Since its inception, CA Disk has given storage administrators versatile and flexible tools to manage the storage of their company's data. The fundamental tasks of data storage management include backup and recovery, archive, space release, and the movement of data at the volume and data set level. CA Disk has also provided extensive reporting capability, both on-line and batch, for determining the status of a data center's storage environment. These tools have kept pace over the years with new developments in hardware devices and with software systems, such as database management products.
In performing these storage management tasks, storage administrators have managed the storage of data after the fact. That is, decisions regarding the backup, archive, or movement of data were made after the data sets had been allocated, and were based on such criteria as the data set name, organization type, the age of the data set, its last reference date, the device type on which it is stored, and so on.
With the introduction of IBM's DFSMS, capabilities were made available for a storage administrator to set forth and administer a storage plan for each data set prior to data set allocation. This has moved the task of managing data storage into the realm of system-managed storage, a long-term objective of most data centers.
IBM's storage management subsystem (DFSMS) is designed to work in conjunction with software systems that perform the storage management tasks. The subsystem itself allows storage administrators to predefine a storage plan for data sets, based on such criteria as:
In addition, storage administrators can define the physical storage conditions for volumes or groups of volumes in a system. These conditions include:
Users who are implementing part of their storage management plan through the facilities of SMS have found that converting their data center to system managed storage is a time-consuming task that requires careful planning and a commitment by management to the concept. Additionally, many types of data sets cannot be managed through the facilities of SMS and need traditional management tools for cost-effective results.
CA Disk has been developed to provide system managed storage for all data within an enterprise, whether under the control of SMS or not. Using a combination of the traditional rules for managing data, along with the SMS constructs where appropriate, storage administrators can use CA Disk to design sophisticated storage management schemes that will meet the needs of multiple end users, expedite routine application production processing, and slow the ever-increasing demand for additional costly hardware storage devices.
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