Unmounting the SAN-QFS File System

The following procedures describe how to unmount a SAN-QFS file system that is using the SANergy software. Perform these procedures in the order in which they are presented.

How to Unmount the SAN-QFS File System on the SANergy Clients

Follow these steps for each client host on which you want to unmount the SAN-QFS file system.

1. Log in to the client host and become superuser.
2. Unfuse the file system from the software.

   # unfuse |mount-point

   For mount-point, specify the mount point on the SANergy client.

3. Unmount the file system from NFS.

   # umount host:/mount-point /local-mount-point

   For host, specify the MDC.

   For mount-point, specify the mount point of the Sun QFS file system on the MDC.

   For local-mount-point, specify the mount point on the SANergy client.

How to Unmount the SAN-QFS File System on the Metadata Controller

1. Log in to the MDC system and become superuser.
2. Disable NFS access to client hosts.

   MDC# unshare qfs-file-system-name /mount-point

   For qfs-file-system-name, specify the name of your Sun QFS file system, such as qfs1.

   For mount-point, specify the mount point of qfs-file-system-name.

   For more information about the unshare command, see the share(1M) man page.

How to Unmount the SAN-QFS File System on the Sun QFS Clients

Follow these steps on each participating client host.

1. Log in to a Sun QFS client host and become superuser.
2. Unmount the file system.

   For example:

   # umount /qfs1

How to Unmount the SAN-QFS File System on the Sun QFS Server

1. Log in to the host system upon which the Sun QFS file system resides and become superuser.
2. Unmount the file system.

Troubleshooting: Unmounting a SAN-QFS File System With SANergy File Holds

SANergy software issues holds on Sun QFS files to reserve them temporarily for accelerated access. If SANergy crashes when holds are in effect, you will not be able to unmount the file system. If you are unable to unmount a SAN-QFS file system, examine the /var/adm/messages file and look for console messages that describe outstanding SANergy holds.

Whenever possible, allow the SANergy file-sharing function to clean up its holds. In an emergency or in case of a SANergy file-sharing system failure, use the following procedure to avoid a reboot.

How to Unmount a File System in the Presence of SANergy File Holds

1. Use the unshare command to disable NFS access.
2. Use the samunhold command to release the SANergy file system holds.

   For more information about this command, see samunhold(1M) in Sun QFS and Sun Storage Archive Manager 5.3 Reference Manual.

3. Use the umount command to unmount the file system.