The Parameter Library (PARMLIB) › VUSSMNTS Parmlib Member › Mount Point Directory Sections

Mount Point Directory Sections

A UNIX file system is typically represented in z/OS by Network Attached Storage (NAS), an HFS, or ZFS data set. Read or write access to a UNIX file system requires that it be mounted under a directory path. Section names in the VUSSMNTS member describe the directory name under which to dynamically mount a UNIX file system for use by CA Vtape.

Note: For more information about how the UNIX directory structure is designed for use by USS Backstore, see the section USS File Systems.

Section names within the VUSSMNTS member must follow a strict naming convention otherwise they are ignored. The following are the section names in this member:

<USSMountPoints>

This <section> is required although no attributes are currently defined or read for this section. The <USSMountPoints> section is reserved and intended for future use.

In the sample VUSSMNTS member provided we use the <USSMountPoints> section to simply document and describe contents of the VUSSMNTS member itself

<Triplex>

This is a required <section>. The file system defined by the <Triplex> section is mounted under the /RootDirectory/Signature/triplex directory path. This is the UNIX directory used to read or write Triplex Backstore copies of Virtual Volumes. The <Triplex> directory must mount the same file system shared by SVTS subsystems of a CA Vtape Complex.

<Triplex/Groupnn>

Where nn represents a valid Group number.

These <sections> are optional and do not have to be defined. The file systems defined by a <Triplex/Groupnn> section are mounted under the /RootDirectory/Signature/triplex/groupnn directory path. This allows CA Vtape to isolate a specific group of Triplex Backstore Virtual Volumes onto separate hardware. This might be desirable for performance reasons or if there was an unusually large amount of Virtual Volume data tied to a specific Group.

Note: <Triplex> or <Triplex/Groupnn> attributes within the VUSSMNTS member all observe the following:

• Some of the attributes in this list are optional. If commented out or not coded, the documented default will be used.
• Attributes in this list are loaded when CA Vtape is started. It is possible to change the file system mount points without restarting the SVTS subsystems but we recommend taking special precautions when doing so.

  Note: For a detailed description how to accomplish this task, see the section File System Reconfiguration.

DSName=

This attribute is required and defines the name of the data set containing the file system to be mounted.

For zFS and HFS file systems this attribute specifies the actual name of the z/OS data set.

Network attached storage (NAS) can also be mounted as file systems under the z/OS UNIX using Network File System (NFS). These are typically hardware DASD devices and therefore do not have or use z/OS naming conventions, however z/OS still requires a unique way to identify these NFS devices. For NFS, DSName can be any name chosen by you to uniquely identify the file system being mounted.

Valid Values: A valid 1 to 44 character data set name

Section: <Triplex> or <Triplex/Groupnn>

Feature: UnixSystemServices

FSType=

This attribute is required and describes the type of file system to being mounted.

Valid Values: HFS, NFS, ZFS

Default Value: NFS

Section: <Triplex> or <Triplex/Groupnn>

Feature: UnixSystemServices

Parms=

This is an optional attribute intended primarily for use when FSTYPE=NFS is specified. It describes NFS server, IP and path information necessary to identify and mount the network attached device.

Note: For more information, see the guide z/OS Network Files Systems Guide and Reference.

Valid Values: 0 to 256 character string

Default Value: NULL$

Section: <Triplex> or <Triplex/Groupnn>

Feature: UnixSystemServices