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10-25-2012 02:32 PM
10-25-2012 02:32 PM
How to configure LUN ?
Hi,
10GB of LUN assigned by Storage team and the device given is 16DD.
i WANT TO KNOW , hOW TO CONFIGURE IT NOW ?
How to create the mount point for the device ?
How to find the LUN which is allocated by the Storage Team ?
Please help me with the steps and commands to execute ...........
Regards,
Aparna.
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10-25-2012 03:19 PM
10-25-2012 03:19 PM
Re: How to configure LUN ?
This variees based on the type of storage.
In general, ioscan perhaps with insf -C disk will put the new LUN in a state where it has been discovered and you can run pvcreate on it.
EMC utilities have a utility that must be run to discover new EMC luns. The procedure varies OS to OS.
Regards,
SEP
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10-26-2012 01:07 AM
10-26-2012 01:07 AM
Re: How to configure LUN ?
> How to create the mount point for the device ?
Once you detect the new LUN in the "ioscan -fnC disk" output, run LVM commands to make the new LUN part of a new or existing volume group. Create a Logical volume on it to mount the device..
> How to find the LUN which is allocated by the Storage Team ?
It depends on the type of storage used. Example: for eva and XP storage, you can use the "evainfo" and "xpinfo" utilities from the HP-UX to see the storage luns presented.
Pradeep
I am an HP Employee
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10-26-2012 07:33 AM
10-26-2012 07:33 AM
Re: How to configure LUN ?
> 10GB of LUN assigned by Storage team and the device given is 16DD.
A 4-digit hex identifier for the device... seems like it might be an EMC storage system.
Here is the download location for a free EMC tool for identifying EMC disks:
ftp://ftp.emc.com/pub/elab/inquiry/
Currently, the latest version is here:
ftp://ftp.emc.com/pub/elab/inquiry/v7.3.2.0/
Pick the appropriate version for your HP-UX system: inq.HPUXIA64 for Itanium systems, inq.hpux64 for 64-bit PA-RISC HP-UX 11i systems, or inq.hpux1100 for obsolete HP-UX 11.00 or 32-bit 11i v1 systems.
Download in binary mode (default in most web browsers), save to your HP-UX systems and set it as executable.
To detect new devices, run "ioscan -fnCdisk" and then "insf" as others have already pointed out. (In 11.31, insf may not be needed, but it is not harmful.)
Then run the downloaded inq command. It will output a list of all disks in the system.
For devices with "EMC" in "Vendor" column, look at the "Ser Num" column: it will contain a 10-digit hex number.
The middle 4 digits of the Ser Num field will contain the device identifier.
The EMC device serial number format: SS0XXXXnnn
- SS = the 2 last digits of the serial number of the storage system
- XXXX = the 4-digit device ID
- nnn = usually all zeroes; may be different in some storage system configurations
You may see multiple disks with the same "Ser Num" field: these are multiple I/O paths to the same LUN.
If you are using HP-UX 11.31, the OS will automatically handle this and you should use only the /dev/disk/diskNN device for configuring LVM; for older HP-UX versions, you should specify all the /dev/dsk/cXtYdZ devices referring to a particular LUN in your LVM configuration, so LVM will automatically list them as alternate paths and will failover to another path if the active path fails.