VTOC provides an intuitive interface for completing forms requested by your provider. Your data is securely shared with your care team. VTOC provides the ability to enter your health information and build your Personal Health Record using data standards of the ARRA HITECH Act.

The VTOC lists the data sets that reside on its volume, along with information about the location and size of each data set, and other data set attributes. A standard z/OS utility program, ICKDSF, is used to create the label and VTOC. When a disk volume is initialized with ICKDSF, the owner can specify the location and size of the VTOC.

In the storage architecture of OS/360 and successors, CMS, and DOS/360 and successors, the Volume Table of Contents (VTOC) is a data structure that provides a way of locating the data sets that reside on a particular DASD volume.

To display or print a list of data sets on one or more disks, you can use the Work with VTOC utility. With this utility, you can list either all the data sets, or a subset of the data sets based on a generic data set name.

The VTOC index is a physical-sequential data set on the same volume as the related VTOC. It consists of an index of data set names in DSCBs contained in the VTOC and volume free space information. The data set names are in format-1 and format-8 DSCBs.

The purpose of the VTOC is to tell z/VSE and z/OS, both of which use the VTOC to manage space on the volume, that there is no room on the volume. They can look, but not touch. z/VM itself doesn't use the VTOC. The VTOC is pointed to by the label. Now let's look at a real example. This 10-cylinder disk was formatted using CPFMTXA.

Purpose: The VTOC is a data set that describes the contents of the direct access volume on which it resides. It is a contiguous data set; that is, it resides in a single extent on the volume and starts after cylinder 0, track 0 and before track 65,535.

VTOC 由 DSCB (Data Set Control Block)組成，它對應於一個數據集，或者駐留於該卷上的 VSAM 數據集的定位信息，或者未分配的磁軌。 對應於數據集的 DSCB 和反映 VSAM 數據集在該卷上的空間占用情況。

VTOC记录了存储设备上所有数据集的属性，如数据集名，定位信息，长度，记录格式，使用情况，建立日期等信息. VTOC 由 DSCB (Data Set Control Block)组成，它对应于一个数据集，或 …

This article describes how to use the VTOC Utility to display volume information and view VTOC entries in a volume. You can also access various functions for any listed data set.