Using the SYSGEN I/O Configurator

To view and modify the I/O configuration from within SYSGEN, you use the I/O configurator module. To do so, start SYSGEN and enter IO at the SYSGEN prompt. SYSGEN displays the commands available to you. To issue a command, you can enter either the full command name or the abbreviation shown in parentheses.

Example 5-1 Starting the I/O Configurator

:SYSGEN

sysgen>IO



        ** I/O configurator commands **



        aclass (ac)      adev (ad)       apath (ap)      avol (av)

        dclass (dc)      ddev (dd)       dpath (dp)      dvol (dv)

        lclass (lc)      ldev (ld)       lpath (lp)      lvol (lv)

        maddress(ma)     mclass (mc)     mdev (md)       mpath (mp)

        mvol (mv)



        clear (cl)(c)    exit (ex)(e)    help (he)(h)    hold (ho)

        oclose (oc)      redo



       io>

Getting help with I/O Configurator commands

The help facility enables you to identify quickly the function and syntax of those I/O configurator commands and options required to perform the multiple operations that define or change device-dependent information.

To see a list of the commands available for use in the I/O configurator and their abbreviations, enter HELP at the I/O configurator prompt. To display the syntax for each available command at the current level, enter HELP ALL, as shown in the example below:

Example 5-3 I/O Configurator HELP ALL Command Output

   io>HELP ALL



      command (abb)   parameter=value

      -------------   ---------------



      aclass (ac)     class      = name

                      ldev       = #/#,#,...

                      [mode      = IN|OUT|CIO|NCIO|RANDOM|

                                   DEFAULT]



      adev (ad)       ldev       = #/#,#,...

                      [path       = devicepath]

                      id         = productid

                      [rsize     = recordsize]

                      [outdev    = outputdevice]

                      [mode      = JOB|DATA|INTERACTIVE|DUPLICATIVE|

                                   INPUT|OUTPUT|AUTOREPLY|NLIO|NONE]

                      [class     = classname,...|NONE]

                      [cmode     = IN|OUT|CIO|NCIO|RANDOM|

                                   DEFAULT]

                      [pmgr      = physicalmanagername]

                      [lmgr      = logicalmanagername]

                      [pmgrpri   = physicalmanagerpriority]

                      [mpetype   = compmodetype]

                      [mpesubtype= compmodesubtype]

                      [devname   = devicename]

                                 .

                                 .



      mpath (mp)      path       = devicepath

                      [id        = productid]

                      [pmgr      = managername]

                      [lmgr      = managername]

                      [pmgrpri   = managerpriority]

                      [maxios    = maxconcurrentchannelI/Os]



      mvol (mv)       vname      = volumename

                      [newname   = newvolumename]

                      [ldev      = logicaldevice#]

                      [transient = %ofdiscfortransientobjects]

                      [permanent = %ofdiscforpermanentobjects]

                      [vclass    = volumeclass]

To view the syntax for a specific I/O configurator command, enter HELP commandname at the I/O configurator prompt. For example, to get information about the ADEV command, you would enter HELP ADEV.

Example 5-4 I/O Configurator Command HELP Output



   io>HELP ADEV



      adev (ad)       ldev       = #/#,#,...

                      path       = devicepath

                      id         = productid

                      [rsize     = recordsize]

                      [outdev    = outputdevice]

                      [mode      = JOB|DATA|INTERACTIVE| DUPLICATIVE|

                                   INPUT|OUTPUT|AUTOREPLY|NLIO|NONE]

                      [class     = classname,...|NONE]

                      [cmode     = IN|OUT|CIO|NCIO|RANDOM|

                                   DEFAULT]

                      [pmgr      = physicalmanagername]

                      [lmgr      = logicalmanagername]

                      [pmgrpri   = physicalmanager priority]

                      [mpetype   = compmodetype]

                      [mpesubtype= compmodesubtype]

                      [devname   = devicename]

   io>

Using I/O Configurator commands

The I/O configurator commands let you list, modify, add, and delete four types of objects: classes, devices, paths, and volumes. You can also use the I/O configurator to modify addresses with the MADDRESS command. In addition to these specific functions, the I/O configurator includes the commands that are common to all SYSGEN configurators: CLEAR, EXIT, HELP, HOLD, and OCLOSE.

Table 5-1 IO Configurator Command Matrix

	List	Modify	Add	Delete
Class	`LCLASS`	`MCLASS`	`ACLASS`	`DCLASS`
Device	`LDEV`	`MDEV`	`ADEV`	`DDEV`
Path	`LPATH`	`MPATH`	`APATH`	`DPATH`
Volume	`LVOL`	`MVOL`	`AVOL`	`DVOL`
Address		`MADDRESS`

Viewing the current configuration

To get information about the current configuration, either displayed on screen or printed, using the LCLASS, LDEV, LPATH, and LVOLcommands as described in the following table.

Table 5-2 I/O Configurator List Commands

Command	Definition	Examples
`LCLASS`	Lists the class name or names you specify with the command, the class modes, and the devices associated with the classes in the I/O configuration. A class name is an identifier to which numerous devices can be assigned. Unlike LDEV numbers, device class names are not unique to each device. For example, all of your system's printers could be assigned the class name `LP`. (`LP`, which stands for "line printer," is a common device class name.) For more information, refer to the Controlling System Activity (32650-90155). It provides detailed information about device class names, their modes of operation, and how they are assigned in the system.	`LCLASS DISC` `LCLASS (DISC,LP)`
`LDEV`	Lists the attributes of the specified logical device or devices. If you omit the LDEV number, all of the I/O devices and their characteristics are listed. Each configured logical device (LDEV) has a uniquely assigned LDEV number which identifies a physical device associated with a system.	`LDEV CLASS=(LP,EPOC)` `LDEV (4/9,11/14)`
`LPATH`	Lists information about the adapters and I/O devices on a specified path level. You can list a specific path, list paths a specific level, or list all paths associated with an I/O manager.	`LPATH PATH=4` `LPATH,1` `LPATH MANAGER=CIPER_DM`
`LVOL`	Lists the attributes of the specified volume, which is one disk pack. Each volume is a member of a volume set and contains a volume label, a label table, and a free space map. When you enter the LVOL command for a specific volume, you will see the volume's LDEV number, the amount of transient and permanent space it has, its class status, and the volume class it belongs to.	`LVOL MEMBER1`

Printing the configuration information

You can use the OFFLINE option to send the output of the listing commands, LCLASS, LDEV, LPATH or LVOL, to the file SYSGLIST. Using OFFLINE does not immediately generate printed output. The information is sent to SYSGLIST until you either enter the OCLOSE command or exit SYSGEN. Exiting SYSGEN or using OCLOSE closes SYSGLIST and prints the file.

For example, to print information about all devices with device class DISC and LP on your system, do the following:

At the I/O Configurator prompt (>io) enter:
io>LCLASS (DISC,LP) DEST=OFFLINE
Or, you can enter the command this way:
io>LCLASS (DISC,LP) OFFLINE
To close the file SYSGLIST and print the information, enter
io>OCLOSE

Sample configuration data

Below is an example of the kind of information you might see if you entered the LDEV command, without additional parameters, at the I/O configurator prompt on a Series 925 system.

Example 5-8 Listing Configured Devices: Series 925 System

        io>LDEV

    LDEV:     1   DEVNAME:         OUTDEV:    0  MODE: 

      ID: HP7937H                  RSIZE:   128  DEVTYPE: DISC

    PATH: 4.1.0                    MPETYPE:   3  MPESUBTYPE: 10

   CLASS: DISC       SPOOL  



    LDEV:     2   DEVNAME:         OUTDEV:    0  MODE: 

      ID: HP7937H                  RSIZE:   128  DEVTYPE: DISC

    PATH: 4.1.1                    MPETYPE:   3  MPESUBTYPE: 10

   CLASS: DISC       SPOOL  



    LDEV:     3   DEVNAME:         OUTDEV:    0  MODE: 

      ID: HP7937H                  RSIZE:   128  DEVTYPE: DISC

    PATH: 4.1.2                    MPETYPE:   3  MPESUBTYPE: 10

   CLASS: DISC       SPOOL  



    LDEV:     4   DEVNAME:         OUTDEV:    0  MODE: 

      ID: HP7937H                  RSIZE:   128  DEVTYPE: DISC

    PATH: 4.1.3                    MPETYPE:   3  MPESUBTYPE: 10

   CLASS: DISC       SPOOL  



    LDEV:     6   DEVNAME:         OUTDEV:    0  MODE: 

      ID: HP2566A                  RSIZE:    66  DEVTYPE: LP

    PATH: 4.5.6                    MPETYPE:  32  MPESUBTYPE:  9

   CLASS: LP  



    LDEV:     7   DEVNAME:         OUTDEV:    0  MODE: 

      ID: HP7980A                  RSIZE:   128  DEVTYPE: TAPE

    PATH: 4.5.3                    MPETYPE:  24  MPESUBTYPE:  5

   CLASS: TAPE    



    LDEV:    10   DEVNAME:         OUTDEV:   LP  MODE:  JA

      ID: HP7980A                  RSIZE:   128  DEVTYPE: TAPE

    PATH: 4.5.4                    MPETYPE:  24  MPESUBTYPE: 5



    LDEV:    20   DEVNAME:         OUTDEV:   20  MODE: JAID

      ID: HP2392A                  RSIZE:    40  DEVTYPE: TERM

    PATH: 4.2.0                    MPETYPE:  16  MPESUBTYPE:  0

   CLASS: CONSOLE  



    LDEV: 100/111 NMMGR



        io>

Adding Objects in SYSGEN

When you use SYSGEN to add objects to the system configuration, there are four I/O Configurator commands available: ACLASS, ADEV, APATH and AVOL. They are defined in the table below. For more detailed information read Performing System Manager Tasks (32650-90004).

Table 5-3 I/O Configurator Add Commands

Command	Definition	Examples
`ACLASS`	Creates a new class name and associates devices to the new class. You use the `ACLASS` command to add a class name designation to a device that is already configured with the `ADEV` command. You also specify the mode with this command, which can be one of `JOB` (accepts jobs and sessions), `IN` (input only), `OUT` (output only), `CIO` (concurrent I/O), `NCIO` (nonconcurrent I/O), `RANDOM` (direct-access device such as a disk), and `DEFAULT` (a mode assigned when the system is initialized).	`ACLASS EPOC 19` `ACLASS PLATES 31/34 MODE=RANDOM`
`ADEV`	Adds a device to an existing I/O path that is configured to the device adapter level. At a minimum, you must specify the LDEV, the path, and ID number, but you may also specify the record size, an output device associated with the device, the device operation mode, the class, a class mode (other than the default assigned to the device), physical and logical device managers, the priority level of the physical device manager, the compatability mode type and subtype,and a device name.	`ADEV LDEV=30 PATH=4.5.9 ID=HP2688A` `ADEV 8 PATH=2/4.2.1 ID=HP7978B RSIZE=132`
`APATH`	Defines the I/O path to an adapter, not to a device. (To add device level paths, you use the `ADEV` command.) If the path has already been defined, you will get an error. At a minimum, you must enter the path and an ID, which is either the Hewlett-Packard product number or a mnemonic name that designates different uses of the same product. You may also specify the physical and logical device managers, the execution priority of the physical device manager, and the maximum number of concurrent I/Os to expect.	`APATH PATH=4.2 ID=HP27113A`
`AVOL`	Adds a new volume to the system volume set configuration. You must specify a unique name you give to each volume member and its logical device number. In addition, you may also specify the volume class and the amounts of transient and permanent disk space allocated on the volume.	`AVOL VNAME=MEMBER2 LDEV=4 VCLASS=PROD`

You use the NMMGR program to add non-local devices such as terminals, serial printers, UPS hardware and other objects to a system. To learn how to configure UPS devices, read “Introducing the UPS and UPS Monitor/iX Software” later in this chapter. To learn how to use NMMGR to configure other devices, read Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-61000).

Changing Configurations in SYSGEN

When you use SYSGEN to change the system configuration, there are five I/O Configurator commands available: MADDRESS, MCLASS, MDEV, MPATH, and MVOL. They are defined in the table below and explained in the following sections.

Table 5-4 I/O Configurator Modify Commands

Command	Definition	Examples
`MADDRESS`	Modifies the I/O path from one that exists to a new path that does not already exist. You specify the old path and the new path, both of which must have the same number of levels.	`MADDRESS 2/4.0.2 6/4.0.3`
`MCLASS`	Changes I/O class information including the class mode, the class name, and the devices associated with the class.	`MCLASS CLASS` `LP NEWCLASS=BIGPRN MODE=OUT` `MCLASS BONSAI SMALLPRN 28/29`
`MDEV`	Changes the attributes of a configured device. You specify the LDEV number of the device you want to modify, then enter the new paramaters. This commands changes the LDEV number itself, the device ID, the device path, class, mode, record size, physical and logical device manager, the compatability mode type and subtype, and the device name.	`MDEV 8 18 HP7978H 4.3.0 MODE=JOB`
`MPATH`	Changes the attributes of an I/O path. You can modify the path name, the product ID, the physical and logical device managers, the execution priority of the physical device manager, and the maximum number of concurrent I/Os to expect.	`MPATH 4.1 HP27113A` `MPATH 2/4.3 PMGR=HPIB_DAM`
`MVOL`	Modifies the attributes of a volume set member. You can modify the volume name, volume class and the amounts of transient and permanent disk space allocated on the volume.	`AVOL VNAME=MEMBER2 TRANSIENT=30 PERMANENT=70`

Deleting Objects in SYSGEN

When you use SYSGEN to delete objects from the system configuration, there are four I/O Configurator commands available to you: DCLASS, DDEV, DPATH, and DVOL. They are defined in the table below and explained in the following sections.

Table 5-5 I/O Configurator Delete Commands

Command	Definition	Examples
`DCLASS`	Removes one or more class names from the system. If the class does not exist, or if you attempt to delete the DISC, CONSOLE, or TAPE classes, SYSGEN displays an error message.	`DCLASS EPOC` `DCLASS (EPOC,FASTLP)`
`DDEV`	Removes a specific device, range of devices, all products of a given product identification, all devices of a given type, or all devices of a given class name. You cannot delete the system disk (LDEV 1) or the system console (LDEV 20).	`DDEV LDEV=123` `DDEV ID=HP2932A`
`DPATH`	Deletes an I/O path and, optionally, all the I/O paths below it in the configuration. If there are I/O paths below the one you are deleting, SYSGEN prompts you to confirm the action before deleting them. If an I/O path is currently used by a configured device, SYSGEN issues an error and does not delete the path.	`DPATH 4.2` `DPATH 2/8.2`
`DVOL`	Deletes a volume member from the system configuration. To implement the change, you must create a system load tape with the new configuration and then use it to do an `INSTALL`.	`DVOL MEMBER2`

Changing the configuration online

A new command file, DOIONOW, has been added to MPE/iX which allows the system manager to immediately implement device configuration changes made with SYSGEN. This command allows you to keep the system online and available to users more of the time, and gives you the flexibility to change the configuration on an "as needed" basis.

To change the configuration while the system is online, do the following:

Make the necessary changes to the configuration with the I/O Configurator. (This process is no different than it was before; for more information, read the previous section of this chapter "Using SYSGEN's I/O Configurator".
Keep the configuration changes and exit SYSGEN. The information is saved in the file LOG4ONLN.PUB.SYS, which is used by the DOIONOW command.
At the CI prompt, execute the DOIONOW command by entering:
:DOIONOW
DOIONOW passes the LOG4ONLN file, which contains the new configuration information, to IOCONFIG, which begins making the changes. If LOG4ONLN is not found, you will see the following error message displayed on the console:
NO PENDING SYSGEN CONFIG CHANGES

The DOIONOW command creates a log file, ONLNOLOG.PUB.SYS, which is used to record the commands executed by IOCONFIG. If the DOIONOW command generates an error, you may view this same log file to determine the cause. This log file is purged and a new one is created prior to invoking the new configuration, which means that it only contains information for the last execution of IOCONFIG. Once you have found the problem, you can then edit the input file for the DOIONOW command, LOG4ONLN.PUB.SYS, to avoid duplicating the events that created the error.