iscsiadm is a command-line tool that allows you to manage iSCSI connections and devices. The error message shown in the exhibit indicates that there is a problem with connecting to the iSCSI target at x.x.x.250.

https://stackoverflow.com/questions/29954195/error-message-from-iscsiadm-while-trying-to-connect-to-a-iscsi-drive

Nutanix volume groups are collections of vDisks that can be exposed to virtual machines or physical hosts using iSCSI protocol. Nutanix volume groups have a whitelist feature that allows you to specify which clients can access them.

https://portal.nutanix.com/page/documents/solutions/details?targetId=BP-2049-Nutanix-Volumes:BP-2049-Nutanix-Volumes

B. The administrator has a mistake when inputting the data services IP. This could cause the iscsiadm command to fail to discover or login to the iSCSI target at x.x.x.250. The administrator should verify that they have entered the correct data services IP for the Nutanix volume group.

D. The client’s IQN is no longer in the whitelist of the affected VG. This could cause the iSCSI target to reject or ignore the connection request from the client. The administrator should check that they have added or updated the client’s IQN in the whitelist of the Nutanix volume group.