Resetting the System

There are two general types of resets for the HP 3000 (Series 900): a soft reset and a hard reset.

Soft Reset

A soft reset, the type of reset used most often, preserves the current processor state. This type of reset performs a nondisruptive memory test and terminates all I/O operations before executing recovery software for starting the boot device and console selection process. A soft reset can also occur during a software reboot at the completion of a bootable ISL utility, such as INSTALL, UPDATE, or DUMP.

More information on issuing resets from the console is provided later in this chapter.

Hard Reset

A hard reset is disruptive. It initiates the processor self-test that resets memory and terminates all I/O operations. A hard reset is necessary after a hardware failure or after an error from which the system cannot recover.

A hard reset is initiated when the CPU is powered on. If the system is powered on already, then entering the reset command, RS, at the system console initiates the hard reset process.

More information on issuing resets from the console is provided later in this chapter.

Resetting the System Using the Console

With the release of the A and N-class systems, MPE supports two different types of access into the system service ports. For NIO based systems, the console interfaces with the 900 Series HP 3000 through the access port (AP) located in the channel I/O (CIO) section of the system card cage. For A and N-class systems, the Guardian Service Processor (GSP) provides access through the core I/O card.

In addition to providing other features and commands, both the GSP and the AP allow the system manager or system operator (OP capability) to issue hard or soft resets from the console keyboard instead of using the front panel reset switch. (The system is secured from anyone accidentally entering an GSP/AP command. It responds to GSP/AP commands only when the console is placed in control mode by entering CTRL B.)

The access port supports two, two-character commands for resetting the system, as described in Table 2-1 “AP Reset Commands”.

Table 2-1 AP Reset Commands

Command	Description
RS	Reset SPU (hard reset). This command initiates a processor self-test that resets memory and terminates all I/O operations. Do not use this type of reset in preparation for a dump.
TC	Transfer of control (soft reset). This command initiates a reset that preserves the current processor state, terminates all I/O operations, and performs a nondisruptive memory test.

For NIO systems, refer to Appendix A for details about using the AP support interface for functions other than resetting the system. For A and N class systems, refer to Appendix H for details about using the GSP support interface for functions other that resetting the system.

To reset the system using the access port (AP), or Guardian Service Processor (GSP), follow the directions listed below:

Place the console in control mode by entering CTRL B at the system prompt.
The console responds by displaying the control mode prompt (CM>) and activating the system status line at the bottom of the screen:
CM> . . . Code: F1FF REMOTE: disabled inactive multiple ACCESS FAULT:00
For A and N-class systems, the console responds by displaying the GSP mode prompt (GSP>) along with a status message.

Leaving Console Mode - you may lose write access.
When Console Mode returns, type ^Ecf to get console write access.

GSP Host Name: <GSP host name>

GSP>
Issue the reset command. Enter: CM> SP
NOTE: If you have a 99X system, you must transfer to the service processor before you reset the system.
CM> RS ** Hard reset ** or CM> TC ** Soft reset **

If you have a 9X8LX or 9X8RX system, a PDC menu is displayed when you issue CTRL B. From that menu, you can proceed to boot your system by typing BO. No specific reset is required.

Example 2-1 demonstrates a soft reset of the system with autoboot disabled using the console and AP commands for a Series 949 system. The reset screen may a contain different boot path and additional information, depending on the system you are using.

Example 2-1 Resetting an N-CLass System Using GSP Commands:
Autoboot Disabled

 :<ctl-B>GSP Host Name:  csyprel18(csysas18)GSP> tcTCExecution of this command irrecoverably halts all system processing andI/O activity and restarts the computer system.Type Y to confirm your intention to restart the system: (Y/[N])y********** VIRTUAL FRONT PANEL **********System Boot detected*****************************************LEDs:  RUN      ATTENTION     FAULT     REMOTE     POWER       FLASH    FLASH         OFF       ON         ONplatform                  config                    626Fprocessor                 test                      1142processor                 test                      1100processor                 test                      1100processor                 test                      1100 . . .memory                    test                      71A8memory                    test                      71A8memory                    config                    7280I/O                       test                      8107I/O                       test                      8107processor                 test                      1142platform                  test                      612AI/O                       config                    8238***************************************************** EARLY BOOT VFP *************End of early boot detected*****************************************Firmware Version  21.32Duplex Console IO Dependent Code (IODC) revision 1------------------------------------------------------------------------------   (c) Copyright 1995-2000, Hewlett-Packard Company, All rights reserved------------------------------------------------------------------------------  Processor   Speed            State           CoProcessor State  Cache Size  Number                                       State              Inst    Data  ---------  --------   ---------------------  -----------------  ------------      1      540  MHz   Active                 Functional         512 KB   1 MB      3      Unknown    Stopped:Deconfigured   Unknown            512 KB   1 MB  Central Bus Speed (in MHz)  :        133  Available Memory            :    2097152  KB  Good Memory Required        : Not initialized. Defaults to 32 MB.   Primary boot path:    0/0/2/0.6   Alternate boot path:  0/12/0/0.2   Console path:         0/0/4/0.0   Keyboard path:        0/0/4/0.0---- Main Menu-------------------------------------------------------     Command                           Description     -------                           -----------     BOot [PRI|ALT|<path>]             Boot from specified path     PAth [PRI|ALT|CON|KEY] [<path>]   Display or modify a path     SEArch [DIsplay|IPL] [<path>]     Search for boot devices     COnfiguration menu                Displays or sets boot values     INformation menu                  Displays hardware information     SERvice menu                      Displays service commands     DeBug menu                        Displays debug commands     MFG menu                          Displays manufacturing commands     DIsplay                           Redisplay the current menu     HElp [<menu>|<command>]           Display help for menu or command     RESET                             Restart the system----Main Menu: Enter command or menu >

Answering NO to the boot path prompt initiates other prompts that query for the proper path to the boot device. If you answer YES to the primary path prompt, the system displays additional messages as it boots the processor and operating system.

Example 2-2 demonstrates a soft reset of the system with autoboot enabled, using console and AP/GSP commands for a N class system. The reset screen may contain a different boot path display and additional information, depending on the system you are using.




	NOTE: If you have a 99X system, you must transfer to the service processor before you reset the system: `CM>` `SP` If you have a 9X8LX or 9X8RX system, you need to type BO to boot the system from the primary path.

Example 2-2 Resetting an N class System Using AP/GSP Commands
Autoboot Enabled

 :<ctl-B>GSP Host Name:  csyprel18(csysas18)GSP> tcTCExecution of this command irrecoverably halts all system processing andI/O activity and restarts the computer system.Type Y to confirm your intention to restart the system: (Y/[N]) yy   -> SPU hardware was successfully reset.GSP Host Name:  csyprel18(csysas18)GSP>********** VIRTUAL FRONT PANEL **********System Boot detected*****************************************LEDs:  RUN      ATTENTION     FAULT     REMOTE     POWER       FLASH    FLASH         OFF       ON         ONplatform                  config                    626Fprocessor                 test                      1142processor                 test                      1100processor                 test                      1100. . . .processor                 test                      1110processor                 INIT                      1701processor                 test                      1110processor                 test                      1142processor                 test                      1142memory                    config                    7280memory                    test                      71A8memory                    test                      71A8. . . .memory                    test                      71A8memory                    config                    7280I/O                       test                      8107I/O                       test                      8107processor                 test                      1142platform                  test                      612AI/O                       config                    8238***************************************************** EARLY BOOT VFP *************End of early boot detected*****************************************Firmware Version  21.32Duplex Console IO Dependent Code (IODC) revision 1------------------------------------------------------------------------------   (c) Copyright 1995-2000, Hewlett-Packard Company, All rights reserved------------------------------------------------------------------------------  Processor   Speed            State           CoProcessor State  Cache Size  Number                                       State              Inst    Data  ---------  --------   ---------------------  -----------------  ------------      1      540  MHz   Active                 Functional         512 KB   1 MB      3      Unknown    Stopped:Deconfigured   Unknown            512 KB   1 MB  Central Bus Speed (in MHz)  :        133  Available Memory            :    2097152  KB  Good Memory Required        : Not initialized. Defaults to 32 MB.   Primary boot path:    0/0/2/0.6   Alternate boot path:  0/0/1/0.6   Console path:         0/0/4/0.0   Keyboard path:        0/0/4/0.0Processor is booting from first available device.To discontinue, press any key within 10 seconds.10 seconds expired.Proceeding...Trying Primary Boot Path------------------------Booting...Boot IO Dependent Code (IODC) revision 1SOFT Booted.MMSAVE Version 2.5DUMPAREA found, save main memory to discISL loadedISL Revision A.00.43  Apr 12, 2000  [insert autoboot past isl)

If you do not press a key to interrupt the sequence, the system displays messages as it automatically boots the processor and operating system.

The autoboot flag setting determines whether the system searches for an autoexecute file with which to boot the operating system automatically.




	NOTE: If an autobooting system cannot locate a valid autoexecute file, it boots to ISL; therefore, you see the statement `Cannot find an autoexecute file. AUTOBOOT ABORTED.` This does not present any problems; just continue with the START command in ISL.




	NOTE: Disabling and enabling autoboot is explained in Chapter 3 “System Startup Functions”

Resetting the System

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Soft Reset

Hard Reset

Resetting the System Using the Console