LUN device file management

[Lonny Balderston]

Greetings. What is the proper way to?: a) install newly created Virtual Array LUN device files; I think it is 1) insf -e 2) ioscan -fnC disk, and b) remove deleted Virtual Array LUN device files. I ask because, on HP 4440 running HP-UX 11.11 and connected EVA5000 running vcs 4.007, I recently removed all EVA LUNs (no, 4440 is not production) using Command View, and device files are still present on 4440 when issuing "ioscan -fnC disk". Thank you.

[Jaime Bolanos Rojas. · Accepted solution]

Lonny,

Once all work of Lun creation is done at the EVA, the SAN should be able to present that as a single drive to HP-UX.

Doing an insf -e should make it visible, and to remove it an rmsf should get rid of the device.

Regards,

Jaime.

[A. Clay Stephenson]

It depends. Consider the case where a device fails and then you install a new device in a different slot. Later you replace the failed device. You would like the replacement drive to be just that : a replacement with the same device node assignments. The system has a file where this data are stored. If you actually want to remove a device and make the system completely forget about the devices then simply rm'ing /dev/xxx won't work because the iotable remains. You use rmsf to remove device files and the corresponding iotable entry.

Now to answer your question about brand, spanking new devices:
ioscan -fn
insf
You should then be ready to use the LUN's as raw devices or as VxVM or LVM disks.

[Sumit Ghosal]

a)To Install disk devices, do - ioscan -fnC disk; insf -C disk

b) For removing the Disk Device Files, use the below script. -

for i in `ioscan -funC disk | grep -i no_hw |awk '{print $3}'`;do rmsf -H $i;done

thanks