Example of how to create sctl device files for FCP (Itanium)
With Fibre Channel, the hardware paths are longer than with SCSI.
In this example, the following devices are attached to the host.
An HP EML E-Series robot with four HP drives (two LTO2 and two LTO3 drives). A separate path exists for each drive pair. The robotic control is through card instance 12 (0/4/1/1.2.12.255.0).
An HP VLS 6000 robot with six drives. The robot is partitioned into two virtual libraries, three Quantum SDLT320 drives in one library and three HP LTO3 drives in the other library. Separate robotic control exists for each library.
To create FCP robotic device files for HP-UX Itanium
- Invoke the ioscan -f command. The following is a command output excerpt that shows the Fibre Channel devices on a host:
ext_bus 4 0/4/1/1.2.10.255.0 fcd_vbus CLAIMED INTERFACE FCP Device Interface target 7 0/4/1/1.2.10.255.0.0 tgt CLAIMED DEVICE tape 18 0/4/1/1.2.10.255.0.0.0 stape CLAIMED DEVICE HP Ultrium 3-SCSI tape 20 0/4/1/1.2.10.255.0.0.1 stape CLAIMED DEVICE HP Ultrium 3-SCSI ext_bus 13 0/4/1/1.2.11.255.0 fcd_vbus CLAIMED INTERFACE FCP Device Interface target 8 0/4/1/1.2.11.255.0.0 tgt CLAIMED DEVICE autoch 4 0/4/1/1.2.11.255.0.0.0 schgr CLAIMED DEVICE HP VLS tape 22 0/4/1/1.2.11.255.0.0.1 stape CLAIMED DEVICE QUANTUM SDLT320 tape 23 0/4/1/1.2.11.255.0.0.2 stape CLAIMED DEVICE QUANTUM SDLT320 tape 24 0/4/1/1.2.11.255.0.0.3 stape CLAIMED DEVICE QUANTUM SDLT320 autoch 5 0/4/1/1.2.11.255.0.0.4 schgr CLAIMED DEVICE HP VLS tape 25 0/4/1/1.2.11.255.0.0.5 stape CLAIMED DEVICE HP Ultrium 3-SCSI tape 26 0/4/1/1.2.11.255.0.0.6 stape CLAIMED DEVICE HP Ultrium 3-SCSI tape 27 0/4/1/1.2.11.255.0.0.7 stape CLAIMED DEVICE HP Ultrium 3-SCSI ext_bus 12 0/4/1/1.2.12.255.0 fcd_vbus CLAIMED INTERFACE FCP Device Interface target 6 0/4/1/1.2.12.255.0.0 tgt CLAIMED DEVICE autoch 1 0/4/1/1.2.12.255.0.0.0 schgr CLAIMED DEVICE HP EML E-Series tape 19 0/4/1/1.2.12.255.0.0.1 stape CLAIMED DEVICE HP Ultrium 2-SCSI tape 21 0/4/1/1.2.12.255.0.0.2 stape CLAIMED DEVICE HP Ultrium 2-SCSI
- Examine the output for the card instance number and the SCSI ID and LUN of the robotic device.
In this example, the following devices are attached to this host:
The robotic control for the HP EML E-Series robot is through card instance 12 (0/4/1/1.2.12.255.0). Two of the drives are accessed through the same path, and the other two are accessed through card instance 4 (0/4/1/1.2.10.255.0).
The robotic controls for the HP VLS 6000 robot partitions are through card instance 13. Robotic control for one partition is at SCSI ID 0 and LUN 0. Robotic control for the other partition is at SCSI ID 0 and LUN 4.
- Determine the character major number of the sctl driver by using the following command:
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 devices file for the robotic controls are as follows:
cd /dev/sctl /usr/sbin/mknod c12t0l0 c 203 0x0c0000 /usr/sbin/mknod c13t0l0 c 203 0x0d0000 /usr/sbin/mknod c13t0l4 c 203 0x0d0400
If you add the robots to NetBackup manually, you specify the following pathnames for robotic control. The first device file is for the HP EML E-Series robot. The second and third device files are for the VLS 6000 robot (two robotic devices).
/dev/sctl/c12t0l0 /dev/sctl/c13t0l0 /dev/sctl/c13t0l4