System Startup, Configuration, and Shutdown Reference Manual (32650-90907)

Appendix F
Adding Peripherals to a System
Adding a Peripheral to Any System
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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>
4. 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.
5. 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 14.
6. 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.
7. Add the path.
Since you are adding the drive to a newly installed PCI SCSI 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 PCI SCSI card (ID number, A5150A). Enter:
io> ap 1/0/0/0 id=A5150A
Refer to Chapter 5, “Modifying Input/Output (I/O) Configurations,” for additional information on using
the APATH command.
8. Add the device.