Error recovery of exsi mount ISCSI storage

Check the status of the volume:

# esxcli storage filesystem list

The storage status seen in esxi after an iscsi error is as follows:

Mount Point Volume Name UUID Mounted Type Size Free------------------------------------------------- ----------- ----------------------------------- ------- ------ -------------- --------------/vmfs/volumes/5d4bc70c-70355d08-734b-d09466821f5e iscsi-storage 5d4bc70c-70355d08-734b-d09466821f5e true VMFS-6 0

The recovery steps are as follows:

1. To view the unique identifier of the LUN on which you want to remove the datastore, run the following command:

# esxcfg-scsidevs -m

2. Unload the volume

# esxcli storage filesystem unmount [-u UUID | -l label | -p path ]

For example, unmount the LUN01 datastore using one of the following commands:

# esxcli storage filesystem unmount -l LUN01# esxcli storage filesystem unmount -u 4e414917-a8d75514-6bae-0019b9f1ecf4# esxcli storage filesystem unmount -p /vmfs/volumes/4e414917-a8d75514-6bae-0019b9f1ecf4

Note: If the VMFS filesystem you are attempting to unmount has active I/O or has not met the prerequisites for unmounting a VMFS datastore, the following error appears in the VMkernel log:

WARNING:VC:637: unmounting opened volume ('4e414917-a8d75514-6bae-0019b9f1ecf4' 'LUN01') is not allowed.VC:802: Unmount VMFS volume f530 28 2 4e414917a8d7551419006bae f4ecf19b 4 1 0 0 0 0 0 :Busy

To see what processes are in use for this volume, use the following command:

# vsish -e ls /storage/scsifw/devices/naa.6842b2b00066caec000084bb4f7e9e4e/worlds/ |sed 's:/::' |while read i;do ps |grep $i;done

End the process that is using the volume and use the command above to reinstall the volume

Rescan the ISCSI storage volume using the following command:

# esxcli storage core adapter rescan --all

Review all volume status:

# esxcli storage filesystem list

All volumes are healthy

Reference link: esxi unload storage, cannot unload storage