Setup guide

Configure XR storage
Create LUNs
1 In a terminal, as root, run /usr/discreet/DKU/current/Utils/Storage/XR/XR_config.pl.
The XR Configuration Utility exits without configuring your storage if any of the following is true:
■ The total number of disks is not a multiple of 12.
■ One of more of the enclosures does not have the correct firmware.
■ When using two sets of enclosures, the number of expansion chassis attached to each XR RAID
enclosure is not the same.
■ An odd number of enclosures in a 4-loop configuration. Only even numbers of enclosures are
supported.
2 The script displays information about the storage, and if a LUN configuration already exists on the
storage, you are prompted for confirmation to overwrite that configuration.
WARNING LUN setup destroys data on the device.
3 The utility detects the number of enclosures and drives and presents you with a list of options. Choose
2 to create LUNs with a sector size of 512 bytes. This is the optimal sector size for XFS DAS
(direct-attached) storage of Creative Finishing applications.
4 Choose 2-loop or 4-loop configuration. 4-loop configurations are only supported for XR 6412 and XR
6500 storage. The utility creates LUNs on your storage. This process might take a few minutes.
5 When the LUN creation process completes, you are prompted to create the XFS filesystem.
■ If configuring arrays with two XR enclosures, type N . If you answer Y (the default) by mistake, you
get another chance to answer no after the system rescans the disks. Do not create the filesystem
until you have create LUNs on all enclosures.
■ If you have only one XR enclosure choose Y to create the XFS filesystem,
Create the XFS filesystem
1 After choosing Y, and type Yes to confirm the detected devices. The configuration utility partitions
the storage array, groups the partitions into a logical volume, creates the XFS filesystem on the volume,
and mounts the volume to /mnt/StorageMedia on an HP Z800, or /mnt/stoneMedia on older
workstations. If the storage driver does not reinitialize quickly enough after LUN creation, the filesystem
creation step may fail, and the XR Configuration Utility posts an error like: "Can't open /dev/sdb1
exclusively. Mounted filesystem?" The filesystem will appear mounted. Type pvdisplay -v in the terminal
to verify that the physical volume, volume group and logical volume were created. If the physical
volume, volume group and logical volume were not created, reboot your workstation, and perform
the steps in To perform only the filesystem creation operations: (page 33).
2 Exit the configuration script with x.
3 Even though your storage array is usable at this point, the drives are still initializing following the LUN
creation. Your storage operates at reduced performance until the initialization process completes. This
might take a few hours. To check the progress of the initialization run the command
/usr/discreet/DKU/current/Utils/Storage/XR_config.pl --arrayStatus
4 Once the initialization process completes, create a back-up of the storage configuration with the
command: /usr/discreet/DKU/current/Utils/Storage/XR_config.pl --saveConfig.
Arrays with two enclosures
1 After creating the LUNs on the first set of enclosures, power off the workstation, disconnect the storage
enclosures, and connect the second set of enclosures, then power the workstation back on.
32 | Chapter 4 Install Linux