Acer Altos R510 SeriesUser’s Guide
6 Troubleshooting 143Resetting the System 145Problems following Initial System Installation 145First Steps Checklist 145Hardware Diagnostic Testing 14
4 Configuring the system88The minimum memory configuration is one DIMM, installed in DIMM socket 1B (the socket farthest from the processors). Howeve
89Memory SparingTo provide a more fault tolerant system, the Altos R510 includes specialized hardware to support fail-over to a spare DIMM device in t
4 Configuring the system90Installing and Removing MemoryThe silkscreen on the board for the DIMMs displays DIMM1B, DIMM1A, DIMM2B, DIMM2A, DIMM3B, an
916 Make sure the clips at either end of the DIMM socket(s) are pushed outward to the open position.7 Holding the DIMM by the edges, remove it from it
4 Configuring the system92
5 BIOS setup
This chapter explains the system BIOS and discusses how to configure the system by changing the BIOS settings.
95Using the BIOS Setup UtilityThis section describes the BIOS Setup Utility options, which is used to change server configuration defaults. You can ru
5 BIOS setup96BIOS Setup UtilityThe BIOS Setup utility is provided to perform system configuration changes and to display current settings and enviro
97BIOS Setup Keyboard Command Bar OptionsPress Description<F1> Help - Pressing F1 on any menu invokes the general Help window.← →The left and r
Required Installation Position of the CMA 170Installing the CMA on the Slide Rails 171Placing and Securing Cabling Within the CMA 172General Safety In
5 BIOS setup98<Esc> Exit - The ESC key provides a mechanism for backing out of any field. This key will undo the pressing of the Enter key. W
99 MainThe first screen displayed when entering the BIOS Setup Utility is the Main Menu selection screen. This screen displays the major menu selectio
5 BIOS setup100Type N/A N/A Processor brand ID stringSpeed N/A N/A Calculated proces-sor speedCount N/A N/A Detected number of physical proces-sorsSy
101AdvancedThe Advanced menu contains parameter values that define how the system behaves on startup.Be cautious in setting parameter values in the Ad
5 BIOS setup102Processor Configuration Sub-menu Options IDE Configura-tionN/A Configure the IDE device(s).Selects submenu.Floppy Config-urationN/
103Manufac-turerIntel N/A Displays processor man-ufacturer stringBrand String N/A N/A Displays processor brand ID stringFrequency N/A N/A Displays the
5 BIOS setup104Max CPUID Value LimitDisabledEnabledThis should be enabled in order to boot legacy OSes that cannot support pro-cessors with extended
105BIOS Setup IDE Configuration Menu Options Feature Options Help Text DescriptionIDE ConfigurationOnboard P-ATA Chan-nelsDisabledPrimarySecond-ar
5 BIOS setup106Onboard S-ATA Chan-nelsDisabledEnabledDisabled: disables the integrated S-ATA Con-troller.Enabled: enables the integrated S-ATA Con-tr
107Secondary IDE SlaveN/A While entering setup, BIOS auto detects the presence of IDE devices. This displays the status of auto detection of IDE devic
5 BIOS setup108Mixed P-ATA-S-ATA Configuration with only Primary P-ATA Feature Options Help Text DescriptionMixed P-ATA / S-ATAFirst ATA ChannelP
109IDE Device Configuration Sub-menu Selections Feature Options Help Text DescriptionPrimary/Secondary/Third/Fourth IDE Master/SlaveDevice N/A N/A
5 BIOS setup110Block (Multi-Sector Transfer) ModeDisabledAutoDisabled: The Data transfer from and to the device occurs one sector at a time. Auto:
111Floppy Configuration Sub-menu Selections Feature Options Help Text DescriptionFloppy ConfigurationFloppy A Disabled720 KB 3 1/2"1.44 MB 3
5 BIOS setup112Super I/O Configuration Sub-menu Feature Options Help Text DescriptionConfigure Nat42x Super IO ChipsetSerial Port A AddressDisabl
113USB Configuration Sub-menu Feature Options Help Text DescriptionUSB ConfigurationUSB Devices EnabledN/A N/A List of USB devices detected by BIO
5 BIOS setup114Legacy USB SupportDisabledKeyboard onlyAutoKeyboard and MouseEnables support for legacy USB. AUTO option dis-ables legacy support if n
115PCI Configuration This sub-menu provides control over PCI devices and their option ROMs. If the BIOS is reporting POST error 146, use this men
5 BIOS setup116Memory Configuration Sub-menu Selections Onboard NIC 2 (Right)DisabledEnabledOnboard NIC 2 ROMDisabledEnabledSlot 1 Option ROMDisable
117 This sub-menu provides information about the DIMMs detected by the BIOS. The DIMM number is printed on the baseboard next to each device. Feature
1 System information
5 BIOS setup118DIMM 3B InstalledNot InstalledDisabled MirrorSpareInformational display. Extended Memory Test1 MB1 KBEvery LocationDisabledSettings fo
119Boot Menu Selections Feature Option Help Text DescriptionBoot SettingsBoot Settings ConfigurationN/A Configure settings during system boot.S
5 BIOS setup120Boot Settings Configuration Sub-menu Selections Feature Options Help TextBoot Settings ConfigurationQuick Boot DisabledEnabledAl
121Boot Device Priority Sub-menu Selections POST Error Pause DisabledEnabledIf enabled, the system will wait for user intervention on critical POS
5 BIOS setup122Hard Disk Drive Sub-Menu Selections 1st Boot DeviceVaries Specifies the boot sequence from the avail-able devices.A device enclose
123Removable Drives Sub-menu Selections 1st Drive Varies Specifies the boot sequence from the avail-able devices.Varies based on system configu-ra
5 BIOS setup124ATAPI CD-ROM Drives Sub-menu Selections nth Drive Varies Specifies the boot sequence from the avail-able devices.Varies based on s
125Security Menu Options nth Drive Varies Specifies the boot sequence from the avail-able devices.Varies based on system configu-ration.Feature Op
5 BIOS setup126Set Admin PasswordN/A Set or clear Admin pass-wordPressing enter twice will clear the password. This option is grayed our when enterin
127Password On BootDisabledEnabledIf enabled, requires pass-word entry before boot.This node is grayed out if a user password is not installed.Secure
The Acer Altos R510 is a rack optimised dual processor system loaded with features. The system uses next generation technology to offer excellent perf
5 BIOS setup128Server Menu Selections NMI Control DisabledEnabledEnable / disable NMI con-trol for the front panel NMI button.Feature Options Hel
129Assert NMI on SERRDisabledEnabledIf enabled, NMI is gener-ated on SERR and logged.Assert NMI on PERRDisabledEnabledIf enabled, NMI is gener-ated. S
5 BIOS setup130PXE OS Boot TimeoutDisabled5 minutes10 minutes15 minutes20 minutesThis controls the time limit allowed for booting an operating system
131System Management Sub-menu Selections Feature OptionsHelp TextDescriptionServer Board Part NumberN/A N/A Field contents variesServer Board Seri
5 BIOS setup132Chassis Part NumberN/A N/A Field contents variesChassis Serial NumberN/A N/A Field contents variesBIOS Version N/A N/A BIOS ID string
133Serial Console Features Sub-menu Selections Feature Options Help Text DescriptionSerial Console FeaturesBIOS Redi-rection PortDisabledSerial A
5 BIOS setup134Baud Rate 960019.2K38.4K57.6K115.2KN/AFlow Con-trolNo Flow ControlCTS/RTSXON/XOFFCTS/RTS + CDIf enabled, it will use the Flow control
135Event Log Configuration Sub-menu Selections Feature Options Help Text DescriptionEvent Log ConfigurationClear All Event LogsDisabledEnabledSett
5 BIOS setup136Critical Event Log-gingDisabledEnabledIf enabled, BIOS will detect and log events for system critical errors. Criti-cal errors are fat
137Exit Menu Selections Feature Options Help Text DescriptionExit Options Exit OptionsSave Changes and ExitN/A Exit system setup after saving the
3Product briefingThis section provides basic information concerning the configuration of your Altos R510 system.Processor• Single or dual Intel® XeonT
5 BIOS setup138Upgrading the BIOSThe upgrade utility allows you to upgrade the BIOS in flash memory. The code and data in the upgrade file include th
1392 Write down the current settings in the BIOS Setup program.Note: Do not skip step 2. You will need these settings to configure your computer at th
5 BIOS setup1403 Move the jumper from the normal operation position, Password Clear Protect, at pins 2 and 3 to the Password Clear Erase position, co
1411 Power down the system and disconnect the AC power.2 Open the server.3 Move the jumper from the normal operation position, CMOS Clear by BMC, at p
5 BIOS setup142
6 Troubleshooting
This chapter helps you identify and solve problems that might occur while you are using the system.
145TroubleshootingFor any issue, first ensure you are using the latest firmware and files. Firmware upgrades include updates for BIOS, the baseboard m
6 Troubleshooting146• Are all cables correctly connected and secured?• Are the processors fully seated in their sockets on the server board?• Are all
1472 Make sure the system power cord is plugged into a properly grounded AC outlet.3 Make sure your video display monitor and keyboard are correctly c
1 System information4Warning! Functionality issues may be encountered if mixed memory types are installed on the same server board. DIMM modules of i
6 Troubleshooting148• System cooling fans do not rotate.• Diskette drive activity light does not light.• Hard disk drive activity light does not ligh
149box, is it switched to the correct system?• Are the brightness and contrast controls on the video monitor properly adjusted?• Is the video monitor
6 Troubleshooting150System Cooling Fans Do Not Rotate ProperlyIf the system cooling fans are not operating properly, it is an indication of possible
151• Is the drive properly configured?Cannot Connect to a Server• Make sure the network cable is securely attached to the correct connector at the sys
6 Troubleshooting152System Boots when Installing PCI CardSystem Server Management features require full-time “standby” power. This means some parts
153• Check your system for a virus infection.• Uninstall and reinstall the software. Make sure all necessary files are installed.• If the problems ar
6 Troubleshooting154Bootable CD-ROM Is Not DetectedCheck the following:• Make sure the BIOS are configured to allow the CD-ROM to be the first bootab
155CPU 1 & 2 Fan FaultIdentify fan failureFront cen-ter boardAmber On = FaultCPU 1 & 2 FaultIdentify pro-cessor failure1” behind processor soc
6 Troubleshooting156
Appendix A: Management software installation
5Serial ATA ports• Two SATA portsService ID• Front service ID button• Front and rear service ID LEDOperating Systems supported• Microsoft® Windows® Se
This appendix shows you how to install the ASM software packages.
159Installing ASMAcer Server Manager (ASM) consists of the ASM Console and the ASM Agent. These two components are both required to perform server ma
Appendix A: Management software installation1602 Insert the EasyBUILDTM Management CD into the server’s CD-ROM drive. The installation sequence will
161To install the ASM6 Agent on RedHat Linux 9.01 Insert the ASM6 installation CD into your computer's optical drive.2 Mount the CD-ROM drive wit
Appendix A: Management software installation162
Appendix B: Tool-less rail kit installation
This appendix shows you how to use the optional rail kit to put your Altos R510 server into a server rack.
165Tool-less rail kit installationNote: Read the General Safety Information on the other side of this sheet before attempting installation.The Slide R
Appendix B: Tool-less rail kit installation166The Multi-Pin Adapters allow the Slide Rails to be used in racks that have square mounting holes or rou
167typically identified by a mark or hole. Caution! If Slide Rail is mounted in holes which are not vertically aligned from front to back, the Slide R
1 System information6Product specification summaryHighlighted below are the system’s key features:• Single or dual Intel® XeonTM processor supporting
Appendix B: Tool-less rail kit installation1684.Making certain the proper mounting holes on rack upright are selected, repeat the above step at the S
169fully engaged in the mounting channels. Ensure that the Component Release Levers are in locked position.4.Press and hold the left and right Slide E
Appendix B: Tool-less rail kit installation170mounting position with the Slide Rail track. An overall view of the CMA and its details are shown below
171Installing the CMA on the Slide Rails1.Pull the Slide Rails out to the fully extended (locked) position.2.Loosely position the CMA in mounting posi
Appendix B: Tool-less rail kit installation172thumbscrew.6.Press and hold the left and right Slide Extension Release Levers and slowly move the Slide
1735.Press and hold the left and right Slide Extension Release Levers and slowly slide the component throughout its entire range of motion to ensure t
Appendix B: Tool-less rail kit installation174• If component being installed into Slide Rails exceeds 22.6 kg (50 lb.), two persons should lift the c
Appendix C: Sensor Table
This appendix shows you the Altos R510 sensor table details.
177Sensor TableSensor Name Sensor # Sensor TypePhysical Security Violation 0Ah Physical SecurityCPU1 12v 0Bh VoltageCPU2 12v 0Ch VoltageBB +1.5V 0Dh V
2 System tour
Appendix C: Sensor Table178Tach Fan 6 20h Fan Tach Fan 7 21h Fan Tach Fan 8 22h Fan Tach Fan 9 23h Fan Proc1 IERR 24h ProcessorProc2 IERR 25h Process
Appendix D: SATA RAID Configuration
This appendix shows you how to create SATA RAID.
181Configuring the onboard SATA RAIDThis section briefly shows how to create RAID 1 (mirror) volume with onboard SATA RAID function.How to enable the
Appendix D: SATA RAID Configuration1824 Select Factory Default and YES to load the default settings.5 Exit the configuration utility and press <Ct
183Saving and Exiting the Embedded RAID Configuration Utility1 When RAID configuration and initialization is complete, press <Esc> in the Manage
Appendix D: SATA RAID Configuration184
185IndexAAcer Server Manager (ASM) 159system requirements 159ASM Agent 159ASM Console 159system setup 159install ASM Agent 159instal
186
Changes may be made periodically to the information in this publication without obligation to notify any person of such revision or changes. Such cha
This chapter provides locations of various components and ports and instructions on how to set up the system.
9System boardConnector and Header LocationsThe mainboard of the R510 becomes accessible once you open the system. The figure below is provided to help
2 System tour10G DIMM sockets (DIMM 1B, 1A, 2B, 2A, 3B, and 3A)H Processor 1 fan headerI Processor 1 socketJ Processor 2 socketK Processor 2 fan head
11Configuration JumpersJumper NamePins What happens at system reset??J1H2 Password Clear1-2 If these pins are jumpered, administrator and user passwor
2 System tour12Serial Port Configuration JumperJ15H CMOS Clear1-2 If these pins are jumpered, the CMOS settings will be cleared on the next reset. T
13BIOS Select JumperPins What happens at system reset??1-2 System is configured for normal operation 2-3Force BIOS to lower bankJ1A43BIOS Select1-2: N
2 System tour14Back Panel ConnectorsItem DescriptionA PS/2 Mouse portB PS/2 Keyboard portC Com Port (RJ-45 connector)D Gigabit LAN # 1 Port (RJ45)E
15The NIC LEDs at the right and left of each NIC provide the following information.LED ColorLED State DescriptionLeft LEDOff No network connectionLeft
2 System tour16External and internal structureFront view (with bezel)Front view (w/o bezel) No. DescriptionA Name PlaneBLEDs No. DescriptionA Slimlin
17Front panel Front Panel LED and Buttons descriptionItem DescriptionA LAN #2 Activity LEDB LAN #1 Activity LEDC Power buttonDPower LEDE Hard Drive Ac
iiiNoticesFCC noticeClass A devices do not have an FCC logo or FCC IDE on the label. Class B devices have an FCC logo or FCC IDE on the label. Once
2 System tour18Control Button FunctionsLED Indicator StatusItem DescriptionPower/Sleep buttonToggles the system power on/off. Sleep button for ACPI-
19Note: If the system is powered down without going through the BIOS, the LED state that was in effect at the time of the power-down is restored when
2 System tour20Rear viewItem DescriptionA PS2 Mouse PortB Low profile PCI card bracketC Full height PCI card bracketD AC Power receptacleE PS2 keyboa
21Optional Peripherals Item DescriptionA Slim-line Device cage, support for FDD / DVD / CD-ROM driveB Hard Drive Bays (3)AB
2 System tour22Internal components Item DescriptionA Slimline drive bayB Backplane (optional)C Power supply air baffleD Power supplyE PCI add-in car
3 Getting Started
This chapter gives information on setting up and starting to use your system
25Setting up the systemPreinstallation requirementsSelecting a siteBefore unpacking and installing the system, select a suitable site for the system f
3 Getting Started26System startupTurning on the systemAfter making sure that you have properly set up the system and connected all the required cable
27Power-on problemsIf the system does not boot after you have applied power, check the following factors that might have caused the boot failure.• The
ivPeripheral devicesOnly peripherals (input/output devices, terminals, printers, etc.) certified to comply with the Class A or Class B limits may be a
3 Getting Started28
4 Configuring the system
This chapter discusses the precautionary measures and installation procedures you need to know when upgrading the system.
31Upgrading the systemCertain components of the Altos R510 are upgradeable such as the drives, the CPU, the memory, and the expansion cards. However,
4 Configuring the system324 Follow the ESD precautions described in this section when handling a server component.5 Remove any expansion board(s) or
33Opening the serverCaution! Before you proceed, make sure that you have turned off your system and all peripherals connected to it. Read the “Preinst
4 Configuring the system345 While holding the blue button (B) at the top of the chassis in, slide the top cover back until it stops (C). 6 Lift the
35Installing the Chassis Cover1 Place the cover over the chassis so that the side edges of the cover sit just inside the chassis sidewalls. 2 Slide th
4 Configuring the system36Removing and Installing the Front BezelRemoving the Front BezelUse the steps below to remove the front bezel. 1 Pull the be
37Removing and Installing the Processor Air DuctAlways operate your Altos R510’s chassis with the processor air duct in place. The air duct is require
vImportant safety instructionsRead these instructions carefully. Save these instructions for future reference.1 Follow all warnings and instructions
4 Configuring the system38the power supply. Use caution not to pinch or disengate cables that may be near or under the air duct. Removing and Install
395 Pull up on the air baffle to remove it. See the figure below. You may need to remove or hold cables out of the way. TP0131
4 Configuring the system40Installing the Air Baffle1 Lower the baffle into the chassis between the power supply and the drive bay area, to the left o
41Installing and Removing a Hard Disk DriveUp to three hard drives of one of the following types can be installed, depending on the hard drive install
4 Configuring the system426 Remove the four screws that attach the plastic retention device or the previously installed hard drive to the drive carri
439 Insert the drive into the bay until it clicks into place.10 If it is not already installed, connect the SATA power cable adapter to the 3x2 power
4 Configuring the system4411 For each drive you install, route one SATA data cable from the server board or add-in card to the hard drive, with the r
4515 See letter “B” in the figure below and the arrow that leads from this letter to the component in the chassis. This component is the air baffle th
4 Configuring the system4618 (Optional) Install the front bezel. For instructions, see “Removing and Installing the Front Bezel.”19 Install the chass
471 Observe the safety and ESD precautions at the beginning of this book. See “Safety Information.”2 Power down the server and unplug all peripheral d
via When the power cord or plug is damaged or frayedb If liquid has been spilled into the productc If the product has been exposed to rain or waterd I
4 Configuring the system48Installing a SATA or SCSI Hot-swap Hard Disk DriveUse these instructions only if you have installed the SATA or SCSI backpl
495 Remove the hard drive from its wrapper and place it on an antistatic surface.6 Set any jumpers and/or switches on the drive according to the drive
4 Configuring the system508 Align the holes in the drive to the holes in the drive carrier and attach it to the carrier with the screws that were att
511 Remove the front bezel if it is installed. For instructions, see “Removing and Installing the Front Bezel.”2 Press in on the green latch at the fr
4 Configuring the system52Installing or Removing a Floppy DriveFloppy drives are installed in different ways, depending on the following items:1 The
532 Power down the server and unplug all peripheral devices and the AC power cable. 3 Remove the chassis cover. For instructions, see “Removing the Ch
4 Configuring the system5410 Slide the floppy drive assembly into the slimeline bay of the chassis until it clicks into place. See letter “A” in the
55Removing a Floppy Drive from the Slimline Bay (Backplane Installed)1 Observe the safety and ESD precautions at the beginning of this book. See “Safe
4 Configuring the system56drive power adapter cable used in these instructions was sent to you with your fixed drive kit.1 Observe the safety and ESD
579 Push down on the connector cover to lock the cable into place. See letter “C” in the figure below.10 Open the connector on the interposer board by
Notices iiiFCC notice iiiClass A equipment iiiShielded cables iiiPeripheral devices ivUse conditions ivCanadian users ivLaser compliance statement ivI
4 Configuring the system5815 Slide the floppy drive assembly into the chassis until it clicks into place. See letter “A” in the figure below.16 Conne
592021 Install the chassis cover. For instructions, see “Installing the Chassis Cover.” 22 (Optional) Install the front bezel. For instructions, see “
4 Configuring the system60Removing a Floppy Drive from the Slimline Bay (No Backplane Installed)1 Observe the safety and ESD precautions at the begin
61Installing a Floppy Drive into the Converted Hard Drive Bay (Backplane Installed)The slimline floppy drive conversion kit can only be installed into
4 Configuring the system629 Attach the floppy drive to the carrier with the screws that came with your floppy drive conversion kit. One screw attache
63 11 Open the connector on the rear of the floppy drive by pulling up on the connector cover. 12 Insert one end of the flat flex cable end into the f
4 Configuring the system6418 Install the chassis cover. For instructions, see “Installing the Chassis Cover” 19 (Optional) Install the front bezel. F
655 Open the connector labeled “Floppy Con” on the backplane by pulling up on the connector cover. Remove the flat flex cable from the backplane. 6 Pu
4 Configuring the system66Installing or Removing a DVD/CD-RW or CD-ROM DriveCAUTION: DVD/CD-RW and CD-ROM drives are NOT hot swappable. Before removi
678 Use the two screws indicated in the figure to attach the interposer board to the DVD/CD-RW or CD-ROM drive. See letters “C” and “D” in the figure.
Selecting a site 25Checking the package contents 25System startup 26Turning on the system 26Turning off the system 26Power-on problems 274 Configuring
4 Configuring the system6812 Install the chassis cover. For instructions, see “Installing the Chassis Cover.” 13 (Optional) Install the front bezel.
698 Disconnect the data cable from the rear of the DVD/CD-RW or CD-ROM drive.9 Remove the two screws at the rear of the DVD/CD-RW or CD-ROM drive to d
4 Configuring the system706 Align the two holes at left edge of DVD/CD-RW or CD-ROM drive with the cutouts in drive carrier. See letter “A” in the fi
7114 Install the chassis cover. For instructions, see “Installing the Chassis Cover.” 15 (Optional) Install the front bezel. For instructions, see “Re
4 Configuring the system72Installing and Removing a PCI Riser ConnectorCAUTION: PCI riser connectors are NOT hot swappable. Before removing or replac
736 Line up the screws on the riser assembly with the slot and the large hole on the riser connector. 7 Press and hold the blue riser locking lever. S
4 Configuring the system7414 Install the chassis cover. For instructions, see “Installing the Chassis Cover.” 15 Plug all peripheral devices and the
754 Lift up on the two blue levers to lift the PCI riser assembly from the chassis.5 Remove any PCI add-in cards that are installed in the connector.
4 Configuring the system76Installing and Removing a PCI Add-in CardInstalling a PCI Add-in CardIn the slots provided by the PCI riser connector, you
778 Insert the add-in card until it seats in riser card connector. Make sure the bracket inserts into the matching slot. See letter “C”.9 Close the re
Installing a DVD/CD-RW or CD-ROM Drive into Slimline Bay (Back-plane Installed) 66Removing a DVD/CD-RW or CD-ROM Drive from the Slimline Bay (Backplan
4 Configuring the system787 Remove the add-in card 8 Close the retention clip. 9 Position the riser assembly over the PCI sockets on the server board
79Installing and Removing the SATA or SCSI Backplane (Optional)You received your server chassis with your choice of one of drive installation options:
4 Configuring the system808 Slide the board to the right until it stops. Do not pull on any components on the board – grasp only on the edges of the
815 Remove all hot-swap drive carriers. For instructions, see “Removing a SATA or SCSI Hot-swap Hard Disk Drive.”6 Set the backplane board in place so
4 Configuring the system82• Floppy drive cable, if applicable• CD-ROM drive cable, if applicable10 Install the air baffle. For instructions, see “Ins
83Processor Installation and UpgradeInstalling or Replacing the ProcessorCAUTIONProcessor must be appropriate: You may damage the server board if you
4 Configuring the system84NOTE: Make sure the alignment triangle mark and the alignment triangle cutout align correctly. 7 Lower the socket lever co
85 Installing the Heat Sink(s)1 The heat sink has Thermal Interface Material (TIM) located on the bottom of it. Use caution when you unpack the heat s
4 Configuring the system86Removing a Processor1 Observe the safety and ESD precautions at the beginning of this book.2 Turn off all peripheral device
87Memory Installations and UpgradeUpgrading the system memoryThis section includes instructions for removing and installing a memory module. The Alto
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