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
Wiktionary, the free dictionary. DASD may refer to: Direct-access storage device, a computer storage device DeForest Area School District Downingtown Area...
251 bytes (63 words) - 19:18, 8 August 2018
2012 Direct access (computing), a concept in computer science Direct Access Archive, a proprietary file format Direct access storage device, a secondary...
497 bytes (99 words) - 18:11, 8 April 2015
Proceedings. Retrieved 2 October 2013. Introduction to IBM Direct-access Storage Devices and Organization Methods. International Business Machines Corporation...
4 KB (540 words) - 11:42, 30 January 2025
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 (9,526 words) - 09:33, 25 March 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...
7 KB (855 words) - 18:26, 27 September 2023
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) - 12:20, 26 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) - 16:57, 19 April 2025
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...
14 KB (1,576 words) - 20:08, 17 May 2024
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
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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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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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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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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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
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 (6,534 words) - 20:57, 6 May 2025
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 (4,253 words) - 16:06, 20 December 2024
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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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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Cylinder-head-sector (category Computer storage devices)
platter 1 etc. is cylinder 12. Other forms of Direct Access Storage Device (DASD), such as drum memory devices or the IBM 2321 Data Cell, might give blocks...
25 KB (3,232 words) - 15:51, 21 March 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
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...
74 KB (6,798 words) - 02:57, 5 April 2025
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
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) - 11:48, 30 April 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...
42 KB (5,579 words) - 10:34, 11 August 2024
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
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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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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location on access, rather than storing the information in a mapping table. The virtualization software or device uses the metadata to re-direct I/O requests...
27 KB (3,947 words) - 20:53, 17 October 2024