Computers: Iscsi and Disk Management Disk Essay

Submitted By isaacwilliams222
Words: 3869
Pages: 16
Open Document
Storage Facts
Data storage and access is a primary function of a network and selection of the right storage strategy is critical. The following table describes the options for server and network storage.
Method
Description
Direct Attached Storage (DAS)
Direct Attached Storage (DAS) uses storage devices that are connected directly to the server, either internally or contained within an external storage cabinet. Hard disk drives (typically SCSI or possibly SATA disks) are connected to the server through a host bus adapter (HBA).
DAS provides a low-cost, high-performance storage solution.
Data is saved to the storage device using block-level writes. This is faster than writing data as a file.
Storage devices are typically controlled by a single server, so that all access to the storage must go through the server.
If the server fails, access to the storage devices is lost.
Multiple servers can share the storage device, but multiple server access is typically limited to a clustered configuration to provide access to the data when one server is unavailable.
Network Attached Storage (NAS)
With Network Attached Storage (NAS), external storage devices are connected to the network, sharing the network with servers, workstations, and other devices. Client devices access the NAS device to read and write files in the same way that clients access files on a file server.
A NAS device is typically a pared down file server consisting of:
A storage enclosure with terabytes of storage space.
A motherboard (logic board).
One or more network interface cards. Multiple interface cards allow you to perform adapter teaming.
A minimal network operating system.
NAS devices use file transfer, such as Server Message Block (SMB) for Windows clients, to read and write files from the NAS device. File transfer operations are slower than block-level operations.
Storage Area Network (SAN)
A Storage Area Network (SAN) connects multiple servers with multiple external storage devices through a dedicated network. With a SAN:
Storage devices and servers are connected to the private storage area network. Client computers are not connected to the SAN, but communicate with the servers to access files from the storage devices.
All of the devices that connect servers and storage together are called the SAN fabric.
Each server is configured with the storage units on the storage devices that it can access. You can configure multiple servers for each storage unit, or multiple storage units for each server.
Servers are connected to the SAN through an HBA. For redundancy, you can use multiple HBAs to connect the server to the SAN.
On servers, define virtual partitions or virtual disks called Logical Unit Numbers (LUNs). LUNs appear to servers as local disks.
Special networking protocols allow servers to send block-level read and write operations to the storage devices.
Performance is similar to data access from direct attached storage, but with greater distances and shared storage.
When implementing a SAN with Windows Server 2008 or 2008 R2, devices must support the Virtual Disk Specification (VDS).
Partition Style
Description
Master Boot Record (MBR)
MBR is the traditional partitioning method. With MBR, you can have:
Up to 4 partitions
A maximum of 2 TB per partition
With MBR, partitioning information is often stored in hidden locations on the disk or even within the operating system. These locations might vary from vendor to vendor.
GUID Partition Table (GPT)
GPT is a newer partitioning method. With GPT, you can have:
Up to 128 partitions (Windows restriction)
Disks over 2 TB in size
With GPT, partition information is stored on the disk in well-documented locations. Each partition is identified by a GUID number. GPT also provides redundancy for the partition table.
You define storage areas on a disk by creating volumes. The way that volumes are handled depends on the disk type, either basic or dynamic.
Show More

Related Documents: Computers: Iscsi and Disk Management Disk Essay

Nt1330 Unit 3 Assignment 1

Controller. The Domain Controllers provide the DNS and DHCP services in addition to Active Directory authentication. An Identity Management server is hosted on a Red Hat Enterprise Linux 7 server which provides cross realm user authentication. The same server also hosts the network storage locations using the Samba service. The Domain Controllers and Identity Management server are configured to engage in a Forest level transitive trust. Three client machines join the servers with a Windows 7 client…

Words 661 - Pages 3

Nt1330 Unit 3 Essay

Windows Server configurations, including Active Directory to satisfy organizational requirements. Active Directory is a replicated, distributed, centrally managed, directory database that is used to store, organize, locate, and authenticate users, computers, services, applications, and other resources on a network. These resources are stored in the directory database as objects and properties. Active Directory is built on top of standards for Lightweight Directory Access Protocol [LDAP] and the Domain…

Words 1760 - Pages 8

The Roles In The Add Roles Wizard Fall Into What Three Basic Categories?

emulating a physical computer. A. virtual machine B. virtual server C. terminal machine D terminal server Answer: B Applications such as Microsoft Virtual Server 2005 and the Windows Server virtualization technology in Windows Server 2008 make it possible for a single computer to host multiple virtual machines, each of which runs in a completely independent environment. 4. The Windows Server 2008 paging file is __________ times the amount of memory installed in the computer by default. A. 1.5 B.…

Words 3790 - Pages 16

Comptia Server + Essay

CompTIA Server+ (2009 Edition) Certification Examination Objectives DRAFT INTRODUCTION The CompTIA Server+ (2009 Edition) certification is an international vendor neutral credential. The Server+ exam is a validation of “foundation” level server skills and knowledge, and is used by organizations and IT professionals around the globe. The skills and knowledge measured by this examination are derived from an industrywide Job Task Analysis (JTA) and were validated through a global survey in…

Words 2916 - Pages 12

Domain Connect Essay

support services that enable administrators to deploy applications in several different ways. • One of the primary considerations in the enterprise network design process is what the users of the network need to do with their computers. • The users need computer programs or applications designed to aid them in the performance of specific tasks. Applications Accessing File and Print Resources Accessing Applications running on a Single Application Server Accessing Application Server/Database…

Words 3228 - Pages 13

Essay on Sun Cloud Computing

Sun Cloud Computing |  Table of ConTenTs Table of ConTenTs Cloud Computing at a Higher Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Why Cloud Computing?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Clouds: Much More Than Cheap Computing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 IT Efficiency on a Whole New Scale. . . . . . . . . . . . . .…

Words 8300 - Pages 34

Five Applications And Tools Pre-Loaded On The Tfttwindows01 Server Desktop

1. Name at least five applications and tools pre-loaded on the TargetWindows01 server desktop, and identify whether that application starts as a service on the system or must be run manually. WINDOWS APPLICATION LOADEDSTARTS AS SERVICE Y/N 1. tftpd32 Starts as a service 2. FileZilla Server Interface- The interface does not start as a service and must be ran manually 3. Wireshark – Does not start as a service and must be ran manually 4. Nessus Server Manager – Does not start as a service and…

Words 11873 - Pages 48