How Do I Do Hard Disk Hot Standby? What is a hot standby?

How do you do hard disk hot standby?

It is recommended to have 3 hard disks, one hard disk is the system disk, and the other 2 hard disks are RAID1, and the data is stored on RAID1. As you asked, there is likely to be a problem in the future, the problem of data, as long as there is a big problem, if the data is particularly important, it is recommended that you do not care about the money to buy an extra hard disk, in addition, it is best to do RAID 2 hard disks are exactly the same, including model and capacity, it is best to buy 2 at the same time. In this way, it is safe and convenient, and the system does not have to be rebuilt, but the budget is a little more.

Two hard disks Raid1, three hard disks Raid5, four hard disks Raid10, five hard disks Raid6, and more than six hard disks should consider the problem of hot standby.

It is very troublesome to do hard disk hot backup, in fact, it is very convenient for you to buy a RAID card now, although it is not as good as "independent redundant disk array", but it is still a very practical ......

It is not necessary to buy a RAID card.

Some motherboards have a half-load RAID on their own

To do hot standby, it depends on how many disks you have, and two are raid1

Three blocks on RAID5 and 4 blocks on RAID5

Anyway, you can't do raid0 to do raid, depending on your needs, you can check different raid levels, the effect is different.

It's too general,Do hot pare need card or controller support,Different hardware,The interface and operation are also different,LSI's directly click on the disk,A menu will appear,Click make hs,Then save,That's it。

This is called dual-machine hot standby. Dan shooting.

The two servers complete the same application, and only one of them provides this application at a certain time, and the other is idle. If one of them fails, it will be immediately transferred to the other for use.

Disk array: Multiple hard disks, combined as a disk, are used as a whole and provide data redundancy through RAID technology, forming different types of disk applications, which can improve data access speed and security. There are many types of RAID, and the specific definition can be found online.

Add a hard disk and set it as global hot standby.

Your RAID 5 is made of several hard drives. If you have already made it with four pieces, you don't need to add it.

There are several ways to do it.

If you do RAID 5 directly, you can use the space you have;

Do RAID5 + HOTSPARE, that is, 4 blocks do RAID5, one is a hot spare, and the effective capacity is 900G;

Do RAID10 + HOTSPARE, that is, 4 RAID10, one is a hot spare, and the effective capacity is 600G;

The first option has the largest capacity, and the third option has the highest security and higher performance than the first.

If you want to do dual-node hot standby, you must prepare an independent storage device. For Windows platform, you can use the MMCS (Windows 2003) or Windows Cluster (Windows 2008) that comes with the ENT version, and for Linux, there are corresponding suites in the commercial version. Third-party dual-machine software is also available.

The hot spare hard drive in the RAID array hard drive has no data, and its role is to automatically replace the damaged hard drive when the hard disk in the RAID is damaged. If you take the hot standby hard disk to another machine that does not make an array, it will look like an empty disk.

When setting up RAID 5, all available hard disks will be displayed, and you can designate a hard disk as a hot standby, and the hot spare hard disk will not be displayed in the system (only in the RAID management program that comes with the server).

RAID0 has no data redundancy, RAID1 is what you want.

If you don't have a RAID card, the motherboard doesn't support the RAID function, so you can't do it.

Need array card support, take the LSI card as an example, select the disk to be hot spare in WebBIOS, a new menu will appear, click Make Hotspare (Globe), OK, it's OK, globe is the meaning of the whole world, whether it appears, look at the card model.