Shulou(Shulou.com)06/02 Report--

Continue disk management under Windows (1) and disk management under Windows (2).

8. Mirror roll

Users can combine a simple volume in one dynamic disk with unallocated space in another dynamic disk into a mirror volume, or two unallocated possible spaces into a mirror volume. The system is given a logical drive letter, and the two areas store exactly the same data.

1. It is composed of 2 disks and must be located in a dynamic disk.

2. Using RAID-1 technology

3. The capacity of the two volumes that make up the volume must be the same

4. Can include system volume and active volume

5. Members cannot include the EFI system partition of GPT disk

6. The system stores the data in two disks at the same time. Therefore, when one disk fails, the system can still use the data from another disk, so it has fault tolerance.

7. When reading the data of the volume, the system can read the data from two disks at the same time, so the mirrored volume can improve the efficiency of reading data.

8. Since only 50% of the disk space of the mirrored volume is effectively used (the data in the two disks is the same), the unit storage cost of each MB is higher.

9. Can no longer be extended

10. Only server-level Windows operating systems support it.

11. The whole mirror volume is considered as one. If you want one of the members to use it alone, you need to break the mirror, delete the mirror, and delete the mirror volume.

1. Create a mirror volume

The following figure connects three disks with sizes of 10G, 12G and 14G, all of which have been online, initialized dynamic disks and so on.

Select the disk and enter the size. Only two disks can be selected, no more disks can be selected, and the size must be the same.

The result after completion is as follows:

2. Interrupt the mirrored volume

After the operation, the original two members will become separate simple volumes, and the data in them will be retained, while the other volume will be assigned a drive letter.

3. Delete the image

The data on the deleted member is deleted, and the space it occupies becomes unallocated space.

4. Delete mirrored volumes

The data of both members is deleted and both members become unallocated space.

5. Repair of mirrored volumes

The mirrored disk 2 is removed from the settings of the virtual machine, and the mirrored volume fails. The following is the procedure for repairing mirrored volumes

(in order to repair, you can add a new hard disk during the test, which must be larger than the size of the mirrored volume. Since there is still a 14g hard disk in front of you, there is no need to add a new virtual hard disk here.)

Failure phenomenon:

If there is a failure of the hard drive, there will be "repetition of failure", "loss" and other prompts.

The essence of the process of repair is to rebuild the mirror, and the original mirror must be deleted before rebuilding the mirror.

Right-click the missing volume and select Delete Mirror

Select the missing disk to complete the remove Mirror operation. At this time, the "lost" disappeared. This allows you to recreate the mirror for other volumes that still exist.

Add mirror: because the disk in the original volume has data, it takes a certain amount of time to complete the data replication synchronization operation when rebuilding the mirror.

6. Reactivate the disk

When one of the disks in the volume cannot be connected temporarily (offline, lost, or online), after reconnecting, you need to click "reactivate disk" to complete the connection operation and restore it to normal.

Take one of the disks offline

The following results appear:

If the disk is reconnected, select "online"

Select reactivate Volume

Since there may be some data changes during the offline period, resynchronization is required

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