...does RAID stand for? RAID stands for Redundant Array of Inexpensive Drives. That is the original term. The latest is Redundant Array of Independent Disks. 1 2. When would we use RAID? RAID is used as enhanced storage space, storing the same data in different places. Thus redundancy. 2 3. Define the types of RAID’s? a) RAID 0: This technique uses the Striping technique but has no redundancy. It has no fault tolerance. It offers very good performance though. Good for a backup. RAID 0 can be on home computers.2,3 b) RAID 1: This RAID uses Disk Mirroring. It also uses 2 drives that duplicate the storage of data. There’s no striping. The read performance has been improved since either disk can be read. RAID 1 gives the best performance and fault tolerance. It can be on home computers. 2,3 c) RAID 5: This RAID stores Parity information, but not redundant data. It has a rotating Parity Array, addressing the write limitation in RAID 4. It uses 3 sometimes 5 disks for the array. This RAID is best used for multi-user systems in which performance is not critical. Parity is used to protect the data, so if one hard drive dies, the information that was on that particular drive will be on at least another drive.2,3 d) RAID 6: This RAID is similar to RAID 5, but includes a second Parity Scheme that’s distributed across different drives giving high fault and drive failure tolerance.3 4. Why is RAID 0 of any use if it offers no redundancy? RAID 0 works something like a RAID 5 but...
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...Computers, networks, and software are the heart and soul of the IT world today. Because of the availability of those systems, they are very vulnerable to malicious attacks and activity. It is of upmost importance that an organization takes security seriously and takes the proper measures to protect their systems. They can do this through a number of different ways, but one area of focus is through the authentication process and the related hardware and software to go along with it. Identification and Authentication Authentication is the process of the system or program recognizing the user and granting them access, which has been predetermined by access controls. It begins with two major parts; Identification and Authentication. Identification is the process in which the system recognizes the user and gives them access according to Abstract object that are controlled by the administrators of the files and systems. Privileges will be granted based on their user account having been verified. This process is usually a user ID. The system recognized the ID and knows the access right and privileges of that individual that have been verified. The Authentication begins once the user account ID has been identified. This is the process in which the user credentials are actually verified, meaning the specific attributes of their specific user account and authenticated and verified to make sure the access rights are correct. This process uses a password or some sort of credential such...
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...Rupani begins with a definition of several high-availability concepts, such as planned and unplanned outages, single points of failure, mean time between failures and interruptions, fault tolerance, and redundancy. He then provides an overview of several important high-availability technologies. RAID RAID technology is the most common method to provide data resiliency. With RAID (Redundant Arrays of Independent Disks), data is redundantly stored on multiple disks such that, should one disk fail, the data can still be reconstructed. RAID arrays typically provide a hot-swappable capability so that a failed disk can be replaced without taking down the array. There are several configurations of RAID. Most stripe data across multiple disks to achieve improved performance. Mirrored disks, used by fault-tolerant systems and designated as RAID 1, provide an entire copy of the database on a backup disk. The most common form of RAID in use today is RAID 5, which provides one additional disk and which stripes data and parity across disks. Since there is one extra disk, the data can be reconstructed should any one disk fail. There are several other forms of RAID designated as RAID 0, 2, 3, and 4, and combinations of these. Rupani describes each...
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...Kevin Wingate November 10, 2014 NT1110 – Computer Structure and Logic Research Project – Network Attached Storage A Network Attached Storage (NAS) device is a device connected to a network of two or more computer with the purposes of providing “community storage” of files and other data. As our society moves closer towards greater mobility the need to have mobile storage has increased. There are many types of storage devices, with various advantages and disadvantages to each of them; including Direct Attached Storage (DAS) and Network Attached Storage Devices. NAS devices are useful if all the computers on the network need access to the same files, DAS can only be accessed by the computer they are attached to (unless the computer grants access to another user. Most NAS devices contain multiple hard drives, which are connected by an internal server. There are many features of NAS devices. The speed of the network is dependent on the service available to the network and the number of users on the network. The capacity range of the network is depend on the hard drives contained in the device and the way it is setup. As with most servers or combination of two or more hard drives (Redundant Array of Independent Disks) RAID can be set up to maximize the use of the server and to protect the data. Also most NAS devices have software, which can be installed on client computers which allows the user to manage the device. The device has an IP address which also allows you...
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...Abstract Redundant Array of Independent Disks, universally known as RAID is a subsystem for disks by definition and as first coined in the year 1987 by David, Garth and Randy Katz at the University of California. Initially RAID was created to combine a number of cheaper drives in order to provide high capacity. However today RAID is designed for providing one of the most important, essential and looked-for feature in any system i.e. “fault tolerance” or “failover protection”. Fault tolerance increases the overall efficiency and reliability of the system. This short paper provides a pragmatic overview of RAID in general, the two methods used in RAID to enhance its reliability and performance, pros and cons associated with RAID and a contrast of RAID level 1 and RAID level 5 schemas on the basis of read and write actions. Introduction RAID has a different drive just for replacing the drive that has crashed. This spare drive is called hot spare. This drive can be compared to a spare part that is used during emergency. This spare drive must always be ready and the replacement of the failed part (drive) should be done straightaway. After replacing the failed drive with the hot spare drive it is required that the entire system knows that the spare drive is being used. In addition we should also take a backup of all the data, just in case the spare drive also fails. However, RAID rules the technology used in implantation of secure systems. Physical and logical arrays and disks...
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...Data Protection Proposal Lake Medical Hospital By: Frank Angelone 05/31/14 Lake Medical Services in this proposal I will inform you of the options. The Standard for using data protection is by using RAID. RAID stands for Redundancy Array of Independent Disks. What this system allows you to do from an owner’s perspective, is to store and process all of your network needs. Considering you are a hospital you need to protect your patient’s information. With this data protection system it will allow you to collect large amounts of data by combining hard drives into one. What the RAID system does is take many hard drives and appear in your network as one. There are three main standards of RAID. First is R.A.I.D. 0, second is R.A.I.D 1, and third is R.A.I.D. There is a fourth option we will discuss that I am proposing for you to use. If you would like another option this can be discussed, but first we will discuss the three main standards. First option of R.A.I.D. is 0. When using option 0 you need to have at least 2 hard drives. You may use more drives than to increase the speed of your network (Iomega, 2009). Also looking at the size of the network will determine how many drives will be needed to run the system. This option uses a method called striping (Iomega, 2009). Striping is when the data that is stored on the drive is spread across the disks on the drives. What this means is that every piece of data is split up into small segments...
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...NETWORK-ATTACHED STORAGE FOR SMALL COMPANIES Case: Design Foundation Finland LAHTI UNIVERSITY OF APPLIED SCIENCES Degree Programme in Business Information Technology Bachelor Thesis Autumn 2012 Jari-Pekka Koivisto Lahti University of Applied Sciences Degree Programme in Business Information Technology KOIVISTO, JARI-PEKKA: Network-attached storage for small companies Case: Design Foundation Finland Thesis in Degree Programme in Business Information Technology, 56 pages, 11 pages of appendices Autumn 2012 ABSTRACT This study focuses on finding the proper solution to create Network-attached storage (NAS) for a small company. This study was commissioned by Design Foundation Finland, aiming to improve the security and the management of the information. This research will be aiming to find the proper way to design and implement a network storage, which will be used as the main data storage within the company for creating an ideal solution for data maintenance, security and ease of access to all the data of the foundation. The outcome of the thesis is a solution, which is created from scratch, offering a design and implementation of an NAS in a small company with a relatively small budget. The case foundation is located in Lahti. The foundation was established in 2009, aimed to improve and support the education (of design), as well as research and development of design. Design Foundation Finland also has an own R&D group to improve the design of Finnish products in several...
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...HP 3PAR StoreServ Storage Concepts Guide HP 3PAR OS 3.1.2 MU2 Abstract This guide is for all levels of system and storage administrators who plan storage policies, configure storage resources, or monitor the storage usage of HP 3PAR storage systems. HP Part Number: QR482-96384 Published: June 2013 © Copyright 2007, 2013 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.21 and 12.212, Commercial 1 Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Acknowledgements Microsoft® and Windows® are U.S. registered trademarks of Microsoft Corporation. Oracle is a registered trademarks of Oracle and/or its affiliates. UNIX® is a registered trademark of The Open Group. Warranty To obtain a copy of the warranty for this product, see the warranty information website: http://www.hp.com/go/storagewarranty Contents 1 Overview..............................................................
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...Command Line Interface for Linux CLI PN 900-0024-00, Revision E April 23, 2003 User Guide Copyright ©2003 3ware, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical, photocopying, recording or otherwise, without the proper written consent of 3ware, Inc., 455 West Maude Avenue, Sunnyvale, CA 94085. Trademarks 3ware, the 3ware logo, Escalade, StorSwitch, TwinStor, R5 Fusion and 3DM are all registered trademarks of 3ware, Inc. All other trademarks herein are property of their respective owners. Disclaimer 3ware, Inc. assumes no responsibility for errors or omissions in this document, nor does 3ware, Inc. make any commitment to update the information contained herein. Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Command Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Ways to Run the CLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1) Interactive with command interface . . . . . . . . . . . . . . . . . . 4 2) Single command with output . . . . . . . . . . . . . . . . . . . . . . . . 4 3) Multiple commands through an input file . . . . . . ...
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...Step 1 User boots her computer and hears a sequence of six beeps. Step 2 a cause could be an expansion card has failed. Step 3 you would do a physical check and uninstall and reinstall any expansion cards that you have connected to the motherboard. When you do that restart the computer and see if you get that same beep sequence or any. Step 4 you should check run a test on all expansion cards.Step 5 once you ran many tests and you fixed to problem you then verify the computer is working. Step 6 you found that the expansion slots were a problem and you replaced them with new ones. Now your computer is working fine. Step 1 the user boot their computer and hear a sequence of ten beeps. Step 2 a cause could be by a damaged expansion card. Step 3 after pulling the cards out you still has a problem. Step 4 you then replace the motherboard and that should fix the problem. Step 5 you restart our computer and that the computer was fixed. Step6 you found the problem was your motherboard, you replaced the motherboard and the problem was fixed. Task 2 Step 1 you opened the internet and you can’t open this website. Step 2 cause could be you are not connected to the internet, the website is encountering problems or there might be typing error in the address. Step 3 try to open a regular site like Google to see if you’re encountering problems. Then you could look at your Ethernet cable to see if it’s connected to the computer. Last try to find the site using Google in case you’re having...
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...many varieties depending on if you build it yourself or purchase a vendor product. The speed is typically one gigabit Ethernet connection but this can be changed to multiple gigabit, 10 gigabit, fiber optic by adding a pci-e network card(s). Older parts can be used which may be limited to 10/100 megabit. If you need an exact answer for speed, simply look at the wiki on gigabit. The capacity range again varies; people have built 40 TB machines and other just have 2TB. With port replication and add-on hard drive controller cards there is hardly a limit on size. A board with 6 sata ports can be replicated (1 to 5 port) allowing for 30 drives to be attached, if 3TB drives were used in raid 50 that would be 72TB of storage. As far as fault tolerance, raid 50 is fairly stable if set up correctly, raid 10 has been touted as one of the best setups since more drives can fail at one time without data loss. All of those features can be used on typical NAS devices....
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...itself before publication. 7. To create a fourth primary partition on a basic disk, you must use the Disk Part utility. 8. To extend or shrink a partition on a basic disk, you must be a member of the Administrators or Backup Operators group. 9. The default partition style used by windows 7 on anx86 computer is MBR. 10. All digital signed drivers have undergone Windows Hardware Quality Lab testing. 1. RAID stands for, Redundant Array of Independent Disks. 2. We would RAID when we need to combining several hard disk drives into one logical unit. 3. A. RAID 0 is stripping it divides the information onto 2 or more hard drives speeding up the input and output of the device, B. RAID 1 is mirroring it provides redundancy by writing all data to two or more drives. C. RAID 5 does both stripping and mirroring. D. RAID 6 is redundancy and data loss recovery capability. It added an additional parity block, so it uses block-level striping with two parity blocks distributed across all member disks. 4. RAID 0 is steel used today because it speeds up your device and pending on what you do the...
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...1. What does RAID stand for? Redundant Array of Independent Disks. Source: Steadfast.com 2. When would use RAID? When experiencing disk IO issues, where applications are waiting on the disk to perform tasks. It also provides additional throughput by allowing you to read and write data from multiple drives instead a single drive. Source: Steadfast.com 3. Define the following types of RAID: RAID 0 (Striping) - RAID 0 is taking any number of disks and striping data across all of them. This will greatly increase speeds, as you're reading and writing from multiple disks at a time. An individual file can then use the speed and capacity of all the drives of the array. The downside to RAID 0 though is that it is NOT redundant, the loss of any individual disk will cause complete data loss. I would not recommend ever using RAID 0 in a server environment. You can use it for cache or other purposes where speed is important and reliability/data loss does not matter at all, but it should not be used for anything other than that. As an example, with the 5% annual failure rate of drives, if you have a 6 disk RAID 0 array you've increased your risk of data loss to nearly 27%. RAID 1 (Mirroring) - RAID 1 is generally used with a pair of disks, though could be done with more, and would identically mirror/copy the data equally across all the drives in the array. The point of RAID 1 is primarily for redundancy, as you can completely lose a drive, but still stay up and running off the...
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...Running Head: 123 Textiles 123 Textiles Disaster Plan Corey Lyman University of Phoenix – Axia College Disaster Plan There are many elements associated with the importance of network security. It is the responsibility of the network manager to supply proper security level access appropriately to employees. In assigning this security, they must consider the job duties of the employee and ensure that the employee as adequate access to do their job. In addition, the network manager must evaluate external threats and prevent unauthorized access from external sources. There are also many external issues that must be considered in network security, such as ecological aspects, and the difficulties associated with network systems. These issues cause worry for network manager in regard to data safety. Organizations depend on data in the network to maintain daily operations and privacy of data; therefore it is of a huge significance to maintain this kind of data safely. In addition, the data must be easily recoverable in the event of a disaster When creating a disaster plan for an organization, many considerations must be made. As we review 123 Textiles Corporation, one significant factor is that the organization operates in a high-crime area. In addition, the server for the organization is adjacent to a window; which presents a security risk as the server is visible from the outside. The organization had a recent burglary, and the server was stolen. A good solution to...
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...1. What does RAID stand for? Short for redundant array of independent or (inexpensive) disks. It’s a category of disk drives that employ two or more drives in combination for fault tolerance performance. http://www.webopedia.com/TERM/R/RAID.html 2. When would you use RAID? When trying to survive a drive loss without data loss and in many cases without any downtime. http://steadfast.net/blog/index.php/general/almost-everything-you-need-to-know-about-raid 3. Define the following types of RAID: a. RAID 0- (known as a stripe or striped volume) splits data evenly across two or more disks (striped) without parity information for speed. http://en.wikipedia.org/wiki/Standard_RAID_levels b. RAID 1- an exact copy (or mirror) of a set of data on two disks. http://en.wikipedia.org/wiki/Standard_RAID_levels c. RAID 5- (block-level striping with distributed parity) distributes parity along with the data and requires that all devices but one be present to operate. https://en.wikipedia.org/wiki/RAID#RAID_5 d. RAID 6- (block-level striping with double distributed parity) provides a fault tolerance up to two failed drives. https://en.wikipedia.org/wiki/RAID#RAID_6 4. Why is RAID 0 of any use if it offers no redundancy? It can be used to improve performance through concurrent access and/or create large logical disks out of multiple physical disks. 5. Why do you think that RAID 1 can be the most expensive? Why would people utilize it if it’s so costly? Raid 1 is the most expensive...
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