
high-performa nce I/O options, such as disk storage and highperformance video applications.
The PCI bus implementation has the following characteristics:
• Fully compliant with the PCI Version 2.1 Specification
• Operates at 33 M Hz, delivering a peak bandwidth of 500
MB/sec; over 250 Mbytes/sec for each PCI bus
• Supports 6 option slots
• Supports peer-to-peer I/O operations
• Supports three address spaces: PCI I/O, PCI mem or y, and
PCI configuration space
• Supports byte/word, tri-byte, and longword operations
• Exists in noncached address space only
The Adaptec 7895 chip provides the bridge from PCI to SCSI,
providing for support of an internal tape drive.
ISA Bus
The ISA bus provides syste m support functions and the use of
peripheral devi ces. An ISA connector is available for devices
that provide functions not offered in a PCI i mplementation.
The Cypress SIO chip, w hich provides the bridge bet ween the
PCI bus and the ISA bus, incorporates the logic for the
following:
• ISA interrupt controller
• Speaker driver
• Decoding and control for utility bus peripheral devices
• IDE interface for CD-ROM (no other IDE devices are
supported)
I/O Configuration Rules
A graphics adapter, if present in the system, must be installed
in PCI 0.
Page 8
I/O Implementation
Two separate 64-bit PCI buses are provided, each with three
slots. As can be seen in the block diagram, the C-chip controls
both PCI control chips.
PCI 0 offers the following:
• Slots for three PCI de vices or two PCI device s and one
ISA device
• Integrated control for system functions and bulkhead ports
• Integrated control for two IDE ports
PCI 1 offers three PCI slots.
At the rear of the system are connectors offering access to two
serial communi cations ports, one parallel port, and ports for
the keyboard and mouse. Si x breakouts are also on the back
panel.
System Control
The system features module provides f or the following:
• Remote server management
• Environmental monitoring
• Power system event data collection
The module is locat ed at the top rear of the system.
PCI Bus 0
P-chip 0
Flash ROM
(NVRAM functions)
C-chip
Interrupts
Config
P-chip 1
Block Diagram of I/O Control
Storage
The AlphaServer DS20E system offers up to nine internal
storage devices including a CD-ROM drive, floppy diskette
drive, one additional 5.25-inch rem ovable media device, and
six hot-swap disk drives. The system supports up to 218. 4
Gbytes of internal st orage (using 36.4 GB disks). The disk
cage supports up to six Ultra 3 SCSI Universal 1-inch disk
drives (9.1, 18.2, or 36.4 GB). The drives are avai lable at
10,000 or 15,000 RPM.
Fibre Channel
Available on these AlphaServer systems is the next storage
interface, Fibre Channel, which eliminates issues with today’s
SCSI interfaces such as distance, bandwidth, scalability, and
reliability. Fibre Channel (FC) is the answer to not only
server-to-stor age connections but also to ser ver-to-server
networking, because multiple protocols are supported. SCSI,
TCP/IP, video, or raw data can all take advantage of highperformance , reliable Fibre Channel technology.
Cypress
Chip
ISA
Keyboard
Mouse
IDE
Adaptec
Chip
PCI Slot
PCI Slot
PCI Bus 1
Super
I/O
Tape
ISA Slot
Com1
Com2
Printer
Floppy
PK-0319D
With the KGPSA PCI Fibre Channel adapter, the DS20E
systems provide a storage interconnect that is 2.5 times as fast
as UltraSCSI: 100 vs 40 M bytes/sec data throughput. The
KGPSA adapter all ow s you t o manage storage incl udi ng the
HSG80 RAID controll er in a switched FC topology.
RAID (Redundant Array of Independent Disks)
The system can be configured with optional PCI RAID
controllers to organize disk data cost- effectively, improve
performance, and provide high levels of storage integr ity.
The optional RAID controllers have the following features:
• Support for hot-swap drives
• Automatic rebuild after hot swap
• Console support for booting system from RAID
• RAID levels 0, 1, 0+1, 5
• Optional write cache
• Optional read cache
• Support for command queuing
Page 9
Server Management
The AlphaServer products support important operational and
platform management requirements.
Operational Management
Server/Network Management . Comaq Insight Manager is
included with every syst em. This software tool allows you to
monitor and control Alpha based servers. Insight Manager
consists of two component s: a Windows-based console appl i cation and server - or client-based management data collection
agents. Management agents monitor over 1,000 management
parameters. Key subsystems are inst rumented to make he alth,
configuration, and performance data available to the agent
software. The agents act upon that data, by initiating alarms in
the event of faul t s and by providing updated management information, such as network interface or storage subsystem performance statistics.
Remote Server Management. An integrated remote management console (RMC) lets the operator perform several tasks
from a serial console: monitor the system power, temperature,
and fans, and reset , halt, and power the system on or off, regardless of the operating system or hardwa re state. The m oni toring can be done locally or remotel y through a modem.
Platform Management
The AlphaServer DS20E syste ms support platform
management ta sks such as manipulating and monitoring
hardware per formance, configuration, and errors. For
example, the operating systems provide a number of tools to
characterize system perfor mance and display er rors logged in
the system error log file.
In addition, system c onsol e firmware provides hardware
configuration tools and diagnostics to facilitate quick hardware
installation and troubleshooting. The system ope rator can use
simple console commands to show the system confi guration,
devices, boot and oper ational flags, and recorded errors. Also,
the console aids in inventory support by giving access to serial
numbers and revisions of hardware and f irmware.
Error Reporting
Compaq Analyze, a diagnostic tool used to determine the
cause of hardware failures, is installed with the operating
systems. It provides automatic background a nalysis, as it
constantly views and re ads the error log fi l e. It analyzes both
single error/fault events and multiple events. When an error
condition is detected, it collects the error information and
sends it and an analysis to the user. The tool requires a
graphics monitor for its output display.
Reliability, Availability, and Maintainability
The AlphaServer DS20E syste m achieves an unpara l leled level
of reliability and availability through the careful application of
technologies that ba l ance redundancy, e rror correction, and
fault management. Reliability and availability features are
built into the CPU, memory, and I/O, and implemented at the
system level.
Processor Features
• CPU data cache provides error correction code (ECC)
protection.
• Parity protection on CPU cache tag store.
• Multi-tiered power-up diagnostics to ve rify the
functionality of the hardware.
With two processors, w hen you power up or reset the system,
each CPU, in parallel, runs a set of diagnostic tests. If any
tests fail, the failing CPU is configured out of the system.
Responsibility for initializing memory and booting the console
firmware i s transferred to the other CPU, and the boot pr ocess
continues. This feature ensures that a system can still power
up and boot the operating syste m in case of a CPU failure.
LEDs on the control pa nel indicate test sta tus and component
failure information.
Memory Features
• The memory ECC sc heme is designed to provide
maximum protection for user data. The memory scheme
corrects single-bit errors and detects double-bit errors and
total DRAM failure. It also detects RAM address errors.
• Memory failove r. The power-up di agnostics are designed
to provide the largest amount of usable memory, config-
uring around errors.
I/O Features
• ECC protection on the switch interconnect and parity
protection on the PCI and SCSI buses.
• Extensive error correction built into disk drives.
• Optional internal RAID improves reliability and data
security.
• Disk hot swap.
Page 10
System Features
Auto reboot. On systems runni ng Tru64 UNIX or OpenVMS, a
firmware environment varia ble lets you set the def ault action
the system takes on power-up, reset, or after an operat i ng
system crash. For maximum system availability, the variable
can be set to cause the syste m to automatically r eboot the
operating system after most syste m failures.
Software installation. The operating systems are factory
installed. Factor y i nst alled software (FIS) allows you to boot
and use your system in a short er time than if you install the
software from a distribution kit.
Diagnostics. During the power-up process, diagnostics are run
to achieve several goals:
• Provide a robust hardware platform for the operating
system by ensuring that any faulty hardware does not
participate in the operating system session. This maximizes system uptime by reducing the risk of system
failure.
• Enable efficient, timely repair.
The system has a built-in firmwa re update utility (LFU) that
provides update capability for console and PCI I/O adapter
firmware. A fail-safe loader provides a means of reloading the
console in the event of corrupted firmware.
Thermal management. The air temperature and fan ope ration
are monitored to protect against overheating and possible
hardware destr uction. Two fans in the rear of the encl osure
cool the system box; if one system fan fails , the second one
speeds up to provide additional cooling. Also, each power
supply has two fans, and each processor has its own fan on the
chip heatsink. The system shuts down if a processor fan fails
or if the temperature reaches a threshold. The system fans are
hot swappable.
Error handling. Parity and othe r error conditions a re detected
on the PCI and ISA buses. The memory checki ng scheme
corrects single-bit errors and detects double-bit err ors.
Multiple ECC corrections to single-bit errors detected by the
operating systems help in determining where in the system the
error originated. Errors are logged for fai l ure analysis.
Disk hot swap. The hardw are is designed to enable hot swap
of disks. Hot swap is the removal of a disk or disks from any
of the storage compartments while the rest of the system
remains powered on and continues to operate. This feature
contributes significantly to system availability. Since many
disk problems can be fixed without shutting down the e ntire
system, users lose access only to the disks that are removed.
N+1 power redundancy A third pow er supply can be added to
provide redundant power to the system box.
An external UPS can be used to support critica l customer configurations. Because power is maintained for the entire system
(CPU, memory, and I/O), power interruptions are completely
transparent to users.
Installation and Maintenance
The systems are designed for easy hardwa re, software, and
option installation. Options ordered with a syste m are
preinstalled and tested at the factory. The operating systems
are also installed at the factory. Installation of the system is
relatively sim ple and may take only 30 m inutes.
Some maintenance tasks can be performed while the system is
running. Systems are designed so that system fans, power
supplies, and disks can be replaced without shutting down the
system.
Clustering
A cluster is a loosely coupled set of systems that behaves (is
addressed and manage d) like a single system, but provides
high levels of availability through redundant CPUs, storage,
and data paths. Cluster s are also highly scalabl e; that is, CPU,
I/O, storage, and application resources can be added inc rementally to efficiently increase capacity. For customers, this
translates to reliable access to system resources and data, and
investment protection of both hardware and software.
Clustering allows multiple computer systems to communicate
over a common interface, share disks, and spread the computing load across multiple CPUs.
PCI to Memory Channel Interconnect
Under Tru64 UNIX and OpenVMS, you can build high-availability clusters using the PCI to Memory Cha nne l interconnect.
The Memory Channe l interconnect is a high-bandwidth, lowlatency PCI-base d communications inte rconnect for up to ei ght
AlphaServer systems. Data written to one computer’s memory
is shared by other computers on the
The PCI CCMAB adapter is the interface between a PCI and a
Memory Channel bus. This bus is a memory- to-memory
computer system interconnect that permits I/O space writes in
one computing node to be r eplicated into the memories of a l l
other nodes on the Mem ory Channel bus. A write performed
by any CPU to its reflected address region results in automatic
hardware updates to memory regions in other nodes. One
node’s write is “reflected” to other nodes as a direct si de effect
of the local wri t e. This provides a m emory region with
properties similar to a high-performance shared memory
across a group of nodes.
Operating System Support
For clustered Tru64 UNIX systems, TruCluster Software
solutions allow users access to network services and provide
further failover recovery from server, network, or I/O failures.
Tru64 UNIX cluster systems use the SCSI bus and/or PCI to
Memory Channel interconnect bus between disks a nd systems.
OpenVMS cluster systems use the CI, SCSI, Ethernet, FDDI,
DSSI, and Memory Cha nnel as the interconnec t between disks
and systems.
Memory Channel bus.
Page 11
The primary m eans of clustering AlphaServer DS20E systems
depends on the operating system.
• Ethernet, OpenVMS
• CI clusters, OpenVMS only
• Memory Channel, Tru64 UNIX and OpenVMS
• SCSI clusters, Tru64 UNIX and OpenVMS
• DSSI clusters, OpenVMS only
Performance
Compaq has an ongoing program of performance engineering,
using industry-standard be nchmarks that allow comparisons
across major vendors’ systems. These benchmarks against
competitive systems are based on comparable CPU performance, coupled with comparable memory and disk expandability.
See Table 1 for the performance numbers of the AlphaServer
DS20E systems.
System performance, however, is highly dependent upon
application characteristics. Thus, benchmark inf ormation is
one helpful “data point” to be used in conjunction with other
purchase criteria such as features, service, and price.
Sources of Performance Information
Performance information is available on the Internet.
http://www.compaq.com/alphaserver/performance/index.html
http://www.ideasinternational.com/benchmark/spec/specfp_s2000.html
Information for Compaq Partners
If you are a Channel or Reseller Partner, you can find the tools,
resources, and information you need to conduct Compaq business
online on the secure Compaq Partner Network extranet site:
http://CPN.compaq.com
.
Also see the Compaq Solutions Alliance site at
http://csa.compaq.com
Service and Support
Compaq provides a compr ehensive set of services that
range from m igration, consulting, and training, to direct
support of Alpha systems, software, and appli cations. For
information on Compaq Services, point your Web browser to
http://www.compaq.com/services
Hardware Warranty
The AlphaServer DS20E system and components, including
CPU, memory, PCI controllers, and power supplies, have a
3-year on-site, 5-day per week, 9-hour per day hardware
warranty with ne xt-day response time .
StorageWorks component s are supported by the com prehensive StorageWorks war ranty: five years for disks, three year s
for controllers, two years for tape devices, and one year for
other components. T he first year inc ludes on-site next-day response time. Network products carry the network products
warranty.
Users can upgrade t o higher levels of service through a variety
of hardware supple mental services.
Software Warranty
The warranty for Tru64 UNIX and OpenVMS is conformance
to SPD with advisory tele phone support for a period of 90
days. Users can upgrade to higher levels of service through a
variety of softwa re supplemental services.
.
Page 12
Compaq AlphaServer DS20E System Diagrams
4
5
6
1. CPUs
2. System board
1
2
1
7
8
3. PCI slots
4. System features module
5. Control panel
6. Removable media bay
7. CD-ROM / floppy
diskette drive
3
8. Storage drive bays
9. Power supplies (2
minimum)
9
MR0300A
1
1. Parallel port
2. Serial port (COM2)
2
3. Serial port (COM1)
4. Keyboard port
5. Mouse port
3
6. AC power inlet
7. System fans
8. SCSI breakouts
9. PCI/ISA bulkhead ports
4
5
7
6
8
9
MR0301A
Page 13
System Features at a Glance
Table 1 provides a quick reference to features of Compaq AlphaServer DS20E systems.
Table 1 AlphaServer DS20E Features
CPU Features 67/667 68/833
Processor 1–2 Alpha 21264 chips 1–2 Alpha 21264A chips
CPU clock speed 667 MHz 833 MHz
Cache on chip
On-board cache 8 MB 8 MB
Upgradable in pedestal and cabinet CPU, memory, I/O, storage CPU, memory, I/O, storage
Memory (maximum)
Performance 1 CPU 2 CPUs 1 CPU 2 CPUs
SPECint2000 444 – 571 –
SPECfp2000 514 577 784 –
SPECweb99 685 1,050 – –
Standard Features
Internal Storage
Removable media CD-ROM, floppy diskette, one additional 5.25-inch removable media bay
Hard disks 218.4 GB (6 hot swap disks, 36.4 GB each)
I/O slots 6 PCI slots (5 PCI and 1 PCI/ISA)
Maximum PCI throughput Over 500 MB/sec with two 256 MB/sec buses
Availability Features
System System auto reboot, thermal management, remote system management, RAID 0, 1, 0+1, 5, hot swap of
OpenVMS clusters
Tru64 UNIX TruClusters Solutions
Operating Systems
Warranty
Hardware 3-year, on-site, 5 day x 9 hour warranty with 24-hour response
Software
64 KB I-cache
64 KB D-cache
64 KB I-cache
64 KB D-cache
4 GB
1.44 MB diskette drive, CD-ROM drive, 2 serial ports, 1 parallel port, keyboard and mouse, integrated
remote system management console, operating system license and customer documentation, Internet
software
disks, power supplies, and fans, memory fail over , ECC memory, ECC cache, N+1 power supply, SMP
CPU failover, error logging, optional uninterrupt ible power supply
CI, Ethernet, DSSI, SCSI, FDDI, PCI to Memory Channel Interconnect
SCSI, PCI to Memory Channel Interconnect
Tru64 UNIX, OpenVMS, Linux
90-day telephone advisory support for OpenVMS and Tru64 UNIX
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Physical Characteristics
Table 2 details basic physical characteristics of the system.
Table 2 AlphaServer DS20E Physical Characteristics
Dimensions Pedestal Rackmount
Height
Width
Depth
Weight
Environmental
Temperature Operating
Relative humidity Operating
Maximum wet bulb temperature Operating
Minimum dew point temperature Operating 2° C (36° F)
Maximum heat dissipation Nominal
Airflow Intake location
Altitude Operating
Vibration Operating 10–500 Hz .1 G peak
Mechanical shock Operating
Acoustics
Electrical (Power supplies are universal, PFC, auto ranging, 100/240 Vac)
47.0 cm (18.5 in.)
22.5 cm (8.85 in.)
69.9 cm (27.5 in.)
36 kg (80 lbs) typical;
40 kg (88 lbs) maximum
22.2 cm (8.75 in.)
44.5 cm (17.5 in.)
66.0 cm (26 in.)
36 kg (80 lbs) nominal; 39 kg (86 lbs) maximum
With brackets, slides, & cables
38 kg (84 lbs) nominal; 40 kg (88 lbs) maximum
Storage (60 days)
Rate of change
Nonoperating
Storage (60 days)
Rate of change
Storage (60 days)
Maximum
Exhaust location
Nonoperating
Pedestal
M-series cabinet
Idle
Operating
10−35° C (50−95° F)
-40−66° C (-40−151° F)
11° C/hr (20° F/hr)
20–80%
20–80%
10–95%
20%/hr
28° C (82° F)
46° C (115° F)
550 watts, 1,878 Btu/hr
780 watts, 2,664 Btu/hr
Front
Rear
3,037 m (10,000 ft)
12,192 m (40,000 ft)
7.5 G, 10+/–3ms
5.0 G, 10+/–3ms
Average Declared
wA
, B 44 LpAm, dba
5.8 L
wA
, B 49 LpAm, dba
6.3 L
Nominal voltage (Vac) 100 120 200–240
Voltage range (Vac)
90–100 110–128 180–250
temporary condition
Power source phase Single Single Single
Nominal frequency (Hz) 50/60 50/60 50/60
Frequency range (Hz) 49–51 / 59–61 49–51 / 59–61 49–51 / 59–61
RMS current (maximum steady state)
Pedestal and rackmount
Single power cord 6.6 A 5.5 A 3.0 A
Maximum VA 780 765 730
M-series cabinet (configuration dependent)
Nominal voltage (Vac) 100 120 220–240
Each power cord 24 A 24 A 16 A
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© 2001 Compaq Computer Corporation
Compaq, the Compaq logo, Compaq Insight Manager, AlphaServer,
StorageWorks, and TruCluster Registered in U.S. Patent and Trademark
Office. OpenVMS and Tru64 are trademarks of Compaq Information
Technologies Group, L.P. in the United States and other countries.
Linux is a registered trademark of Linus Torvalds in several countries.
UNIX is a trademark of The Open Group in the United States and other
countries. All other product names mentioned herein may be trademarks of
their respective companies.
Compaq shall not be liable for technical or editorial errors or omissions
contained herein. The information in this document is provided “as is”
without warranty of any kind and is subject to change without notice. The
warranties for Compaq products are set forth in the express limited warranty
statements accompanying such products. Nothing herein should be
construed as constituting an additional warranty.
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