DASD: IBM's direct access storage devices
How to manage data storage used with IBM and IBM-compatible systems under MVS, VM, and other operating systems. The only book to show how to implement and control all DASD, including the 3390 generation on bus-and-tag and ESCON channels.
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Background and History
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access method ACS routines actuator allocation alternate track application architecture archived bits capacity catalog central storage channel command channel path channel program configuration contains control block count-key-data cylinder DASD Fast Write DASD subsystem DASD volume data center data mover data set data set name DFHSM DFSMS disk DSCB dual copy end user error ESCON example EXCP Figure format gigabytes hardware head of string I/O devices I/O operation I/O requests ICKDSF IDCAMS installation logical Management Subsystem megabytes microcode milliseconds move MVS/ESA non-IBM operating system optical optical fiber partitioned performance physical block platter PR/SM problem processing Processor Complex RACF read-write heads reconnect record Rotational Position Sensing RPS miss seek serial shared DASD space specified Storage Class Storage Group Storage Management stored systems managed storage tion transfer update vendors virtual storage VSAM VTOC zero