Xsan 2 Administrator Guide - Setting Up Additional SANs

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Setting Up Additional SANs

You can use Xsan Admin to set up more than one SAN.

To add a new SAN:


Install the hardware, connect the Ethernet and Fibre Channel networks, set up the

client computers, set up standby metadata controllers if you have them, set up the
RAID systems, create a metadata array, and set up the primary metadata controller as
instructed earlier in this chapter.
If you’re setting up a SAN for the first time, see the planning guidelines in
Chapter 2, “Planning a Storage Area Network,” on page 21, and the instructions at the
beginning of this chapter.


Open Xsan Admin on the computer that you want to use to set up and manage the

new SAN.


Choose File > New and follow the instructions in “Step 8: Configure the SAN” on

page 44.


Chapter 3

Setting Up a Storage Area Network

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Use Xsan Admin and related command-line tools to expand,

add, modify, check, and repair SAN volumes.

This chapter shows how you can expand an existing Xsan volume to provide more free
space. It also contains information about volume and storage pool settings, and shows
how to check and resolve volume integrity and fragmentation problems.

Adding Storage

To increase the storage on your SAN, you can:

Add volumes


Add storage pools to existing volumes


Add LUNs to existing storage pools


If you create a volume based on a custom volume type, you work directly with
storage pools. However, if you create a volume using a built-in Xsan volume type (for
example, General File Server or Podcast Producer Cluster), you don’t deal directly with
storage pools. Instead, you work with affinity tags that represent storage pools. Xsan
Admin organizes available LUNs into storage pools for you based on the performance
requirements of the chosen volume type.

Adding a storage pool to a volume increases available storage and also requires
Xsan Admin to stop the volume and unmount it. Adding storage pools is a quicker
way to expand a volume and doesn’t require defragmenting the volume to recover

Adding LUNs to a storage pool increases the size of an existing volume and can
improve performance by increasing the number of RAID controllers and data paths
between clients and storage. During the expansion, Xsan Admin stops the volume and
unmounts it from clients while it adds the new LUNs.