Example of how to create a sctl device file for SCSI (PA-RISC)
In this example, the following robots exist:
An ADIC Scalar 100 library is on a SCSI bus with an instance number of 7, SCSI ID 2, and LUN 0.
The robotic control for an IBM ULT3583-TL library is on the same SCSI bus at SCSI ID 3 and LUN 0.
To create SCSI robotic device files for HP-UX PA-RISC
- Invoke the ioscan -f command, as follows:
ioscan -f Class I H/W Path Driver S/W State H/W Type Description ================================================================= ext_bus 7 0/7/0/1 c720 CLAIMED INTERFACE SCSI C896 Fast Wide LVD target 10 0/7/0/1.0 tgt CLAIMED DEVICE tape 65 0/7/0/1.0.0 stape CLAIMED DEVICE QUANTUM SuperDLT1 target 11 0/7/0/1.1 tgt CLAIMED DEVICE tape 66 0/7/0/1.1.0 stape CLAIMED DEVICE QUANTUM SuperDLT1 target 12 0/7/0/1.2 tgt CLAIMED DEVICE autoch 14 0/7/0/1.2.0 schgr CLAIMED DEVICE ADIC Scalar 100 target 13 0/7/0/1.3 tgt CLAIMED DEVICE autoch 19 0/7/0/1.3.0 schgr CLAIMED DEVICE IBM ULT3583-TL target 14 0/7/0/1.4 tgt CLAIMED DEVICE tape 21 0/7/0/1.4.0 atdd CLAIMED DEVICE IBM ULT3580-TD1 target 15 0/7/0/1.5 tgt CLAIMED DEVICE tape 19 0/7/0/1.5.0 atdd CLAIMED DEVICE IBM ULT3580-TD1
- Examine the output for the card instance number and the SCSI ID and LUN of the robotic device, as follows:
The card H/W Path is 0/7/0/1; the card instance number (I column) is 7. Apply the H/W Path value as a mask. The ADIC robotic device (schgr) is at SCSI ID 2, LUN 0 on this bus. The IBM robotic device (schgr) is at SCSI ID 3, LUN 0 on this bus.
- 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 device files follow. For the ADIC robot, the card instance number is 7, the target is 2, and the LUN is 0. For the IBM robot, the card instance number is 7, the SCSI ID is 3, and the LUN is 0.
cd /dev/sctl /usr/sbin/mknod c7t2l0 c 203 0x072000 /usr/sbin/mknod c7t3l0 c 203 0x073000
If you add the robots to NetBackup manually, you specify the following for ADIC robotic control and IBM robotic control respectively:
/dev/sctl/c7t2l0 /dev/sctl/c7t3l0