Scanning new LUNs from Celerra/VNX File

Once you have provisioned a new LUN (or Symmetrix device), you have to scan for this LUN from Celerra/VNX file components to make use of it at the File side – for making filesystem and then CIFS share/ NFS export. Here we are discussing the simple steps to scan the new LUN.

1. From the GUI – Unisphere Manager

Login to the Unisphere manager console by entering the control station IP address in web browser. Select the system you have to scan for new LUN from top left drop-down. Navigate to System > System Information tab.You will be given with a Rescan All Storage Systems button there which will do the rescan for you.

RescanOnce rescan is completed, the devices/LUNs will be visible under the disks and space will be available as the potential storage for the respective pool (Storage Pool for file).



 2. Now via CLI

From the CLI we have to scan for the new LUN on all data movers. We will use the command server_devconfig. We can run the command for each DM (data mover) separately starting with the standby one first. The syntax for a dual data mover system will be,

server_devconfig server_3 -create -scsi -all      # for standby DM

server_devconfig server_2 -create -scsi -all      # for primary DM

This is the recommended way but I have never heard of any issue occurred while scanning across all DMs at a time.For a multi DM system if we want to scan for all data movers in single command, the only change will be just ALL in the place of the server name.

server_devconfig ALL -create -scsi -all      # for all DMs

After the successful scanning you can find the new devices/LUNs at the bottom of the  output of nas_disks -list command.

$nas_disks -l

id   inuse  sizeMB    storageID-devID           type     name          servers

1     y      11263    CK1234512345-0000    CLSTD   root_disk     1,2

============== Shortened output ==============

18    n     51200    CK1234512345-0010    CLSTD   d18             1,2


You can verify the increased space of the respective pool by running the nas_pool -size [Pool Name].

Hope this post helped you. For more Celerra/VNX posts click here


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