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Data Facility Storage Management Subsystem [a] (DFSMS) is a central component of IBM's flagship operating system z/OS. It includes access methods, utilities and program management functions. It includes access methods, utilities and program management functions.
WORM drives preceded the invention of the CD-R, DVD-R and BD-R.An example was the IBM 3363. [1] These drives typically used either a 5.1 in (13 cm) or a 12 in (30 cm) disc in a cartridge, with an ablative optical layer that could be written to only once, and were often used in places like libraries that needed to store large amounts of data.
A direct-access storage device (DASD) (pronounced / ˈ d æ z d iː /) is a secondary storage device in which "each physical record has a discrete location and a unique address". The term was coined by IBM to describe devices that allowed random access to data, the main examples being drum memory and hard disk drives . [ 1 ]
Virtual Storage Access Method (VSAM) [1] is an IBM direct-access storage device (DASD) file storage access method, first used in the OS/VS1, OS/VS2 Release 1 (SVS) and Release 2 (MVS) operating systems, later used throughout the Multiple Virtual Storage (MVS) architecture and now in z/OS.
1971 - StorageTek introduces the 3400 tape storage device. 1973 - StorageTek's disk division is founded. 1974 - StorageTek's first 3600 tape drive ships. 1975 - StorageTek ships the first 8000 Super Disk and announces the 8350 disk subsystem. 1978 - StorageTek develops the first solid-state disk. 1984 - StorageTek develops the first intelligent ...
Digital permanence addresses the history and development of digital storage techniques, specifically quantifying the expected lifetime of data stored on various digital media and the factors which influence the permanence of digital data. It is often a mix of ensuring the data itself can be retained on a particular form of media and that the ...