EMC CX700 Planning Manual page 102

Planning File Systems and LUNs
Completing the Application and LUN Planning Worksheet
Application. Enter the application name or type.
File system, partition, or drive. Write the planned file system,
partition, or drive name here.
With a Windows operating system, the LUNs are identified by drive
letter only. The letter does not help you identify the disk
configuration (such as RAID 5). We suggest that later, when you use
the operating system to create a partition on a LUN, you use the disk
administrator software to assign a volume label that describes the
RAID type. For example, for drive T, assign the volume ID RAID5_T.
The volume label will then identify the drive letter.
RAID type of LUN. This is the RAID Group type you want for this
file system, partition, or drive. The features of RAID types are
explained in Chapter 2. For a RAID 5, RAID 1, RAID 1/0, and RAID 0
Group, you can create one or more LUNs on the RAID Group. For
other RAID types, you can create only one LUN per RAID Group.
LUN ID. The LUN ID is a hexadecimal number assigned when you
bind the disks into a LUN. By default, the ID of the first LUN bound
is 0, the second 1, and so on. Each LUN ID must be unique within the
storage system, regardless of its Storage Group or RAID Group.
The maximum number of LUNs supported on one host bus adapter
depends on the operating system.
Disk space required (Gbytes). Consider the largest amount of disk
space this application will need, and then add a factor for growth.
If sometime in the future, you find that you need more space for this
application, you can expand the capacity of the LUN by adding other LUNs
to it. For information on expanding LUNs, refer to the Navisphere Manager
online help or the EMC Navisphere Manager Administrator's Guide.
Server hostname and operating system. Enter the server hostname
(or, if you don't know the name, a short description that identifies the
server) and the operating system name, if you know it.
5-8 EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide