NDLI: Load/Unload technology for disk drives

Content Provider	IEEE Xplore Digital Library
Author	Albrecht, T.R. Sai, F.
Copyright Year	1965
Abstract	Load/Unload (L/UL) is an alternative to contact start-stop (CSS) technology which eliminates stiction and wear failure modes associated with CSS. Other benefits of L/UL include increased areal density due to smooth disk surfaces, thinner overcoats and lower head flying height; improved shock resistance due to elimination of head slap; and reduced power consumption. Several mechanical design options exist for L/UL, and tolerance analysis plays a key role in height budgeting, interdisk spacing, and disk real estate usage. To prevent stiction failures arising from unintended landing of heads on stopped disks, a reliable actuator latch and power-off retract system are employed. A bidirectional inertia latch has better reliability than conventional inertia latch designs. A low voltage drop retract rectifier is required for reliable power-off retract in drives with supply voltages of 5 V or less.
Sponsorship	IEEE Magnetics Society
Starting Page	857
Ending Page	862
Page Count	6
File Size	725300
File Format	PDF
ISSN	00189464
Volume Number	35
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Disk drives Power system reliability Cascading style sheets Surface resistance Electric shock Energy consumption Tolerance analysis Actuators Low voltage Rectifiers
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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