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"The most common software implementation of RAID is the built-in RAID software that comes with Windows 2000, 2003, and 2008 Server."
~Mike Myers CompTIA A+ Guide to Managing and Troubleshooting PC's Third Edition~
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∙ 12y ago
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Which volume provides fault tolerance?
raid5
What is the difference between raid4 and raid5?
Both the RAID levels perform block level striping. How ever the difference is in parity bottleneck. Hence raid5 preferred over raid4.
What does a RAID5 level mean in computer networking?
RAID5 level in computer networking means to combine disk drive components. RAID, or Redundant Array of Individual Disks, have many different levels like RAID1, RAID2, and so on.
Which method of fault tolerance is least expensive per MB of storage disk duplexing or disk striping with parity?
has to be raid 5. raid5 with the parity will consume about 1/3 of the disk space but will give just about the highest level of fault tolerance. raid0 - disk striping - will give you the full disk space but no fault tolerance raid1 - disk splitting/ duplexing - will give you full redundancy but will cost 50% of your disk space raid5 - parity - will do block-level striping with parity data , disk space cost about 30%, redundant
Which RAID level provides the largest percentage of usable disk space?
RAID0 as it is just striping multiple drives to function as a single unit. For example, 4x2TB drives in a RAID0 would render a single drive approximately 8TB in size without overhead/formatting/etc. With formatting, the drive would be around 7.5TB (depending on which drives and host controller is being used). RAID0 is also the fastest RAID, however, it offers ZERO in the way of protection. If one drive fails, you lose all your data. That is why people tend to use RAID5 in a three or more disk array because it offers fault tolerance of one drive failure, which is usually all you need. However, even with RAID5, I have lost entire volumes by two simultaneous drive failures (the odds are astronomical). If you want protection from two disk failures, RAID6 is a newer technology that offers dual disk protection, however it uses storage space less efficiently than RAID5. To answer you question, RAID0 is the fastest and provides the most usable disk space, but has NO fault tolerance.
A company employee has very important data on a computer What RAID level should be used if the criteria include that data be written and read simultaneously and that all data be duplicated using a mi?
Mirroring is the method it is used. This is commonly in the specifications of RAID1, RAID5, RAID10, RAID1+0, RAID15, and others. RAID is commonly used to designate RAID (Redundant Array of Independant Disks) setups, but RAID is not technically recognized as a specification, and not all RAID types and enumerations (such as 15) are even recognized as valid designations. RAID may also not involve data redundancy or mirroring at all, such as in Striping (RAID0, RAID2, RAID3, RAID1+0, etc.)
How Storage Area Network differs from RAID?
Those two technologies have nothing incomon except for the fact that both address mass storages. RAID is a technology to span data over multiple disks to either gain more speed (seldom e.g. RAID0) or gain redundancy so that the system remains functional when one of the mass storages fail (e.g. RAID1 or RAID5). SAN means that there is a dedicated network instead of a local bus connecting the hostadapter to the storage. These networks use often similar protocol as on a local buses (e.g. iSCSI). Data is not aqured on a file per file base like in a server instead the host requests the specific blocks he would like to read. Advantages of a SAN may be fast switch over of mass storages from one Node to an other (storage failover if a node fails), storage sharing (one big disk [might even be a RAID system] is split up into two or more "virtual" disks which are then handeled by the respective node) or a centralized fast access for backup storages. Important thing to know is: both technologies may be (and are often) combined to get the best of both worlds.
How do you replace a harddrive in a raid5?
The simple answer is depends. You will need to locate a drive is similar to the failed one. It must be at least the same size or larger. Once you have installed it, boot up the machine and look for the post screen for the raid controller. There should be a button combination like Control-Z to get into the raid management screen. Once in, your new drive should appear in the disk menu. It probably will show it as a failed drive. Select initialize and then rebuild. If all goes well, your new drive should rebuild in a few hours. Most of the time you can reboot your machine and boot into the OS. The raid will rebuild while running. Keep in mind that there will be a lack of performance at this time. Avoid running any disk intensive apps.
Can you add another drive to a raid 5?
Do you mean add a disk to an already existing raid array, or can you have more than the 3 disk minimum? Either way, yes you can, though I find if you already have raid 5 setup with 3 disks and you want to add another one you are better off starting it all over from scratch again. As far as I can remember, I may be wrong, but all the disks have to be equal. You cant have a three 40GB drives at 5400rpm and then add in a new drive off 120GB at 7200rpms. And are you using a raid 5 hardware option or software option. If your doing it via hardware you may need to upgrade your disk controller. And dont forget your going to have convert your new disk when you get it. Drives are usually basic, raid5 wont work on a basic disk. Actually you can add disparaging disks to an array but you'll only get the capacity of the existing disks in the array - therefore in the above setup, adding the 120Gb@7200rpm wouldn't give you the capacity of the 120Gb, only an additional 40Gb.
How many RAIDS are available for fault tolerance methods?
RAID (Redundant Array of Inexpensive Drives) is the technology developed to decrease risk involved with the usage of individual disks for Storage. RAID adds realibility & provides performance in Read methods. Well Known RAID Levels are 1. RAID0 - Striping, 2. RAID1-Mirroring, 3. RAID2 - Striping at Bit levelusing Errorcorrection code on disks, 4. RAID3 - BYTE Level striping with parity disk, 5. RAID4 -Block Level striping with Dedicatedparity disk, 6. RAID5 - Striping at Block level with Distributed Parity, 7. RAID6 - Block level striping with Dual Distributed Parity.All RAID levelsenable Fault Tolerant storage volumes except RAID0.
What are the advantages of using a LAN?
LAN Advantages: -Workstations can share peripheral devices like printers. This is cheaper than buying a printer for every workstations. - Workstations do not necessarily need their own hard disk or CD-ROM drives, which makes them cheaper to buy than stand-alone PCs. - User can save their work centrally on the network's file server. This means that they can retrieve their work from any workstation on the network. - Users can communicate with each other and transfer data between workstations very easily. - One copy of each application package such as a word processor, spreadsheet etc. can be loaded onto the file and shared by all users. -Cost. Individually licensed copies of many popular software programs can be costly. Networkable versions are available at considerable savings. -Shared programs on a network allows for easier upgrading of the program on one single file server, instead of upgrading individual workstations. -Speed. Sharing and transferring files within Networks are very rapid. Thus saving time, while maintaining the integrity of the file. LAN Disadvantages: - Networks are difficult to set up and need to be maintained by skilled technicians. - If server develops a fault, users may not be able to run the application programs. - A fault in the network can cause user to lose the data. -If the network stops operating then it may not be possible to access various computers. - It is difficult to make the system secure from hackers, novices or industrial espionage. - Decisions on resource planning tend to become centralized. - Networks that have grown with little thought can be inefficient in the long term. -As traffic increases on a network the performance degrades unless it is designed properly. - The larger the network, the more difficult it is to manage.
Which RAID level stripes data across multiple drives to improve performance?
Every RAID level stripes data across multiple drives, which improves performance compared to using a single disk. RAID 0, RAID 1, RAID 1+0, RAID 5, RAID 6, etc. all have better performance than a single disk. Other than RAID 0, all other RAID levels provide fault tolerance. RAID 1, RAID 1+0, RAID 5, RAID 6, etc. all have fault tolerance.
