lun discover in RHEL5.3

[ani007]

Hi,
My server is RHEL5.3.I need to extend one filesystem.Storage team assigned 100GB lun.Powerpath is not there only multipath is there.How can i identify the lun from unix end.
Regards,
Ani

[Matti_Kurkela · Accepted solution]

See RedHat Online Storage Reconfiguration Guide:

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Online_Storage_Reconfiguration_Guide/index.html

There are many ways to identify the LUN.
- "multipath -l" will display the WWID number of the LUN

- "sginfo -s " will display the serial number of the disk/LUN. On EMC hardware, the serial number consists of part of the Storage serial number + EMC LUN identifier + some other numbers. See EMC documentation for instructions on decoding the serial number.

- if you have installed a storage-manufacturer-specific utility, it may be the easiest way to identify the LUNs. For example, EMC offers an "inq" tool for free, and the SYMCLI toolkit with an appropriate license. HP provides a tool called "evainfo" tool for use with HP EVA storage.

MK

[taylan kurtkaya]

Hi Ani,

You will find a script at the attach file. Run the script, it will show you luns briefly. (script is only for 64 bit OS)

regards.

[ani007]

Thanks every one.