Replacing a Disk Module

Impact on the System

During the replacement of a disk module, if system reconstruction is complete, host services are not affected; if system reconstruction is not complete, the quorum server software may fail, and the arbitration mode of the active-active service will switch to the static priority arbitration mode.

Prerequisites

• You have determined the position on the quorum server for removing a disk.
• You have obtained the cabinet number and chassis number of the quorum server.
• You have located the quorum server based on the preceding information, and labeled its panel to prevent misoperations.
• A spare part is on hand.

Tools and Materials

• ESD gloves or ESD wrist strap
• Packaging materials, for example, an ESD bag

Procedure

1. Remove the disk.
   • You do not need to power off the server when removing a disk module.
   • Determine the location of the disk module to be replaced before the operation.
   1. Push the spring that fastens the disk ejector lever. See step (1) in Figure 8-143.
      The ejector lever automatically ejects.

      Figure 8-143 Removing a disk
      

   2. Hold the ejector lever, and pull out the disk for about 3 cm (1.18 in.). See step (2) in Figure 8-143. Wait for at least 30 seconds until the disk stops working. Then remove the disk from the quorum server. See step (3) in Figure 8-143.
      • Wait for at least 30 seconds until the disk module stops working and remove it.
      • If a disk module is frequently removed and inserted in an interval shorter than 30 seconds, there are risks that the disk module cannot be identified.
   3. Place the removed disk in an ESD bag.

2. Install the disk.
   1. Take the spare part out of its ESD bag.
   2. Fully raise the ejector lever and push the spare part into the chassis along the guide rails until it does not move. See step (1) in Figure 8-144.
      Figure 8-144 Installing a disk
      

   3. Ensure that the ejector lever is fastened to the chassis beam, and lower the ejector lever to completely insert the spare part into the chassis. See step (2) in Figure 8-144.

3. Wait until the disk indicator turns normal, indicating that the disk is powered on.

Follow-up Procedure

Log in to the quorum server.

1. Run the qsadmin command to check whether the configuration page of the quorum server software is displayed.

   Q2qumrom:~ # qsadmin 
   start main! 
   Waiting for connecting to server... 
   admin:/>

   • If the preceding command output is displayed, go to 2.
   • If the preceding command output is not displayed, the arbitration configuration information has been lost. In this case, reinstall and configure the quorum server software.

     For details, see the HyperMetro Feature Guide for Block or HyperMetro Feature Guide for File specific to your product model.

2. Run the show server_ip command to check whether the connection between the quorum server and storage devices is in Established state.

   admin:/>show server_ip          
   Index     Server IP           Server Port         
   -----     ---------------     ---------------         
   1         192.168.6.31        30002         
   2         192.168.7.31        30002          
   Index     Local IP            Local Port          Remote IP           Remote Port         State         
   -----     ---------------     ---------------     ---------------     ---------------     ---------         
   0         192.168.6.31        30002               192.168.6.17        44510             Established         
   1         192.168.6.31        30002               192.168.6.18        36836             Established         
   2         192.168.7.31        30002               192.168.7.16        57416             Established         
   3         192.168.7.31        30002               192.168.7.28        49752             Established       

   • If yes, the quorum server can work properly.
   • If no, check whether the IP address of the quorum server is correct.