Disk Issues: Disk Volume Not Mounted

Overview

This article describes the process to ensure that the volumes are mounted correctly and to fix them when they are listed as not mounted. This issue is common for old systems and happens when the software loses sync with an HDD, which is still physically connected.

Process 

Please perform the steps below in the provided order. 

Step 1 - Checking That the Volumes Are Mounted (CLI)

1. Using SSH, connect to the management IP of the server and enter the padmin credentials.

2. Enter the su admin command to access the CLI console. If you cannot access the console, try to use the root credentials by entering su -.

   root@<MANAGEMENT_IP> /home/padmin # su admin
   Cli version - 6.2.2b601
   Snmp version - PeerApp UltraBand software version 6.2.2b601

3. Run the command show systemid to get the management service tag.

   console> show systemid
   *99WHZG2

4. Run the enable command and enter the first service tag (without the asterisk) displayed in step 3 as the password.

   console> enable 
   Password:99WHZG2

5. Type show status and press Enter to get a confirmation if the Device state is started:

   console# show status 
   Operational state   Device state    Administrative state
   enabled             started         unlocked

6. Type show volumes and press Enter to get information on the state of each volume:

   console# show volumes 
   Configured volumes : 0 
   Volume name       State          Owner
   /mnt/vol1         mounted        ce-1
   /mnt/vol2         mounted        ce-1
   /mnt/vol3         mounted        ce-1
   /mnt/vol4         mounted        ce-1
   /mnt/vol5         mounted        ce-1
   /mnt/vol6         mounted        ce-1
   /mnt/vol7         not mounted
   /mnt/vol8         mounted        ce-1
   /mnt/vol9         mounted        ce-1
   /mnt/vol10        mounted        ce-1
   /mnt/vol11        mounted        ce-1
   /mnt/vol12        mounted        ce-1
   /mnt/vol13        not mounted
   /mnt/vol14        mounted        ce-1
   /mnt/vol15        mounted        ce-1     

   From the sample output, you can confirm that the volumes 7 and 13 are not properly mounted.

Step 2 - Checking Volume Usage and Status Using the GUI

You can also confirm the volume status by accessing the Graphical User Interface (GUI) via the following link (you will need the management IP address):

https://<MANAGEMENT_IP>/ui/statistics/storage/volume_usage

Step 3 - Checking Disks Availability for PeerApp Cache to Use

Run the /opt/pang/bin/fdisk.sh script that shows if the disks are available to be used by PeerApp Cache:

root@<MANAGEMENT_IP> /home/padmin # /opt/pang/bin/fdisk.sh 
PeerApp,0001,U      /dev/sdh1 
PeerApp,0002,U      /dev/sdg1 
PeerApp,0003,U      /dev/sdf1 
PeerApp,0004,U      /dev/sde1 
PeerApp,0005,U      /dev/sdd1 
PeerApp,0006,U      /dev/sdc1 
PeerApp,0007,U      /dev/sdi1 
PeerApp,0008,U      /dev/sdo1 
PeerApp,0009,U      /dev/sdn1 
PeerApp,0010,U      /dev/sdm1 
PeerApp,0011,U      /dev/sdl1 
PeerApp,0012,U      /dev/sdk1 
PeerApp,0013,U      /dev/sdj1 
PeerApp,0014,U      /dev/sdp1 
PeerApp,0015,U      /dev/sdq1 
PeerSSD,0241,U      /dev/sdr1

The sample above shows that all volumes are mounted (even volumes 7 and 13).

If the fdisk script does not show the affected volumes, do not follow the rest of the process. There could be a physical disk failure or any other issue that needs to be escalated. To verify if there is a disk failure, please refer to the PeerApp System Status Degraded Due to a Physical Disk Error article.

Step 4 - Correcting Affected Volumes

Execute the CLI commands in the following order for each of the affected volumes.

1. Type cache volume deactivate and press Enter. Type the required volume number when prompted. 

   console# cache volume deactivate
   Configured volumes : 0
   Please enter volume number <1-240>
   7
   Deactivating volume 7 
   console# cache volume deactivate
   Configured volumes : 0
   Please enter volume number <1-240>
   13
   Deactivating volume 13 
   

   Wait for one minute before performing the next step.

2. Type cache volume activate and press Enter. Type the required volume number when prompted. 

   console# cache volume activate
   Configured volumes : 0
   Please enter volume number <1-240>
   7
   Activating volume 7 
   console# cache volume activate
   Configured volumes : 0
   Please enter volume number <1-240>
   13
   Activating volume 13

Step 5 - Checking That the Volumes Are Now Properly Mounted (CLI)

Type show volumes and press Enter to recheck the status of the volumes:

console# show volumes 
Configured volumes : 0 
Volume name        State         Owner
/mnt/vol1          mounted       ce-1
/mnt/vol2          mounted       ce-1
/mnt/vol3          mounted       ce-1
/mnt/vol4          mounted       ce-1
/mnt/vol5          mounted       ce-1
/mnt/vol6          mounted       ce-1
/mnt/vol7          mounted       ce-1
/mnt/vol8          mounted       ce-1
/mnt/vol9          mounted       ce-1
/mnt/vol10         mounted       ce-1
/mnt/vol11         mounted       ce-1
/mnt/vol12         mounted       ce-1
/mnt/vol13         mounted       ce-1
/mnt/vol14         mounted       ce-1
/mnt/vol15         mounted       ce-1

Step 6 - Checking the Volume New Status Using the GUI

You should see the same result if you check through the GUI. Please take into account the Statistics menu in the graphical interface is not updated in real-time, so there can be a delay since the volumes are activated using the CLI until they show active in the GUI.

https://<MANAGEMENT_IP>/ui/statistics/storage/volume_usage

Additional Step

To avoid this issue, you can use a dual-link configuration for the iSCSI connection when one of the iSCSI links is not connected.

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