A direct-access storage device (DASD) (pronounced /ˈdæzdiː/) is a secondary storage device in which "each physical record has a discrete location and a...
11 KB (1,210 words) - 02:04, 16 January 2025
Virtual Storage Access Method (VSAM) is an IBM direct-access storage device (DASD) file storage access method, first used in the OS/VS1, OS/VS2 Release...
13 KB (1,535 words) - 22:31, 11 March 2025
2012 Direct access (computing), a concept in computer science Direct Access Archive, a proprietary file format Direct access storage device, a secondary...
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History of IBM magnetic disk drives (redirect from History of IBM storage devices)
terms to describe its various magnetic disk drives, such as direct-access storage device (DASD), disk file and diskette file. Here, the current industry...
75 KB (9,527 words) - 09:33, 2 June 2025
Wiktionary, the free dictionary. DASD may refer to: Direct-access storage device, a computer storage device DeForest Area School District Downingtown Area...
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to access data storage devices, such as disk arrays and tape libraries from servers so that the devices appear to the operating system as direct-attached...
21 KB (2,640 words) - 17:51, 14 April 2025
Count key data (category IBM storage devices)
Count key data (CKD) is a direct-access storage device (DASD) data recording format introduced in 1964, by IBM with its IBM System/360 and still being...
34 KB (3,928 words) - 16:27, 28 May 2025
of routines used in retrieving data from, and storing data onto, direct access devices.": p.5 BDAM is available on OS/360, OS/VS2, MVS, z/OS, and related...
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Direct memory access (DMA) is a feature of computer systems that allows certain hardware subsystems to access main system memory independently of the...
28 KB (3,934 words) - 17:12, 29 May 2025
Proceedings. Retrieved 2 October 2013. Introduction to IBM Direct-access Storage Devices and Organization Methods. International Business Machines Corporation...
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data set is typically stored on a direct access storage device (DASD) or magnetic tape, however unit record devices, such as punch card readers, card...
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Direct-attached storage (DAS) is digital storage directly attached to the computer accessing it, as opposed to storage accessed over a computer network...
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IBM 2321 Data Cell (category IBM storage devices)
The IBM 2321 Data Cell is a discontinued direct access storage device (DASD) for the IBM System/360, announced along with System/360 in April 1964. It...
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IPL concept is device-independent. It is capable of IPL-ing from a card deck, from a magnetic tape, or from a direct access storage device, (DASD), e.g...
29 KB (4,255 words) - 12:52, 25 May 2025
operating in New Zealand Relative track and record, an access method in a direct-access storage device Ticket to Ride (disambiguation) This disambiguation...
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OS/360 and successors (section Storage layout)
least one direct access storage device. Although OS/360 itself was discontinued, successor operating systems, including the virtual storage MVS and the...
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and face no penalty. Direct-access storage device Queued sequential access method Sequential data Random and Sequential Data Access, Microsoft TechNet Irfan...
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Glossary of computer hardware terms (redirect from Device programmer)
display device, such as a computer monitor. Direct Access Storage Device (DASD) A mainframe terminology introduced by IBM denoting secondary storage with...
39 KB (4,596 words) - 21:01, 1 February 2025
Peer to Peer Remote Copy (category Storage software)
failure of the primary site. In IBM zSeries computers with two direct access storage device (DASD) control units connected through dedicated connections...
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History of IBM CKD Controllers (category IBM storage devices)
accessed count key data (CKD) subsystems via a channel connected to separate Storage Control Units (SCUs) with attached Direct Access Storage Devices...
31 KB (3,202 words) - 20:13, 22 April 2025
technology containing just one drive device are referred to as autoloaders or autochangers. Robotic-access storage devices may have a number of slots, each...
57 KB (6,538 words) - 07:31, 22 May 2025
access storage devices (DASD), such as disk drives. In the latter case, a data set written with sequential access can be later processed in a direct manner...
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internal storage cartridge. The IBM Data Cell [noodle picker] was among several IBM trademarked "speedy" mass online direct-access storage peripherals...
83 KB (8,931 words) - 04:31, 25 May 2025
Network-attached storage (NAS) is a file-level computer data storage server connected to a computer network providing data access to a heterogeneous group...
20 KB (2,509 words) - 18:25, 16 May 2025
Volume Table of Contents (category IBM storage software)
determine the volumes on which it resides. When a program opens a Direct Access Storage Device (DASD) dataset, the OPEN routine searches the VTOC index (VTOCIX)...
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Network Direct Attached Storage (NDAS) is a proprietary storage area network system, originally marketed by the company Ximeta, for connecting external...
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Booting (redirect from Boot device)
utility into main storage, and for this specific purpose "IPL Text" is placed on the disk by the stand-alone DASDI (Direct Access Storage Device Initialization)...
100 KB (11,298 words) - 00:45, 25 May 2025
is sometimes confused with a direct access storage device access method, but it is not for direct access storage devices exclusively; rather, it is a...
16 KB (1,627 words) - 10:12, 13 May 2025
Solid-state drive (redirect from Solid-state storage device)
solid-state storage device that uses integrated circuits to store data persistently. It is sometimes called semiconductor storage device, solid-state device, or...
127 KB (11,103 words) - 13:53, 9 May 2025
Support programs for OS/360 and successors (redirect from Access Method Services)
tracks. IEHDASDR: 161–187 can performs several operations for direct access storage devices (DASD) Initialize a DASD volume, with optional surface checking...
47 KB (5,993 words) - 21:20, 30 May 2025