# Monitoring Virtual Tape Subsystems (VTS)

This topic describes the workspaces that monitor the status of virtual tape subsystems. You access these workspaces through the Virtual Tape Subsystems node in the Tivoli® Enterprise Portal.

See Workspaces for general information on predefined workspaces and a list of all nodes that are included in the Tivoli OMEGAMON XE for Storage on z/OS product. Each node corresponds to a specific area of storage resource monitoring. And each node includes links to a unique set of storage resource workspaces. See Accessing workspaces to learn about navigating among workspaces. And see Integration with other products to learn about linking to the workspaces of other IBM Tivoli Monitoring products.

## Navigating the workspaces of the Virtual Tape Subsystems node

This section summarizes the workspace links that are available through the Navigator node. Depending on your monitoring goal, you follow a specific series of links to get detailed information about storage resources.

You start in the Virtual Tape Subsystems node to navigate to the workspaces that you see in Table 1. You can access the workspaces in this table using the standard path and method for navigating workspaces.

Table 1. Virtual Tape Subsystems node: bulleted list showing the hierarchy of linked workspaces
Virtual Tape Subsystems VTS Physical Devices VTS Virtual Devices VTS Capacity VTS Tape Volume Cache TS7700 Series Cluster TS7700 Series Cache TS7700 Series Cache Partition TS7700 Series Cache Preference Group VTS Virtual Drive Summary VTS Composite Details

## Virtual Tape Subsystems workspace

This workspace is the principal workspace for this node, and it enables you to monitor both types of virtual tape subsystems, 3494 and 7700.

In a table view, when you right-click the row for a 3494 subsystem, you see standard (non-7700) options. When you select a 7700 subsystem, you see only the link to the TS7700 Series Cluster Workspace.

When you click the Virtual Tape Subsystems node in the Navigator of the Tivoli Enterprise Portal, you see the Virtual Tape Subsystems workspace. The main components of the workspace are as follows:

Views
  This workspace provides the following views. For a description of the attributes used as column headings in the workspace table view, review the attribute group definitions for this workspace in the online help. The help resource includes attribute descriptions that are displayed when you hover with the mouse pointer over a column heading.
  Virtual tape subsystems table view
    The table view contains one row of data for virtual tape subsystem. The view contains the following information:
    - The VTS name and library type
    - The number of physical drives available
    - The number of virtual devices online
    - The average and maximum virtual mount pending times
    - The virtual disconnect time
    - The volume data (in gigabytes) read and written through the host channels to virtual volumes associated with this VTS
    - The recall percent
    - Number of scratch volumes, library type, model and serial number for this VTS
  Volume recall % > 20 bar graph
    This graph contains one bar for each VTS for which the percentage of virtual mounts to actual physical mounts exceeds 20%. The bar height indicates the recall percentage.
  Average virtual mount pending time > 300 bar graph
    This graph contains one bar for each VTS for which the average time spent waiting for a virtual mount exceeded 300 seconds. The height of the bar indicates the actual time spent waiting.
Workspaces that are linked to this workspace
  See Navigating the workspaces of the Virtual Tape Subsystems node.

  Learn how to navigate among workspaces here: Accessing workspaces. Also see Integration with other products.

  See Workspaces for a list of all nodes provided in Tivoli OMEGAMON XE for Storage on z/OS.

## Summary information for the workspaces in this node

This section lists the views and related attribute groups for the workspaces of the Virtual Tape Subsystems node.

See Workspaces for general information on predefined workspaces and a list of all nodes that are included in the Tivoli OMEGAMON XE for Storage on z/OS product. Each node corresponds to a specific area of storage resource monitoring. And each node includes links to a unique set of storage resource workspaces. See Accessing workspaces to learn about navigating among workspaces. And see Integration with other products to learn about linking to the workspaces of other IBM Tivoli Monitoring products.

See Virtual Tape Subsystems workspace for more additional information on the primary workspace for this node.

Virtual Tape Subsystems workspace
View | View type | Attribute group
Virtual Tape Subsystems Report | TABLE | VTS Overview
Volume Recall % > 20 | BAR | VTS Overview
Average Virtual Mount Pend Time > 300 | BAR | VTS Overview

VTS Physical Devices workspace
View | View type | Attribute group
Mount Pend Time | BAR | VTS Physical Devices
Concurrent Mounts | BAR | VTS Physical Devices
Physical Drives Status | BAR | VTS Physical Devices
Physical Mount Reason | BAR | VTS Physical Devices

VTS Virtual Devices workspace
View | View type | Attribute group
Concurrent Mounts | BAR | VTS Virtual Devices
Mount Pend Time | BAR | VTS Virtual Devices
Mount Use Time | BAR | VTS Virtual Devices
Virtual Device Activity Report | TABLE | VTS Virtual Devices
Recall Mount Time | BAR | VTS Virtual Devices

VTS Capacity workspace
View | View type | Attribute group
VTS Capacity Report | TABLE | VTS Capacity
Host Channel Activity | BAR | VTS Capacity
VTS Channel Activity | BAR | VTS Capacity
Physical Tape Usage | BAR | VTS Capacity

VTS Tape Volume Cache workspace
View | View type | Attribute group
VTS Tape Volume Cache Report | TABLE | VTS Cache
Throttling Delay | BAR | VTS Cache
TVC Volume Age | BAR | VTS Cache
Virtual Mounts | BAR | VTS Cache
Throttling Percent | PIE | VTS Cache

VTS Composite Details workspace
View | View type | Attribute group
VTS Controller Report | TABLE | VTS Composite Library
Mounts by Unit | BAR | VTS Virtual Devices
Logical Volumes to be Copied | BAR | VTS Virtual Devices
Data to Copy | BAR | VTS Virtual Devices

VTS Virtual Drive Summary workspace
View | View type | Attribute group
Virtual Tape Subsystems Virtual Tape Drives | TABLE | VTS Virtual Devices Summary
Tape Drive Response Time | BAR | VTS Virtual Devices Summary

### Workspaces related to TS7700-series VTS

The following attribute groups supply data to the workspaces that are related to TS7700-series VTS:

- VTS TS7700-series Cache Container
- VTS TS7700-series Cache Partition Container
- VTS TS7700-series Cache Preference Group
- VTS TS7700-series Cluster

TS7700 Series Cluster workspace
View | View type | Attribute group | Description
Cluster Summary | TABLE | VTS CLUSTER | Contains basic information about a cluster in a TS7700 tape virtualization system, such as ID and machine type and model. The view also contains metrics that are derived from standard sources, such as the virtualization (vNode) or hierarchical data storage management (hNode).
Volume Recall Percent | BAR | VTS CLUSTER | Charts the following metric for each cluster in the grid: Volume Recall Percent
Average Virtual Mount Pend Time | BAR | VTS CLUSTER | Charts the following metric for each cluster in the grid: Average Virtual Mount Pend Time.

TS7700 Series Cache workspace
View | View type | Attribute group | Description
Cache Throttling Percentages | BAR | VTS TPVOLC | Charts the following two metrics: Percent Write Overrun Throttle and Percent Copy Throttle.
Cache Throttling Averages | BAR | VTS TPVOLC | Charts the following three metrics: Average Write Overrun Throttle, Average Copy Throttle, and Average Overall Throttle.
Tape Volume Cache Summary | TABLE | VTS TPVOLC | Contains basic information about a cache in a TS7700 tape virtualization system, based on metrics that are derived from the "HSM - Cache Container" record of the "Hnode HSM Historical Record."

TS7700 Series Cache Partition workspace
View | View type | Attribute group | Description
Average Cache Miss Mount Times | BAR | VTS CACHEPC | Charts the following metric for each of the 8 partitions: Average Cache Miss Mount Time.
Cache Miss Mounts | BAR | VTS CACHEPC | Charts the following metric for each of the 8 partitions: Cache Miss Mounts.
Cache Partition Summary | TABLE | VTS CACHEPC | Contains basic information about a cache partition in a TS7700 tape virtualization system. All attributes in this table are derived from the "HSM - Cache - Partition Container" record of the "Hnode HSM Historical Record."

TS7700 Series Cache Preference Group workspace
View | View type | Attribute group | Description
Average Cache Age | BAR | VTS CHPGRP | Charts the following three metrics: 4 Hour Average Cache Age, 48 Hour Average Cache Age, and 35 Day Average Cache Age.
Number of Volumes Migrated | BAR | VTS CHPGRP | Charts the following three metrics: Volumes Migrated Last 4 Hours, Volumes Migrated Last 48 Hours, and Volumes Migrated Last 35 Days.
Cache Preference Group Summary | TABLE | VTS CHPGRP | Contains basic information about a cache preference group in a TS7700 tape virtualization system, based on metrics that are derived from the HSM HSM - Cache - Partition - Preference Group Container record of the "Hnode HSM Historical Record."