How to determine Hard Disk / LUN serial number.

[Suraj Singh_1]

I need to figure out a way by which i can determine whether a given disk/lun is visible to a HP host through one path or more than one paths.

While determining a solution for this, i need to assume that the HP box does-not have any maltipathing software installed.

Thanks,
Suraj

[Aneesh Mohan]

Hi Suraj,


Try to read LVM header of the device files,if the two or more distinct device files give the exactly same information then you can say they are alternative paths.


root@hpeos003[] echo "0x2008?4D" | adb /dev/dsk/c0t1d0

2008: 894960601 1067429315 894960601 1067430042

root@hpeos003[] echo "0x2008?4D" | adb /dev/dsk/c5t1d0

2008: 894960601 1067429315 894960601 1067430042

root@hpeos003[]

If you have autopath installed on your server ,then you can use the below command for getting the exact information about the alternative links

fyi

#autopath discover
#autopath display


Thanks,
Aneesh

[Suraj Singh_1]

Thanks for your response Aneesh.

I forgot to mention that the disks/luns may or may not be initialised by LVM / VxVM.

So the solution provided by you might not work for the LUNs which are not initialised by LVM.

[john123]

Which storage you are using?
There would be storage specifc commands to find out this (Eg: Sympd, xpinfo, evainfo etc)

Regards
John

[sreekanthtm]

Hi,

You can search for LUN ID. But this is storage specific. You can use evaifo ( in case its an EVA Array) xpinfo -i (For XP Array)

Rgds
Sreekanth

[Aneesh Mohan]

Hi Suraj,

see more info abt evainfo

http://www11.itrc.hp.com/service/cki/docDisplay.do?docLocale=en&docId=emr_na-c01438659-1

Aneesh