AIX

please try these two commands - if you get an error the disk is closed, if you get any content, the disk is open / readable

Code:

readvgda /dev/hdiskX

and

Code:

lqueryvg -At -p hdisk0

zxmaus: thanks, but these commands are not what I meant. At least according to my findings.

Some of my systems have lots of LUN-s, used for various purposes:
* used as PV-s in some VG-s (mostly rootvg)
* used as GPFS NSD backing devices
* used as Oracle ASM data disks
and some more.

Your commands can show relevant info only for LUNS used as PV disks, but they are misleading on other cases.

Now I can try to run

Code:

rmdev -l hdiskXX

and see if it can put the device into DEFINED state. When the device is open, I get an error and the device state is kept unchanged. But I would like to find a way to obtain the same info without modifying the system. By the way, how does rmdev find this info?

--Trifo