Unmount
~~~~~~~

.Disconnect RPCs
[[umount-rpcs]
image::umount_rpcs.png["Disconnect RPCs", height=150]

//////////////////////////////////////////////////////////////////////
The umount_rpcs.png diagram resembles this text art:

Time
Step Client         MGS             MDT            OST
     -------        -------         --------       ------
1    OST_DISCONNECT-------------------------------->
2                 <--------------------------------OST_DISCONNECT
3    MDS_DISCONNECT----------------->
4                 <-----------------MDS_DISCONNECT
5    MGS_DISCONNECT->
6                 <-MGS_DISCONNECT
//////////////////////////////////////////////////////////////////////

*1 - Client issues an OST_DICONNECT to each OST.*

.OST_DISCONNECT Request Packet Structure
image::ost-disconnect-request.png["OST_DISCONNECT Request Packet Structure",height=50]

//////////////////////////////////////////////////////////////////////
The ost-disconnect-request.png diagram resembles this text art:

       OST_DISCONNECT:
      --request------
      | ptlrpc_body |
      ---------------
//////////////////////////////////////////////////////////////////////

See <<ost-disconnect-rpc>>.

*2 - Each OST replies to the OST_DISCONNECT.*

.OST_DISCONNECT Reply Packet Structure
image::ost-disconnect-reply.png["OST_DISCONNECT Reply Packet Structure",height=50]

//////////////////////////////////////////////////////////////////////
The ost-disconnect-reply.png diagram resembles this text art:

       OST_DISCONNECT:
      --reply--------
      | ptlrpc_body |
      ---------------
//////////////////////////////////////////////////////////////////////

*3 - Client issues an MDS_DICONNECT to each MDT.*

.MDS_DISCONNECT Request Packet Structure
image::mds-disconnect-request.png["MDS_DISCONNECT Request Packet Structure",height=50]

//////////////////////////////////////////////////////////////////////
The mds-disconnect-request.png diagram resembles this text art:

       MDS_DISCONNECT:
      --request------
      | ptlrpc_body |
      ---------------
//////////////////////////////////////////////////////////////////////

See <<mds-disconnect-rpc>>.

*4 - Each MDT replies to the MDS_DISCONNECT.*

.MDS_DISCONNECT Reply Packet Structure
image::mds-disconnect-reply.png["MDS_DISCONNECT Reply Packet Structure",height=50]

//////////////////////////////////////////////////////////////////////
The mds-disconnect-reply.png diagram resembles this text art:

       MDS_DISCONNECT:
      --reply--------
      | ptlrpc_body |
      ---------------
//////////////////////////////////////////////////////////////////////

*5 - Client issues an MGS_DICONNECT to the MGS.*

.MGS_DISCONNECT Request Packet Structure
image::mgs-disconnect-request.png["MGS_DISCONNECT Request Packet Structure",height=50]

//////////////////////////////////////////////////////////////////////
The mgs-disconnect-request.png diagram resembles this text art:

       MGS_DISCONNECT:
      --request------
      | ptlrpc_body |
      ---------------
//////////////////////////////////////////////////////////////////////

See <<mgs-disconnect-rpc>>.

*6 - The MGS replies to the MGS_DISCONNECT.*

.MGS_DISCONNECT Reply Packet Structure
image::mgs-disconnect-reply.png["MGS_DISCONNECT Reply Packet Structure",height=50]

//////////////////////////////////////////////////////////////////////
The mgs-disconnect-reply.png diagram resembles this text art:

       MGS_DISCONNECT:
      --reply--------
      | ptlrpc_body |
      ---------------
//////////////////////////////////////////////////////////////////////