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This article mainly introduces "what's the difference between raid 01510". In daily operation, I believe many people have doubts about the difference between raid 01510. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "what's the difference between raid 01510". Next, please follow the editor to study!

The differences are: 1, RAID 0, stripe, poor security, no redundancy, the best performance; 2, RAID 1, mirror type, the highest security, providing data block redundancy; good performance; 3, RAID 5, is the best compromise between performance and data redundancy; 4, RAID 10, first do mirror and then do stripe, taking into account redundancy and performance.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

I. Overview of raid cards

1. DELL array cards (RAID cards)

RAID is the abbreviation of Redundant Array of Independent Disks in English and independent redundant disk array in Chinese. To put it simply, RAID is a combination of multiple independent hard drives (physical hard drives) in different ways to form a hard disk group (logical hard disk), thus providing higher storage performance and data backup technology than a single hard disk.

The different ways of forming a disk array are called RAID levels (RAID Levels).

The idea of centralized management: resource integration and management with unified standards

2. Basic functions:

When there is a large amount of data on the website, there is no room for a single disk. If you buy multiple disks and do not want to store data individually, you need to integrate all the hard disks into one large disk, and then put the data in the partition (virtual disk) on this large disk.

Another feature is that multiple disks can be put together to have redundancy (backup).

3. Features (compared with hard disk)

What they have in common: a disk group is like a hard disk, and users can partition it, format it, and so on. In short, the operation of a disk array is exactly the same as that of a single hard disk.

The difference: disk arrays store much faster than a single hard disk and provide automatic data backup. The function of data backup is that once the user data is damaged, the damaged data can be recovered by using the backup information, thus ensuring the security of the user data.

2. There are many ways to integrate RAID, mainly: RAID 01510.

With the RAID card, the general disk will be inserted into the raid card, rather than into the motherboard.

Advantages: both reading and writing are fast

1. Enterprise application

Examples of enterprise applications with different RAID levels: select RAID according to the needs of data storage and access

Internet company servers generally buy raid cards (with their own motherboard and independent RAID cards), and raid cards are also cached.

1. Main performance ranking:

Redundancy from good to bad: raid 1 raid 10 raid 5 raid 0

Performance from good to bad: raid 0 raid 10 raid 5 raid 1

Cost from low to high: raid 0 raid 5 raid 1 raid 10

2. The selection of RAID type

Single server, very important, not many disks, system disk raid1

Database / storage server, master library raid10, slave library raid5/raido (for maintenance costs, raid10)

Web server, if not too much data, raid5,raid0 (single disk)

There are multiple monitoring / application servers raid5,raid0

2. RAID 0 1 5 10 simple difference

3. Elaborate on RAID 0 1 5 10

1 、 RAID 0

Also known as Stripe or Striping, it represents the highest storage performance of all RAID levels.

RAID 0 improves storage performance by distributing continuous data to multiple disks, so that the system can execute data requests on multiple disks in parallel, each disk performing its own part of the data request.

This parallel operation on data can make full use of the bandwidth of the bus and significantly improve the overall access performance of the disk.

2 、 RAID 1

Also known as Mirror or Mirroring, its purpose is to maximize the availability and repairable of user data.

RAID 1 operates by automatically copying 100% of the data that the user writes to the hard disk to another hard disk.

Due to 100% backup of stored data, RAID 1 provides the highest data security of all RAID levels. Similarly, because 100% of the data is backed up, the backup data accounts for half of the total storage space, so Mirror has low disk space utilization and high storage costs.

Although Mirror can not improve storage performance, because of its high data security, it is especially suitable for storing important data, such as server and database storage.

3 、 RAID 5

A storage solution that takes into account storage performance, data security and storage cost.

RAID5 does not back up the stored data, but stores the data and the corresponding parity information on the disks that make up the RAID5, and the parity information and the corresponding data are stored on different disks respectively. When a disk data of RAID5 is damaged, the remaining data and corresponding parity information are used to recover the damaged data.

RAID 5 can be understood as a compromise between RAID 0 and RAID 1.

RAID 5 can provide data security for the system, but the degree of protection is lower than that of Mirror and the utilization of disk space is higher than Mirror.

RAID 5 has a data read speed similar to that of RAID 0, but with one more parity information, and writing data is slightly slower than writing to a single disk. At the same time, because multiple data correspond to a parity information, the disk space utilization of RAID 5 is higher than that of RAID 1, and the storage cost is relatively lower.

4 、 RAID0+1

As its name suggests, RAID 0room1 is a combination of RAID 0 and RAID 1, also known as RAID 10.

RAID 0room1 is a solution that combines storage performance with data security. It not only provides the same data security as RAID 1, but also provides storage performance similar to RAID 0.

Because RAID 0room1 also provides data security through 100% backup of data, RAID 0room1 has the same disk space utilization as RAID 1 and has a high storage cost.

The characteristics of RAID 0room1 make it particularly suitable for fields where a large amount of data needs to be accessed and at the same time has strict requirements for data security, such as banking, finance, commercial supermarkets, warehouses, various file management and so on.

At this point, the study on "what's the difference between raid 01510" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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