HP-UX 11i v3 Operating Environments - How to Change Instance Numbers for Persistent and Legacy Disk Device Files
ISSUE:
How to change the instance numbers for persistent and legacy disk device files in HP-UX 11.31
SOLUTION:
To change instance numbers for persistent and legacy device files, create an infile by using the following 2 commands.
# ioscan -kNf|grep -e INTERFACE -e DEVICE|awk '{printf "%s %s %s\n",$3,$1,$2}' |grep disk > /tmp/infile (for persistent disk devices)
# ioscan -kf|grep -e INTERFACE -e DEVICE|awk '{printf "%s %s %s\n",$3,$1,$2}' |grep disk >> /tmp/infile (for legacy disk devices)
Example of infile:
# cat /tmp/infile
64000/0xfa00/0x0 disk 3
64000/0xfa00/0x1 disk 4
64000/0xfa00/0x2 disk 5
64000/0xfa00/0x3 disk 7 <-instance to change 0/0/2/0.0.0.0 disk 2 0/1/1/0.0.0 disk 1 0/1/1/0.1.0 disk 0 0/1/1/1.2.0 disk 6
In this example, to change persistent device instance 7 to 6, the infile would need to be modified as follows:
# vi /tmp/infile
64000/0xfa00/0x0 disk 3
64000/0xfa00/0x1 disk 4
64000/0xfa00/0x2 disk 5
64000/0xfa00/0x3 disk 6 <-changed to 6 from 7 0/0/2/0.0.0.0 disk 2 0/1/1/0.0.0 disk 1 0/1/1/0.1.0 disk 0 0/1/1/1.2.0 disk 7 <-also needed to be changed
# since a legacy disk device 0/1/1/1.2.0 exists with instance number 6; it also required to changing with unique instance number.
NOTE: Persistent and legacy disk devices use the same class, called disk. So, all the disk instance numbers must be unique across legacy and persistent disk device instance numbers.
The other extra entries may be removed from the /tmp/infile which are not required any instance number changes. However, the other lines will ignored by the ioinit as the input is identical to kernel.
Example:
# cat /tmp/infile
64000/0xfa00/0x3 disk 6 <-changed to 6 from 7 0/1/1/1.2.0 disk 7 <-also needed to be changed
Now, run # ioinit to change the instance numbers.
# ioinit -f /tmp/infile
This will change the instance numbers instantly without any system reboot. Refer #man ioinit(1M) for more details.
To change more than 14 devices at one time without reboot, the following 11i v3 patches or it's superseded patches must be present/installed in the system:
# PHCO_36315 1.0 ioinit(1M) patch
# PHKL_36333 1.0 Support over 14 instance number changes from ioinit
