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Veritas NetBackup™ SAN Client and Fibre Transport Guide

Last Published: 2020-09-14

Product(s): NetBackup (8.3.0.1)

Example of how to create a sctl device file for FCP (PA-RISC)

The following example shows how create a sctl device file for an HP VLS9000 robot. NetBackup uses the device file for robotic control.

To create an FCP robotic device file for HP-UX PA-RISC

Invoke the ioscan -f command. The following output example is edited for readability:

ioscan -f
Class   I  H/W Path                 Driver  S/W State  H/W Type   Description
=============================================================================
fc      0  0/2/0/0                  td      CLAIMED    INTERFACE  HP Tachyon XL2 Fibre 
                                                                  Channel Mass Storage 
                                                                  Adapter
fcp     4  0/2/0/0.10               fcp     CLAIMED    INTERFACE  FCP Domain
ext_bus 6  0/2/0/0.10.11.255.0      fcpdev  CLAIMED    INTERFACE  FCP Device Interface
target  5  0/2/0/0.10.11.255.0.0    tgt     CLAIMED    DEVICE
autoch  2  0/2/0/0.10.11.255.0.0.0  schgr   CLAIMED    DEVICE     HP      VLS
tape    5  0/2/0/0.10.11.255.0.0.1  stape   CLAIMED    DEVICE     HP      Ultrium 4-SCSI
tape    6  0/2/0/0.10.11.255.0.0.2  stape   CLAIMED    DEVICE     HP      Ultrium 4-SCSI
tape    7  0/2/0/0.10.11.255.0.0.3  stape   CLAIMED    DEVICE     HP      Ultrium 4-SCSI

Examine the output for the card instance number and the SCSI ID and LUN of the robotic device. In this example, the interface card instance number (the I column) is 6. If you use the card's H/W Path value as a mask (0/2/0/0.10.11.255.0), you see the following:
- An HP VLS9000 robot is at SCSI ID 0, LUN 0.
- Three Ultrium 4-SCSI drives are at SCSI ID 0 and LUN 1, LUN 2, and LUN 3.
Determine the character major number of the sctl driver by using the lsdev command, as follows:
```
lsdev -d sctl
Character     Block       Driver          Class  
  203          -1         sctl            ctl
```
The output from this command shows that the character major number for the sctl driver is 203.
The commands to create the device file for the HP VLS9000 robotic control are as follows. The card instance number is 6, the target is 0, and the LUN is 0.
```
cd /dev/sctl
/usr/sbin/mknod c6t0l0 c 203 0x060000
```
If you add the robot to NetBackup manually, specify the following pathname for robotic control:
```
/dev/sctl/c6t0l0
```