RAID stands for Redundant Array of Inexpensive Disks or Redundant Array of Independent Disks. It is a technology for saving or storing data in multiple places like hard disks to protect data from drive failure, and it also increases the reliability of data storage.
RAID works by querying data into multiple disks. It allows input/output operations to overlap in a balanced way. The software that performs RAID functionality and controls to drive can either be located on a separate hardware RAID controller or simply be a drive. You can save data in case of a crash by using the RAID controller.
RAID system can be used with a number of interfaces like SATA, SCSI, or FC (Fiber Channel). The RAID system is consist of two or more drives working in parallel. It may be a hard disk but there is also a trend of using technology for SSD (Solid States Drive).
There are different RAID levels, however, many variations have developed. These RAID levels are optimized for specific situations.
In the system of RAID 0, the data can be split into blocks and spread the split data into multiple disks like a hard disk. It only strips the data, with no mirroring or parity. It offers the best performance without fault tolerance.
The data will be lost in case of any drive failure because stripping divides or spreads the data among all drives in the set.
RAID 1: Mirroring
RAID 1 is known as Mirroring, as the name declares that it mirrors the same data into two disks. This array basically needs 2 disks. It increases the read performance over 1 disk up to 2x. In case of 1 drive failure, the data can be restored by using disk 2. It is a good choice for high availability and high-performance application.
RAID 5: Striping with parity
RAID 5 consists of block-level striping distributed parity. It is the most common and secure level. It requires at least 3 disks and can work up to 16 disks. The data parity is written on one drive. It distributes parity information on all disks among drives, requiring all drives but at least one drive to be present to operate. The striping in the system allows users to reconstruct data in case of 1 drive failure.
RAID 6: Striping with double parity
RAID 6 is like RAID 5, but it writes parity information on 2 drives. It is a scheme that works by placing data on multiple disks. It also allows input/output I/O operations to overlap in a balanced way and improve performance. It requires 4 disks minimum. It minimizes the problems mostly associated with RAID 5.
RAID 10:Combining striping and parity
RAID 10 is also known as RAID 1+0, it combines disk mirrors and disk striping to protect and save data. At this RAID level, it is possible to combine the advantages of RAID 1 and 0. It offers high performance at a much higher cost. It requires a minimum of 4 disks. As long as one disk in each mirrored pair is functional, the data can be retrieved or recovered.
Buying a new computer can be a fearful event. But, nobody should worry, since great guidance can smooth the way. Read on to find out how smart computer shoppers can get the machine they need.
Look around for individuals who give away desktop computers. Many people are getting tablets or laptops instead, and decide to sell desktops. These computers are typically in good condition, but make sure the computer is working well before you make an offer.
Choose the components carefully when it comes to assembling a desktop computer yourself. Certain processors will only work with certain motherboards. Some RAM units will only be compatible with some motherboards. When buying components, check for cross-compatibility. This will save you a lot of time, money, and headaches when building your own desktop computer.
Measure how much space you have in the area you plan to locate your desktop computer. Desktop computers come in all different sizes, depending on model and brand. Some have a smaller frame, and others are very tall. You know where the computer has to fit so make sure you buy according to that size.
To make sure your computer is most efficient and to make sure your fan is properly cooling the components, dust the inside of the computer every week. The case can easily be removed so you can use compressed air to spray out the dust. That will clean the computer and help the fan to work.
Look online for reviews before purchasing a computer. All the available choices can be daunting, but reading a pick list of an editor, or some reviews can help you better determine what computer is best for you.
If you want to buy a new Mac, but use PC software, Parallels for Mac can help. It’s the perfect software to use when you need to use your Mac to run a PC system event. This will let you run your PC programs. Do note that you must buy a PC operating system along with parallels to get this set up going.
Create a list of all the things you will do on your new computer. The type of computer you need will depend on the type of tasks you perform on a regular basis. A desktop built to complete simple tasks is built much differently that a computer designed for gamers.
To transfer some large video files, you will need a desktop computer with a DVD optical drive that is writable. A given CD drive might not be sufficient for large files. You will need the space a DVD offers. It costs a bit more, but the storage space is worth it.
There are many changes in the computer world that you may not know of. Most computer stores offer a basic model for around $400.00. Try to get a warranty and make sure the retailer is reliable.
If you are someone interested in the going green movement, there is a computer called a mini PC. Mini-PCs don’t use much electricity, but have a good enough processor that you can accomplish tasks. If you check your email, surf online, visit Facebook, create documents and little more, then this is the machine for you.
Keep the peripherals in mind as you look for a new computer. You will require all the basics like a computer monitor, a great mouse and a keyboard. You’ll likely also want a printer, and make sure your desktop has connections for broadband Internet and WiFi. Which other types of hardware could you need?
If you’d like to upgrade a desktop computer before you buy it, ask if this is possible as you buy the machine. This will make it much easier for you and often save you money.
When buying a computer used, don’t even think about the original factory warranty. Most manufacturers won’t transfer warranties from one person to another. While you can save a lot of money on a used computer, it’s best to not focus on the original warranty when buying it.
Be wise when you shop for a great deal. Yes, computers can be very pricey. You’ll see some amazing offers out there, though, but you must know precisely what you are after to get a good one. Make sure you’re aware of its hardware. This will determine how well it will perform.
People used to buy computers with all the peripherals in a bundle. Avoid doing this. Computer-specific monitors are no longer in vogue since so many people are purchasing flat screen tvs and monitors for their desktops. Know that if you have a keyboard and mouse, they’ll still work.
Hard drives come in two varieties. HDD are traditional drives, while SSD are faster, newer options. The SSD is not going to store as much information and it does cost more, but it is much higher tech and does provide more rpm than that standard drives.
When you buy a used computer, do know that a lot of manufacturers do not allow warranties to be transferred. This is significant because you will be responsible to get the computer repaired should something go wrong. Make sure it is a solid financial decision.
Are you looking for a specific operating system? If you are a Windows 7 fan, you may not necessarily like Windows 8. Take some time to see what operating system is run on any computer that you want to purchase, and make sure the OS you get is one that is easy for you to use.
If the initial start up time of a computer is a concern for you, look for SSD drives in some of the newer models. SSD drives contain operation systems and have apps that can start a computer up in seconds. You should also have a large traditional HDD, so that your files are backed up on a separate drive.
Those who lack computer shopping experience probably dread the thought of searching for a machine. If you put this advice to good use, you are bound to have a better shopping experience. No one should have an obsolete or inferior desktop computer.