Manualshelf

Product specifications

ManualsBrandsQlogic ManualsHome building and DecorMPX200
11121314151617181920
1–Getting Started
Relationship Between Application Data and Physical Storage
1-2 ISR654605-00 A
Relationship Between Application Data and
Physical Storage
Successful data migration requires that you understand the relationship between
the application data and the physical device (LUN).
Typically, the application accesses the data using a mount point. For example:
The Windows SharePoint application accesses its data through a mount
point F:\Sharepoint.
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 access 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 (/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 as LUN presentation.
Multiple servers and storage arrays are present. Server access to a storage
array is often controlled by name server zoning.
NOTE:
UNIX operating system in this discussion refers to HP-UX, Linux, Solaris,
and AIX.