Beginning with its 1964 System/360 announcement, IBM's mainframes initially accessed count key data (CKD) subsystems via a channel connected to separate...
31 KB (3,202 words) - 20:13, 22 April 2025
Direct-access storage device (category IBM storage devices)
DASD remote synchronization product History of IBM magnetic disk drives History of IBM CKD Controllers The concept of physical record also applies to other...
11 KB (1,210 words) - 02:04, 16 January 2025
DASD was announced as part of the IBM 9340 channel-attached, count key data (CKD) DASD subsystem family which attached to IBM mainframes including the ES/9000...
75 KB (9,526 words) - 09:33, 25 March 2025
Cylinder-head-sector (category IBM storage devices)
half of a whole hard drive would be the first half of the drive. Cylinder Head Record format has been used by Count Key Data (CKD) hard disks on IBM mainframes...
25 KB (3,232 words) - 15:51, 21 March 2025
Hard disk drive (section History)
through use of operating system functions that invoke low-level drive commands. Older IBM and compatible drives, e.g. IBM 3390 using the CKD record format...
139 KB (14,137 words) - 09:57, 13 May 2025
communication controllers like IBM 37xx. By 1990 the 9370 line had around 6,300 installed systems and generated over 2 billion dollars in sales for IBM. The relatively...
11 KB (1,000 words) - 01:01, 11 September 2024
The IBM System/360 architecture is the model independent architecture for the entire S/360 line of mainframe computers, including but not limited to the...
79 KB (6,784 words) - 23:55, 19 March 2025
Disk sector (category All Wikipedia articles in need of updating)
verification] In the 1970s, IBM added fixed-block architecture Direct Access Storage Devices (FBA DASDs) to its line of CKD DASD. CKD DASD supported multiple...
16 KB (1,914 words) - 11:09, 1 September 2024
common in PCs where users used RLL controllers with MFM drives; "MFM drives should not be used on RLL controllers.". One utility providing an option to...
38 KB (4,791 words) - 06:59, 11 January 2025
American Motors Corporation (category Wikipedia articles in need of updating from February 2023)
Renault assembled CKD kits and marketed Rambler cars in France. In 1979, American Motors announced a record $83.9 million profit on sales of $3.1 billion (US$13...
204 KB (22,802 words) - 23:27, 12 May 2025