Creating legacy SCSI and FCP robotic controls on HP-UX

You must create the robotic control device files for the sctl driver manually; they are not created automatically when the system boots.

Before you create the device files, you must do the following:

Install and configure the sctl driver. For more information, see the HP-UX scsi_ctl(7) man page.
The sctl driver may be the default pass-through driver on your system. If so, you do not have to configure the kernel to use the sctl pass-through driver.
Install and configure the schgr device driver. For more information, see the HP-UX autochanger(7) man page.
Attach the devices.

Examples of how to create the device files are available.

To create sctl device files

Invoke the ioscan -f command to obtain SCSI bus and robotic control information.
Examine the output for the card instance number and the SCSI ID and LUN of the robotic device, as follows:
- The instance number of the card is in the I column of the output.
- The H/W Path column of the changer output (schgr) includes the SCSI ID and LUN. Use the card's H/W Path value to filter the changer's H/W Path entry; the SCSI ID and the LUN remain.
Determine the character major number of the sctl driver by using the following command:
```
lsdev -d sctl
```
Examine the output for an entry that shows sctl in the Driver column.
Use the following commands to create the device file for the SCSI robotic control:
```
mkdir /dev/sctl
cd /dev/sctl
/usr/sbin/mknod cCARDtTARGETlLUN c Major 0xIITL00
```
Where:
- CARD is the card instance number of the adapter.
- TARGET is the SCSI ID of the robotic control.
- LUN is the SCSI logical unit number (LUN) of the robot.
- Major is the character major number (from the lsdev command).
- II are two hexadecimal digits that represent the card instance number.
- T is a hexadecimal digit that represents the SCSI ID of robotic control.
- L is a hexadecimal digit that represents the SCSI LUN of the robotic control.

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