Lun Access To A Server; General Steps For Data Migration - HP StorageWorks MPX200 Solution Manual

• The Oracle application running on a HP-UX (UNIX) host accesses its data through a mount point
/home/oracle.
• The Apache Web Server application on a Linux (UNIX) host accesses its data through a mount
point /data/webinfo
Typically, you create a mount point on a volume. On Windows, volume refers to a drive letter (for
example, D:\ or F:\). On UNIX operating systems, a mount point may be on a volume managed
by a logical volume manager (Veritas or native), or a mount point may be directly on raw device
nl
(/dev/rdsk/c0t1d4).
You can create a volume either on a single physical disk or on multiple physical disks. For example,
in Windows, drive letter F:\ may span multiple physical disks (Disk2, Disk3, and so on). On UNIX,
a Veritas Volume Manager may have a volume /dev/vg-1/vol1 created on three physical disks:
/dev/rdsk/c0t1d2, /dev/rdsk/c0t1d3, and /dev/rdsk/c0t1d4.
The physical disk or a raw device is associated with a LUN. For example, in Windows, Disk2 is
LUN 5 on a storage array and Disk3 is LUN 6 on a storage array. In UNIX, /dev/rdsk/c0t1d2
is LUN 2 on a storage array and /dev/rdsk/c0t1d3 is LUN 3 on a storage array.

LUN access to a server

Multi-pathing software installed on the server typically manages multi-paths to a LUN. In a typical
SAN:
• A single storage array serves multiple servers and provides controlled access to the LUN, often
referred to as LUN presentation.
• Multiple servers and storage arrays are present. Server access to a storage array is often controlled
by name server zoning.

General steps for data migration

To perform a successful data migration, follow these recommended steps:
1. Create a data migration checklist.
each of the checklists, and
checklists for a specific data migration scenario.
2. Configure the MPX200 for migration. For detailed instructions, see
recommendations in
3. Migrate the data.
4. Adjust the Fibre Channel zoning in the Fibre Channel switches, and then update the LUN
presentation from the destination storage array to the server.
5. After data is migrated from one storage array to another storage array, do the following:
• Update the multi-pathing software on the server, if necessary.
• Adjust the mount point for the volume, if necessary. In most cases, volumes are discovered
automatically under Windows and UNIX (HP-UX, Linux, Solaris) systems configured with lo-
gical volume managers. For details, see
tion, page 183.
6. For record keeping, save the migration logs.
174 Data migration planning
"Inventory checklists" on page 175 provides an explanation of
"Checklist examples" on page 180 shows examples of completed
"Maximizing performance" on page 149.
Assigning LUNs to the MPX200 for data migra-
Chapter 4 and the