Serverguard, Front
Serverguard, Back
Serverguard Functions
   PCMCIA Slot Use
Battery Pack
   Construction
Power Control Box
   Power Control Cable Pinout
   Power Control Box LED Status Indicators
0275xx Series Errors
POST/Config Errors with SG Installed
False 027564 Errors
ADF Sections

The ServerGuard Adapter is a standard IBM type-3 Micro Channel card size (3.475 inches X 11.500 inches).  The PC board contains 10 layers, three voltage, one ground, six signal planes.

J6, J7 and J9, J10
   Guessing big time here. Possibly both pairs are headers to connect to a system power switch and the System Board power connector on a 7546? 

DS1210 Nonvolatile Controller Chip
   By combining the DS1210 Nonvolatile Controller Chip with a CMOS memory and batteries, nonvolatile RAM operation can be achieved. Spec sheet HERE. 

3 Volt Battery
   The 3v CR2032 is used to maintain power to the NVRAM and the real time clock. Average battery life is estimated at 10 years. 

Temperature Sensors
   U1 and U13 provide input to the A-D converter for monitoring the internal temperature of the system. The two sensors are used to compute an average temperature within the system. 
   The sensors increase the output 10mV per degree F. The ADC represents each 10mV increment as one bit value and measures a temperature range from -26F to 230F. (Ed. Boiling water is only 212F!) 

Jumpers
   I see now why IBM is not an industry leader now. To quote "The Serverguard Adapter /A has two jumpers: a password-override jumper and a manufacturing jumper". 

Password Override Jumper
   The Password-override jumper is used to reset the administrative password in case the password is forgotten or the NVRAM area becomes corrupted (if the battery fails). 
   The administrative password protects functions such as changing passwords, changing power controls, setting error thresholds, and updating code in flash memory. 
   When the jumper is on pins 2-3, it is in the normal operating position. To override the admin password, jumper pins 1-2. Restore the jumper to 2-3 to protect the new password. 

Ed. Now what the hell? Which jumper is what? 

PT6101N 1 A, 12-Pin SIP Integrated Switching Regulator, +5 V data sheet

Power Indicator LEDs
When all LEDs are off, the adapter is in the sleep mode. 

CR1 When blinking (about once every 5 sec) adapter is working normally. 
CR2 State of Vcc power plane. When lit, the system power supply is On. 
CR3 State of Vbb power plane. When lit, power input for the Vbb power plane is present. 

U45 Time of Day Clock
   The adapter uses a real-time clock with a back-up battery as an alternate voltage source. This clock is used to maintain an independant time-of-day source, and it uses the alarm to schedule system power events. Whenever the system power or battery pack (7.2v) is off, the clock uses the back-up battery (3.0v) 
 

U44 Mystery
  Anyone with a component mounted on these solder pads? See POST Errors 

Vcc Power Plane
   This plane is powered by +5v dc from the system power supply and contains all of the system-interface logic on the adapter. If the system is powered on, the adapter is active. 
   Each time the system +5v goes below 2.5v, an internal interrupt (AD_INT3) is generated to alert the adapter microprocessor that power has been removed. 

Vbb Power Plane
   This is powered from a voltage regulator that receives it's input from the system +12v dc supply when the system is on. When the system is powered down, the Vbb Power Plane is powered from the 7.2v dc battery pack. 
   It provides the power for most of the computational logic on the adapter (microprocessor, memory, and ADC). When the battery is the power source, the Vbb voltage can be turned off with the power-kill bit; this bit has no effect when the system +12v is present. 
   When power to this plane is removed, the adapter is in sleep mode. The adapter is awakened by: 
       Incoming call to the modem 
       Power-override switch pressed on EPCB 
       Scheduled wake-up alarm from RTC 

Battery Voltage Plane (Vbat)
   Powered from a voltage regulator, which receives it's input from the system +12v supply when the system is on or from the 7.2v battery pack when the system is powered off. It contains the logic that controls the power-on state of the system power supply and the input for the Vbb power plane. 
   Logic on the Vbat plane is always active and cannot be turned off, as long as the 7.2v battery pack has power. 
   The functions on this power plane include the Shutdown, Power-Kill, Suicide, and Low-Power Enable registers, the LED and it's controls, the control logic for the Vbb power plane, and the voltage regulator for the Vbat power plane. 

Is it a PCMCIA Adapter?
  No! Slot A (upper) reserved for modem The modem is dedicated to ServerGuard and is not accessible by computer software. Slot B (lower) reserved 

Modem Specs
   It is a 2400bps, FDX modem with auto-dialing, auto-answering, and sleep mode features. In sleep mode, the modem responds to the ring-indicator signal. When the modem is called, it generates an interrupt to the adapter microprocessor. 

Slot B Mystery
   The tech ref never says Slot B is reserved. It has the same programming information as Slot A. Maybe the ADF can be hacked? 

Supported Systems
The IBM PS/2 ServerGuard Adapter is  supported in the following systems:7546-411/640/641, 8580, 8590, 8595, 9577, 9585, 9590 and 9595 

Operating System Requirements
     OS/2.0 with CSD or OS/2 2.1 or higher, NetFinity Manager for OS/2, NetFinity ServerGuard Services and IBM PS/2 ServerGuard Mass/2 Monitor 
 NetWare support for the ServerGuard will be available  for Versions 3.11, 3.12 and 4.0. 

Run from any System on Network
    ServerGuard and NetFinity for OS/2's features are available from the server system, or from any PC on the network.  Using IBM PS/2 ServerGuard MASS/2 Monitor from a remote ASYNC system, the LAN administrator can check and set alarm parameters, display server temperature, server voltages, and power condition.  Additionally the LAN administrator can power on/off or recycle power on the server. 

MESSAGES, STATISTICS AND LOGS
   Warning parameters for the system can be set with the ServerGuard option.  Once set, the system automatically sends warning alerts to users, dials out to remote pagers, or shuts down if operational limits such as temperature or voltages reach unacceptable limits. 
       ServerGuard information is displayed graphically, and more detail is available at the click of the mouse.  The ServerGuard option makes system operational statistics, such as CPU, memory, and 
disk capacity utilization, available in real time.  NetFinity for OS/2 displays a record of the last 10 seconds to 10 days (user selectable) for each statistic.  The statistics can be stored to disk for long-term storage and analyses. 
       ServerGuard records all critical events in a non-volatile (NVRAM) log, easily accessed for review.  Because the ServerGuard is battery-backed, the log can always be accessed even if the server is not operating. 

The ServerGuard allows reboot and power on/off control of the server system. 
LAN Access to configuration information 
     Server power control and system reset capabilities controlled automatically or by real-time commands 
     Alerts triggered by thresholds that can be preset by the user 
     The ability to direct alerts to pagers, LANs, remote or local systems 
     A battery backup designed to allow communications with the ServerGuard card during server power outages or when the administrator has powered the server down 
     Levels of security and password protection 
     Comprehensive error logging 
     Remote (LAN) console/remote ASYNC access capabilities 
     Remote (LAN) file transfer to and from the server 
     Remote (LAN) entry of operating system commands for execution 
     Compliance with emerging LAN management standards and protocols 

Serverguard Functions
 When the computer power goes down,  the IBM ServerGuard Adapter: 
           Continues running 
           Time-stamps and logs the error 
           Dials out through modem, LAN, or a local server port to alert a designated person of the failure 

Monitoring and Controlling Resources
           Internal computer  temperature 
           Computer voltages (+5V dc, +12V dc, -12V dc ) 
           Condition of the battery 
           Performance and errors for 
             -  Input and output devices 
             -  Operating system (for standalone computers ) 
             -  Network operating system ( for computers on a network ) 
            Computer power on and off 

Sleep Mode
   Must be such a thing. No idea right now. Looks to be a power saving state. 

Battery Pack Construction
  Six AA sized NiCad cells, No special size needed. 7.2v, 600mAH total. Individual cells are marked "Japan YA". To remove battery pack- squeeze both catches inward. Pull the pack up , pivoting on the hinges that are on the opposite side of the catches. 

(New battery need 24 hours to charge) 

  The External Power Control Box (EPCB) controls the ac input into the system power supply. A cable provides a control path from the ServerGuard to the EPCB. The system power cord is plugged into the EPCB, and the EPCB is plugged into an ac source.. The ServerGuard then controls the system power by signalling the EPCB to turn power to the system on or off. 
   The EPCB has a power override swith. When the switch is closed (on), ac power os provided to the system regardless of the ServerGuard controls to the EPCB. When the switch is open, the power to the system is determined by signals from the ServerGuard. 
   The EPCB has two LEDs. The power-status LED reflects the state of LED1 on the ServerGuard, and the cable-attached LED shows if the control cable from the ServerGuard is connected correctly. 

IBM PS/2 ServerGuard Features

EPCB Connector
   The cable from the EPCB to the adapter is a shielded cable that connects digital ground on the adapter to digital ground on the EPCB board. 
OVRIDE Pin 1 The Override-status signal is an output to the adapter that indicates the state of the power-override switch. A high level indicates the switch is open, low indicates closed. 
EXTPWR Pin 2 The external-power signal is an output to the adapter and is used to recharge the 7.2v battery pack. 
SHUTEN Pin 3 The Shutdown-enable signal is an output to the adapter and is grounded in the EPCB. 
DCON Pin 4 This signal is an input from the adapter that is used with  EPCB_CLK to control the power-up and power-down state of the system. When SHUTEN is low, this signal is controlled by the shutdown bit. 
LEDON Pin 5 This signal is an input from the adapter that controls the power-status LED on the EPCB. It is controlled through the Adapter Control Register 1. 
CARD_DETECT Pin 6 This signal is an output to the adapter that indicates whether the EPCB is connected correctly. It is pulled low by the EPCB. The state of this signal is indicated in the EPCB-status bit. 
GOOD_CABLE Pin 7 This signal is an input from the adapter that controlls the cable-attached LED on the EPCB. It is lit when the signal is low. 
EPCB_CLK Pin 8 This signal is an input from the adapter that clocks the data on DCON. The data is transferred on the rising edge. It is controlled by the EPCB Control register. 

My Power Cord was Bobbitted!
  If someone sliced off your power cord, it uses an 8 pin mini-DIN plug to a 10 position header. Cable is PN 61G2145.  It isn't a PS/2 plug, though it looks like it without a center polarizing rib. Looks like a Mac Local Talk plug...

Note- My 10 pin header numbering is off. I do know that the "N" is correct. N is pin 7. 

Power Control Box LED Indicator Status

POST or configuration errors with ServerGuard installed
    The ServerGuard Adapter causes 66 errors (configuration) during POST or isn't  recognized in Configuration. This exposure is limited to POST. 
   Once the ServerGuard adapter has successfully completed POST, it will function normally, without further exposure to the problem until the system is once again powered on (POST is run again). 
   Problem Isolation Aids Inspect the ServerGuard card for a component (chip) at location U44. If this module is missing, the adapter is NOT exposed to this problem. The location of U44 is printed on the card, but the lettering is very small. Refer to the following diagram for the location of U44: 
   Backside of the ServerGuard Adapter 

Fix This problem is being corrected in current production. A new version of  the ServerGuard adapter is available under FRU P/N06H8091. 

Ed. My SG doesn't match the FRU or PN. The two chips to the right of U44 (above) look to be EPROM, while my SG has flash. I do have a U44 close to that location, but I will have to install the SG to confirm my hunch. 

View Configuration Symptoms
   The chip (U44) caused numerous problems, but the most obvious symptom is trashed configuration and setup.  If you look at the MEMORY section of your VIEW CONFIGURATION section, are there musical notes insted of a number?  This is a dead giveaway to a bad SG card. 

Error Code 027564 may be False
   If error code 027564 is displayed (12 Volts from the power supply is bad).when running the serverguard adapter diagnostics, but no system failures reported and no other diagnostic failures are experienced, then it is a false error. No hardware or software needs to be replaced. 

PS/2/Server - 166 POST Error With IBM ServerGuard Adapter 

Symptom:
During POST (Power-On System Test) a 166 error is received indicating the installed ServerGuard Adapter is "busy."

Problem Isolation Aids:
ALL PS/2 Servers with the serverguard adapter, FRU P/N06H8091, installed may be affected.

Fix:
Do not replace the ServerGuard Adapter. This error may be caused by either inserting or removing the modem from the PCMCIA socket, or connecting/ disconnecting the battery-pack to the adapter while system power is on.

To Correct the Problem:
1. Power off the system, then remove the adapter.
2. Make sure the battery-pack is fully charged.
3. Disconnect the battery-pack from the adapter for a few seconds.
4. Reconnect the battery-pack, and make sure the 3 LED's, located on top of the PCMCIA modem socket, follow this
sequence:
- CR3 comes on first.
- Seconds later, CR2 blinks 5 TIMES in a 5 second time interval, then stays on for a few seconds and goes off.
- Seconds later, CR3 goes off.
- CR1 remains off the whole time.

I/O Address Range
  Allows you to choose a unique I/O address range which is used by operating systems to communicate with this adapter 
    <8000-800F>, 8400-840F, 8800-880F, 8C00-8C0F, 9000-900F, 9400-940F, 9800-980F, 9C00-9C0F 

DMA Arbitration Level
   Allows you to select the DMA channel the adapter will use to transfer data. 
          <Arb 9>, Arb 8, Arb 7,Arb 6, Arb 5, Arb 4, Arb 3, Arb 2, Arb 1, Arb 0, Arb E,Arb D, Arb C, Arb B, Arb A 

Interrupt Level
         Allows you to set the interrupt level for the adapter. Ed. IRQ 14 will give 95 the sh*ts... 
   <IRQ 5>, IRQ 14 

Fairness
      If On, the adapter will release control of the Micro Channel as soon as another Micro Channel adapter preempts or requests the bus.  If Off, the adapter will continue to hold the bus until the entire transfer has been completed. 
   <On>, Off 

Adapter Serial Port Emulation
      This is commented out. If you want to enable this option, remove the ";" at the front of each line. 
   Serial port emulation is used to make this adapter look like a SERIAL 1 port to the system.  This allows the modem port on this adapter to be used for remote diagnostics in addition to the normal modem functions that would be performed by this adapter. 
   When this function is enabled, SERIAL 1 should NOT be used as a general purpose serial port.  If remote diagnostics is not going to be used, this function should be <Disabled>. 
     <SERIAL 1>  IO 03F8h-03FFh Int 4, Disabled 

PCMCIA Slot A
      This item is not changeable. This adapter requires a Modem card inserted into PCMCIA Slot A in order to operate. Do not remove the Modem PCMCIA card in Slot A.Modem card 
     Modem card 

PCMCIA Slot B
         This item is not supported at this time. Currently, this adapter does not support the insertion of a PCMCIA card into slot B. If the support becomes available in the future, a flash update to the 
adapter's firmware will be required and will be separately purchaseable. 
     Unavailable