The system disk uses two hard disks to configure RAID1, how to replace it in case of fault

[nexus]

Question:
When the hard disk on the physical machine fails, the message log shows the HARD DRIVE FAILURE information in the message log. Check the hardware failure alarm message on the IPMI out-of-band management page, or you can see the hard disk glow red on the server panel. Hard RAID1 has the ability to automatically synchronize data, which can replace the failed disk with a new disk, and the data in RAID1 will be automatically synchronized to the new hard disk.

Resolution:

1. Prepare a new hard drive, but you need to pay attention to the following conditions

Ø The replacement hard disk should be a hard disk of the same model, series and capacity;

Ø The hard disk is a brand new hard disk or an unpartitioned and unformatted hard drive;

Ø The hard disk needs to be plugged back into the original RAID channel. (Slot of the original failed disk)

2. Confirm the location of the server where the faulty hard disk is located to prevent the hard disk from being unplugged while it is in normal use.

3. Most hard drives can be hot-swapped, but if the physical machine where the failed hard disk is located is running a more important VM, you can consider migrating the VM on the physical machine to another physical machine to prevent the VM from restarting abnormally during the hard disk replacement, which will affect the VM.

4. After the hot migration of the VMS is completed, SSH logs in to the server system to be changed, safely shuts down the server to be changed, and can replace the hard disk after the server stops running.

sync && sync && poweroff

5. Replace the failed hard drive on the server and insert a new hard drive.

6. When the server is turned on, you can see that the new hard disk status is rebuild, which means that the hard disk is in the synchronization data.

7. Guide the server restart to the operating system to ensure that the corresponding management/storage networks communicate normally. To check the status of the node NIC card, run the following command:

zs-show-network

9. Log in to the platform page, select Physical Machine in Hardware Facilities in the left navigation pane, select the physical machine in maintenance mode, and click Enable. After the physical machine is connected, consider moving the VM back to this physical machine.

10. You can also view the status of the hard disk and the progress of data synchronization on the out-of-band management page of the server.