### Human: Can you tell about Alert - A130156 - DiskRemovalStuck. ### Assistant: Investigating DiskRemovalStuck issues on a Nutanix cluster.. This Nutanix article provides the information required for troubleshooting the alert A130156 - DiskRemovalStuck for your Nutanix cluster.For an overview about alerts, including who is contacted and where parts are sent when a hardware alert case is raised, see KB 1959.

Alert Overview

The DiskRemovalStuck alert is generated by Curator when no progress in the remaining disk removal tasks is detected after several scans.This is an event triggered alert that is sent once the issue is detected and is not scheduled to run on an interval.

Sample Alert

For status: Critical

alert_type: DiskRemovalStuck

Output messaging

Check ID130156DescriptionDrive Removal StuckCauses of failureDrive Removal Stuck.ResolutionsContact Nutanix support.ImpactDrive cannot be removed from the cluster.Alert IDA130156Alert TitleDrive Removal StuckAlert Smart TitleDrive disk_id Removal Stuck.Alert MessageRemoval of drive disk_id is stuck.. Troubleshooting

The DiskRemovalStuck alert is generated by Curator when no progress is detected upon several scans.Disk removal is a multi-stage process which, depending on whether a disk in question is the metadata drive or not and which features are in use, will need to migrate Oplog, NearSync store, Cassandra metadata, Extent Store data, etc, in specific order. For bigger disks, the system needs to evacuate and redistribute terabytes of data in the background, without affecting VMs operation and without compromising resiliency. This naturally takes time.

As per HW replacement documentation: "Estimated time to complete: Variable, can take up to several hours".

Resolving the Issue

There are multiple possible causes for drive or node removal getting stuck. Consider engaging Nutanix Support at https://portal.nutanix.com/ to investigate and resolve this issue.

Collecting Additional Information

Before collecting additional information, upgrade NCC. For information on upgrading NCC, see KB 2871.Collect the NCC output file ncc-output-latest.log. For information on collecting the output file, see KB 2871.Collect Logbay bundle using the following command. For more information on Logbay, see KB 6691. 
	nutanix@cvm$ logbay collect --aggregate=true
	

Attaching Files to the Case

Attach the files at the bottom of the support case on the support portal.If the size of the NCC log bundle being uploaded is greater than 5 GB, Nutanix recommends using the Nutanix FTP server due to supported size limitations. See KB 1294.

Requesting Assistance

If you need further assistance from Nutanix Support, add a comment to the case on the support portal asking Nutanix Support to contact you. If you need urgent assistance, contact the Support Team by calling one of our Global Support Phone Numbers. You can also click the Escalate button in the case and explain the urgency in the comment, and Nutanix Support will be in contact.

Closing the Case

If this KB resolves your issue and you want to close the case, click on the Thumbs Up icon next to the KB Number in the initial case email. This informs Nutanix Support to proceed with closing the case. You can also update the support case saying it is okay to close the case and Nutanix Support will close the case.. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.