Description

When the lifetime of the hard disk has reached the end, the number of bad sectors is too high, and the hard disk is in a bad health state, it is necessary to replace the hard disk. If a data synchronization task needs to read data from the hard disk to be replaced, unplugging the hard disk at this time may cause a double-point failure and affect production. This is where disk maintenance mode comes in handy. Before isolating the hard disk, a comprehensive inspection of the data will be performed to ensure that the production will not be affected when the hard disk is isolated.

Precautions

1. Support the maintenance mode of the data disk and cache disk.
2. There are two ways to enter maintenance mode.

Data migration:

• The popup box prompts the need to relocate ** GB of data(depending on the actual environment) to enter the maintenance mode. Check the box before proceeding to the next step. (If it is a cache disk, migrate all data in the disk group where the cache disk is located).

• It will prompt that you need to wait for the data to be migrated completely successfully before entering the maintenance mode.

• Prompted to migrate the affected virtual machine on the data disk.

Does not migrate data:

• Only ensure that the data involved in the disk can still be accessed after the disk is offline.

Prerequisites

The hard disk is in a bad health condition.

Steps