Enterprise Data

Running head: ENTERPRISE DATA
Enterprise Data
Name of the Student
Name of the University
Author Note

1. Which of the following are NOT examples of storage virtualisation?
Describe the functionality of the ones that are examples of storage
virtualisation.
In this case the VMWare Workstation, Microsoft Hyper-V and Software Defined
Storage are not the examples of storage virtualization.
LUNs being provisioned from a disk array:
LUNs are used in thin provisioning (also known as virtual provisioning) for storage
area network (SAN) management. A virtual LUN is also sometimes called a thin LUN.
Direct Attached Storage:
The main functionality of Direct attached storage is in reference to dedicated storage
arrays attached directly to servers. It is used to distinguish DAS from networked storage
arrangements, like SAN or NAS devices.
RAID0:
The main functionality of the RAID0 is storing the same data in different places on
multiple hard disks to protect data in the case of a drive failure. However, not all RAID levels
provide redundancy.
2. Describe whether each of the following SAN configurations is
oversubscribed. Is this a bad thing?
Currently all the following SAN configuration are oversubscribed. This happened due
to the fact that multiple devices are connected to the same switch port for the switch use
optimization.

Oversubscription:
Oversubscription is not necessarily a bad thing; in fact, SAN admins have been doing
this for some time. For the typical Windows administrator who has graduated to virtualization
administrator, managing oversubscription may be a new skill.
3. Describe the primary differences between a NAS and a SAN
NAS is a single storage device which operates on data files, whereas SAN is a local
network of multiple devices which operate on disk blocks.
SAN connects to only those devices that have SCSI fibre channel and belong to the
server class. In contrast, NAS can connect the devices that exist in a LAN and able to utilise
protocol such NFS or CIFS.
In SAN the file system is handled by servers, whereas in NAS the head unit controls
file system.
Information is shared by a server-based operating system in SAN, which is why it
relies on the operating system. As against, NAS allow higher sharing particularly among OS
like UNIX and NT.
The backup and mirrors are made using blocks in SAN. Inversely, in NAS files are
used to generate backup and mirror.
4. Why can a SAN be divided into separate LUNs? Give an example of
what a LUN might be used for.
In a SAN fabric, LUN storage is essential to the configuration of the environment and
its performance. A LUN is a unique identifier given to separate devices, or logical units, so
they can be accessed by a SCSI, iSCSI or Fibre Channel protocol. LUNs are key to disk array