Log in

Sangfor Support Center

Table of Contents
< All Topics
Print

[HCI] External storage having data block reused

Posted
Updated
Byjia.yi@sangfor.com
Views206

Issue Description

External storage appear warning "Data block in the datastore is being reused. Please contact technical support representative as soon as possible."

Error/Warning Information

file

Handling Process

  1. Login to HCI Web UI check which external datastore is affected.
  2. Shut down all the virtual machines or NFV running on the corresponding external datastore.
  3. In back end, use command sffsck -C /dev/mapper/{Datastore ID} to check whether having data block reused.
    Note: Just need to take note of ‘ReusedBlock’
    file
    As result shown in the screenshot, the ‘ReusedBlock’ parameter is showing value, which means that there are data block reused.
  4. Stop the automatic mount storage service with command :
    vs_cluster_cmd.sh e "/sf/etc/init.d/vtpstatd stop"
  5. Umount the storage for all the hosts :
    vs_cluster_cmd.sh e "umount /sf/data/{Datastore Name}"
    Note : Make sure there is no task running with the storage, else the umount action will fail. Check with "ps auxf | grep storageid" or "lsof | grep storageid".
  6. Check whether the storage has been unmount :
    vs_cluster_cmd.sh e "mount | grep {Datastore Name}"
    If there is no output indicating the umount executed successfully. Otherwise, you will need to check the mount status.
  7. Repair the external storage by using command : sffsck -a -f /dev/mapper/{DataStore Name} until the ReusedBlock value turn into 0.
    file
  8. After the storage is repaired, mount back the external storage by staring the automatic mount storage service which disabled earlier :
    vs_cluster_cmd.sh e "/sf/etc/init.d/vtpstatd start"
  9. After the storage is mount back, go to web UI to check whether the storage status is ‘Normal’.

Root Cause

  1. External datastore not supported for hardware accreleration will cause data block reused.
  2. Storage is unstable or problematic.
  3. Storage connection unstable.

Solution

Unmount the storage and repair the external storage until the ReusedBlock value turn into 0.

Suggestions

  1. Check whether external datastore supported for hardware accreleration.
  2. Check on the kernel logs whether there are storage connection errors.