Cray System Management Documentation > Cray System Management (CSM) Administration Guide > power management > Power Off the External Lustre File System

Power Off the External Lustre File System

General procedure for powering off an external ClusterStor system.

Use this procedure as a general guide to power off an external ClusterStor system. Refer to the detailed procedures in the appropriate ClusterStor administration guide:

Title	Model
`ClusterStor E1000 Administration Guide 4.2 - S-2758`	ClusterStor E1000
`ClusterStor Administration Guide 3.4 - S-2756`	ClusterStor L300/L300N
`ClusterStor Administration Guide - S-2755`	Legacy ClusterStor

Procedure

SSH to the primary MGMT node as admin.

ncn# remote$ ssh -l admin cls01234n00.us.cray.com

Change to root user.
```
admin@n000$ sudo su –
```

Collect status information for the system before shutdown.

n000# cscli csinfo
n000# cscli show_nodes
n000# cscli fs_info
n000# crm_mon -1r

Check resources before unmounting the file system.

n000# ssh cls01234n002 crm_mon -r1 | grep fsys
n000# ssh cls01234n004 crm_mon -r1 | grep fsys
n000# ssh cls01234n006 crm_mon -r1 | grep fsys
n000# ssh cls01234n008 crm_mon -r1 | grep fsys
n000# ssh cls01234n010 crm_mon -r1 | grep fsys
n000# ssh cls01234n012 crm_mon -r1 | grep fsys
. . .

Stop the Lustre file system.

[n000]# cscli unmount -f FILESYSTEM_NAME

Verify that resources have been stopped by running the following on all even-numbered nodes:

[n000]# ssh NODENAME crm_mon -r1 | grep fsys

Example output:

cls01234n006_md0-fsys (ocf::heartbeat:XYMNTR): Stopped
cls01234n006_md1-fsys (ocf::heartbeat:XYMNTR): Stopped
cls01234n006_md2-fsys (ocf::heartbeat:XYMNTR): Stopped
cls01234n006_md3-fsys (ocf::heartbeat:XYMNTR): Stopped
cls01234n006_md4-fsys (ocf::heartbeat:XYMNTR): Stopped
cls01234n006_md5-fsys (ocf::heartbeat:XYMNTR): Stopped
cls01234n006_md6-fsys (ocf::heartbeat:XYMNTR): Stopped
cls01234n006_md7-fsys (ocf::heartbeat:XYMNTR): Stopped

SSH to the MGS node.
```
MGS# ssh MGS_NODE
```
To determine if Resource Group md65-group is stopped, use the crm_mon utility to monitor the status of the MGS and MDS nodes.
1. Shows MGS and MDS nodes in a partial stopped state.
```
[MGS]# crm_mon -1r | grep fsys
```
  Example output:
```
cls01234n003_md66-fsys (ocf::heartbeat:XYMNTR): Stopped
cls01234n003_md65-fsys (ocf::heartbeat:XYMNTR): Started
```
2. If the output above shows a partial stopped state (Stopped and Started), issue the stop_xyraid command and verify that the node is stopped.
```
[MGS]# stop_xyraid nodename_md65-group
[MGS]# crm\_mon -1r | grep fsys
```
  Example output:
```
cls01234n003_md66-fsys (ocf::heartbeat:XYMNTR): Stopped
cls01234n003_md65-fsys (ocf::heartbeat:XYMNTR): Stopped
```
Exit the MGS node.
```
MGS# exit
```
Power off the non-MGMT diskless nodes.
1. Check power state of all non-MGMT nodes and list the node hostnames (in this example cls01234n[02-15]) before power off.
```
n000# pm –q
```
  Example output:
```
on: cls01234n[000-001]
on: cls01234n[002-015]
unknown:
```
2. Power off all non-MGMT nodes.
```
[n00]$ cscli power_manage -n cls01234n[02-15] --power-off
```
3. Check the power status of the nodes.
```
n000# pm –q
```
  Example output:
```
on: cls01234n[000-001]
off: cls01234n[002-015]
unknown:
```
Repeat the previous step until all non-MGMT nodes are powered off.

From the primary MGMT node, power off the MGMT nodes.

n000# cscli power_manage -n cls01234n[000-001] --power-off

Shut down the primary management node.
```
n000# shutdown -h now
```

Next step

Return to System Power Off Procedures and continue with next step.