Session 3 Windows Platform Dina Alkhoudari. Learning Objectives Understanding Server Storage Technologies Direct Attached Storage DAS Network-Attached.
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Slide 1
Session 3 Windows Platform Dina Alkhoudari
Slide 2
Learning Objectives Understanding Server Storage Technologies
Direct Attached Storage DAS Network-Attached Storage NAS
Storage-Area Network SAN Identify main RAID levels Basic Disks vs
Dynamic Discs Implement main RAID levels using Windows 2008
Server
Slide 3
Understanding Server Storage Technologies - DAS Direct Attached
Storage A storage attached to one server only Ex: set of internal
hard disks within a server Feature: provides a single server with
fast, block-based data access to storage directly through an
internal or external bus Best Usage: servers that need good
performance and do not need enormous amounts of storage like (DNS,
WINS, DHCP servers) Limitations: DAS is directly accessible from a
single server only which leads to inefficient storage management In
Windows Server 2008: The main tool to manage DAS is Disk Management
console and Diskpart.exe command line utility
Slide 4
Understanding Server Storage Technologies - DAS
Slide 5
Understanding Server Storage Technologies - NAS
Network-Attached Storage A self-contained storage that other severs
and clients can easily access over the network It is a
preconfigured server that runs an OS Feature: simple to implement
and can provide a large amount of storage space to clients and
servers on a LAN Limitations: access to data is slower and
file-based as opposed to block-based Best Usage: in file servers,
Web servers and other servers that dont need extremely fast access
to data
Slide 6
Understanding Server Storage Technologies - NAS
Slide 7
Understanding Server Storage Technologies - SAN Storage-Area
Networks Are high performance networks dedicated to delivering
block data between servers and storage subsystems SAN is made up of
special devices including HBAs on the host servers, switches that
help route storage traffic, disk storage subsystems and tape
libraries Best Usage: servers that requires fast access to very
large amounts of data such as mail servers, backup servers,
streaming media servers, application servers and database servers
In Windows Server 2008: windows server 2008 include the Virtual
Disk Service (VDS) to expose disk subsystems and SAN hardware to
administrative tools in Windows like (SMfs, Storage Explorer, iSCSI
initiator, Disk RAID)
Slide 8
Understanding Server Storage Technologies - SAN
Slide 9
RAID Concept RAID: Redundant Array of Independent Disks A
technology that provides increased storage functions and
reliability Combining multiple disk drive components into a logical
unit
RAID 0 RAID-0 is known as data striping The data is broken down
into several smaller, equally sized pieces This process increases
I/O bandwidth by simultaneously accessing multiple disks It does
not offer any redundancy RAID-0 is ideal for high bandwidth
applications Creating RAID 0 in windows server 2008
Slide 12
RAID 0
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RAID 1 Disk Mirroring creating a single logical disk drive from
two physical disk drives All data written to the logical drive is
written to the two physical disk drives increases the performance
of reading and writing data provides full fault tolerant for a
single drive failure
Slide 14
RAID 1 Disk Mirroring
Slide 15
RAID 5 A Block-level striping with a distributed parity Needs
at least 3 physical disk drives Data is stripped across all disk
drives The parity is also striped across all disk drives In the
case of disk failure, a computation lost data stored in the failed
disk is performed mathematically Performing RAID 5 in windows
server 2008
Slide 16
RAID 5
Slide 17
Dynamic Disks vs. Basic Disks 1. Basic Disk A basic disk is a
physical disk that contains primary partitions, extended
partitions, or logical drives. on disks that use the master boot
record (MBR) partition style, you can create up to four primary
partitions per basic disk, or you can create up to three primary
partitions and one extended partition with unlimited logical
drives. on disks that use the GUID partition table (GPT) partition
style, you can create up to 128 primary partitions, and you do not
need to create extended partitions or logical drives.
Slide 18
Dynamic Disks vs. Basic Disks 1. Dynamic Disk Provides advanced
features that basic disks do not. The ability to create unlimited
number of volumes that span multiple disks, and fault-tolerant
volumes. Earlier versions of Windows (such as Windows NT, Windows
98, and Windows ME) cannot access dynamic disks. Dynamic disks are
compatible only with Windows operating systems. Basic disks are
automatically converted to dynamic when necessary
RAID 0+1 or RAID 1+0 RAID 0+1 or 01: a mirror of stripes,
essentially twin copies of a striped volume constructed by creating
RAID 0 sets and then mirroring them RAID 1+0 or 10: a stripe of
mirrors in which the data is striped across multiple mirrored sets.
constructed but first creating a series of mirror sets and then
building a RAID 0 set across the mirror set Although you cannot
create them in Windows, both of these solutions allocate 50 percent
of the disks for fault tolerance, and both offer excellent read and
write performance.
Slide 21
Configuring a Mount Point A mount point is a folder in a volume
that acts as a pointer to the root directory of another volume