Apple Xsan 1.0 - Manual (Page 27)

Chapter 2 Setting Up a Storage Area Network 27
Connecting Computers and Storage Devices
Before you set up your Xsan SAN, connect client computers, controller computers, and
storage devices to the SAN’s Fibre Channel and Ethernet networks. Make sure your
networks meet the requirements summarized under “Fibre Channel Fabric” on page 19
and “Ethernet TCP/IP Network” on page 19.
Preparing LUNs (RAID Arrays and Slices)
Xserve RAID systems usually come preconfigured with two RAID 5 arrays, one on each
side (on each controller). So, out of the box, each Xserve RAID provides two LUNs. If this
suits your needs, no other preparation is needed.
If you want to set up some other combination of RAID arrays or slices, you need to do
so using the RAID Admin utility before you can add the resulting LUNs to your SAN’s
storage pools. For help using RAID Admin, see Using RAID Admin 1.2 and Disk Utility
(available at www.apple.com/server/documentation). For information on choosing a
RAID scheme, see “Choosing RAID Schemes for LUNs” on page 23.
Note: You don’t need to use Disk Utility to format arrays or slices for use with Xsan. The
LUNs are labeled and initialized when you add them to a storage pool using Xsan
Admin. After they are labeled, the LUNs can’t be viewed or modified using Disk Utility.
Be sure to create arrays of similar size if you plan to combine them into the same
storage pool. For more information, see “Assigning LUNs to Storage Pools” on page 24.
LL0192.book Page 27 Thursday, July 29, 2004 5:20 PM