Adding a Peripheral to Any System

Adding a disk drive, tape drive, or printer to a system's configuration includes the following steps:

enter SYSGEN
view the system's current configuration
activate the IO configurator
make the necessary I/O configuration changes
hold the changes
save the changes
verify the accuracy of the new configuration

Activate SYSGEN's global module.

Enter the SYSGEN command at the system prompt.

   :SYSGEN



   SYSGEN  version B.06.01 :  catalog version B.06.02      FRI,  May 20, 

   1988





    ** First level command **



    io                log (lo)       misc (mi)        spu (sp)

    sysfile (sy)



    basegroup (ba)    keep (ke)      permyes (pe)     show (sh)

    tape (ta)



    clear (lc)(c)     exit (ex)(e)   help (he)(h)     oclose (oc)

    redo



   sysgen>

Select the base group to modify.
If you desire to modify the default configuration groups, copy the groups to other group names and modify the copies using the IO configurator. Copying the groups preserves uncorrupted versions of the default or current configurations.
To copy configuration groups, use the BASEGROUP command to activate the desired configuration group. Use the KEEP command to save the group of files to another group name. Refer to Chapter 4 “Using the System Generator (SYSGEN)” for more information on using the BASEGROUP and KEEP commands.
After deciding which copied configuration group to modify, use the global module BASEGROUP command to activate the group:
sysgen>BASEGROUP groupname
Use the I/O configuration contained in CONFG935 as an example configuration for this exercise.

Activate the IO configurator.

Enter the global module command, IO, at the SYSGEN prompt to activate the IO configurator:

   sysgen>IO



   ** IO 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>

Obtain I/O configuration listings.
Enter LCLASS, LDEV, and LPATH, at the IO configurator prompt to get current I/O configuration listings:
io>LCLASS DEST=OFFLINE io>LDEV DEST=OFFLINE io>LPATH DEST=OFFLINE io>OCLOSE
The OCLOSE command closes SYSGEN's listing file, SYSGLIST, and prints the information in the file.
Refer to Chapter 5 “Modifying Input/Output (I/O) Configurations” for more information on using the LCLASS, LDEV, LPATH, and OCLOSE commands.
Decide on which LDEV to add the drive.
View the LDEV command output. Choose any unused LDEV and consider assigning it to the disk drive. For this example, use LDEV 4.
Decide on the class of the added peripheral.
View the LCLASS listing. If it contains a class (DISC) assigned to a particular type of peripheral (in this case, a disk drive), use that class for your addition. Remember, each device can simultaneously belong to up to eight classes.
If your configuration does not contain a class name for the additional peripheral, the system will create a class name for you if you use a name that does not exist. Class names may not exceed eight characters and must begin with an alphabetic character.
Add the path.
Since you are adding the drive to a newly installed HP-IB card, you must define the path down to the device adapter level. Use the APATH command to define the path.
For example, add the drive to a newly installed HP-IB card (ID number, HP27113A). The HP Service Representative who installed the card placed it in the CIO expander (CA 36) on channel adapter 2, and device adapter slot 2. Enter:
io>APATH 36.2 HP27113A
Refer to Chapter 5 “Modifying Input/Output (I/O) Configurations” for additional information on using the APATH command.
Add the device.
Use the ADEV command to add the device, including the device address, to the path specified with the APATH command. Enter:
io>ADEV LDEV=4 PATH=36.2.0 ID=HP7937H CLASS=DISC
Refer to Chapter 5 “Modifying Input/Output (I/O) Configurations” for additional information on using the ADEV command.
Hold all changes.
Enter the IO configurator HOLD command at the IO configurator prompt:
io>HOLD
Refer to Chapter 5 “Modifying Input/Output (I/O) Configurations” for additional information on using the HOLD command.
Exit the IO configurator.
Enter the EXIT command at the IO configurator prompt:
io>EXIT sysgen>
Save changes in a permanent file.
Enter the global module KEEP command at the SYSGEN prompt:
sysgen>KEEP CONFIG
CONFIG is the group name under which you save the modified files. Each time you start up the system, the group CONFIG will then be the default.
Refer to Chapter 4 “Using the System Generator (SYSGEN)” for additional information on using the KEEP command.
Generate a boot tape.
Mount a write-enabled tape on the tape drive. Enter:
sysgen>TAPE
The system may place a tape request similar to the following:
?11:10/#S1/46/LDEV# FOR "SYSGTAPE" ON TAPE (NUM)?
If this message appears, respond:
CTRL A =REPLY pin,7
where pin is the PIN (in this instance 46) from the third location in the tape request.
After all the files are stored, unload the tape, and write protect it. Label the tape, and store it, in a secure location, with any other backup materials.
Exit SYSGEN and reboot the system.
sysgen>EXIT




	NOTE: Any disk device smaller than 400 Mbytes should not be installed as the system disk (LDEV 1). A disk this size or smaller is too small to run the operating system and its subsystems. A 400-Mbyte or smaller disk, however, can be used as any other LDEV.

In this procedure, the system manager chains (configures) a tape drive to another configured device, (commonly referred to as a host device). The host device doesn't have to be physically attached to the system to configure the tape drive but when the tape drive is connected, the host device must be present.

Adding a Peripheral to Any System

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