DASD/D.A.S.D. (Direct Access Storage Device)
Some information I found on the net:
http://www.cs.ruu.nl/wais/html/na-dir/arch-storage/part1.html:
"Mainframe disks are sometimes referred to
as SLEDs (Single Large Expensive Disks). The
term DASD (Direct Access Storage Device)
usually refers to a mainframe disk, but
is occassionally applied to any hard
disk."
http://www.linuxguruz.org/foldoc/foldoc.php?DASD
"Direct-Access Storage Device
(DASD) IBM mainframe terminology
for a disk drive, in contrast with a tape
drive which is a sequential access device."
http://www-1.ibm.com/servers/eserver/iseries/windowsintegration/ntfaqdasd.htm
"AS/400 Integration for Windows Server
FAQ - DASD Information"