100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
Previously searched by you
Summary RAID Level Project.docx ITC 3306 RAID Levels Columbia Southern University ITC 3306: Operating Systems RAID Levels What is RAID? RAID stands for Redundant Array of Independent Disks which is a storage technology that creates a data loss fail-safe$7.49
Add to cart
Summary RAID Level Project.docx ITC 3306 RAID Levels Columbia Southern University ITC 3306: Operating Systems RAID Levels What is RAID? RAID stands for Redundant Array of Independent Disks which is a storage technology that creates a data loss fail-safe
0 view 0 purchase
Course
Csu
Institution
Columbia Southern University
RAID Level P ITC 3306 RAID Levels Columbia Southern University ITC 3306: Operating Systems RAID Levels What is RAID? RAID stands for Redundant Array of Independent Disks which is a storage technology that creates a data loss fail-safe by merging two or more hard disk drives into one inter...
raid level projectdocx itc 3306 raid levels columbia southern university itc 3306 operating systems raid levels what is raid raid stands for redundant array of independent disks which is
Written for
Columbia Southern University
Csu
All documents for this subject (454)
Seller
Follow
helperatsof1
Reviews received
Content preview
ITC 3306
RAID Levels
Columbia Southern University ITC
3306: Operating Systems
RAID Levels
What is RAID?
RAID stands for Redundant Array of Independent Disks which is a storage technology
that creates a data loss fail-safe by merging two or more hard disk drives into one interconnected
storage unit. According to authors McHoes & Flynn (2018), RAID technology was proposed by
researchers at the University of California to emphasize the scheme’s improved disk performance
and reliability (p.237). RAID is based on the idea that several small-capacity disk drives are
superior to few large-capacity disk drives because the device can access the requested data from
several drives simultaneously by spreading the data through several smaller disks (McHoes &
Flynn, 2018). Due to design and architecture of RAID, in case if there is disk failure, the
recovery of data is guaranteed by redundant disk capacity (Garg & Verma, 2017). RAID consists
of seven levels, level 0 through 6 but four commonly used are 0, 1, 5 and 6 (Garg & Verma,
2017).
RAID 0
This level distributes the data evenly over all available drives, resulting in very high read
and write performance but offering no additional redundancy at the same time. RAID level 0 is
not considered as a true member of RAID family because it is the only level that uses data
striping without parity and doesn’t provide error correction (McHoes & Flynn, 2018). The
purpose is to speed up performance as organizing data in such a way where it allows faster
reading and writing of files (Daniel, 2020).
, The benefit of RAID level 0 is data is stripped into multiple drives and disk space is fully
utilized. The diagram shows how data is distributed into blocks on two disks, example block 1
and block 2 as second one. As shown in diagram below, when the OS issues a read command for
first strips, data can be transferred in parallel and that’s how it improves system performance. It
increases speed and space both so you can back up more files faster. Since the request can be
handled in parallel for number of strips, it reduces the transfer time (Garg & Verma, 2017).
Block 1 Block 2
Block 3 Block 4
Block 5 Block 6
Block 7 Block 8
Disk 1 Disk 2
RAID 1
RAID level 1 uses data striping just like RAID level 0 but the difference between two is
in RAID 1, each logical strip is mapped to two distinct physical disks. Basically, it mirrors the
disk that contains the same data, meaning every disk in the array has a copy disk containing same
information (Garg & Verma, 2017). Author Taneja has mentioned in his article, “RAID 1, also
known as mirroring, is essentially where you have two disk drives and whatever you put on disk
one, you simultaneously put on disk two. The idea is that if one of those two disks dies, then you
have the other disk that is still working and therefore you achieve data availability
improvements” (Taneja, 2009). The information is replicated from one drive to another every
time you insert information.
One of the biggest advantages of using RAID 1, is it is the safest option for your data. If
in case one drive is lost, the same exact data still exists in the other drive and takes no time to
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller helperatsof1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.49. You're not tied to anything after your purchase.
