Lubrication issues in magnetic disk storage devices

1996 ◽  
Vol 32 (3) ◽  
pp. 1812-1818 ◽  
Author(s):  
A.M. Homola
Keyword(s):  
Magnetic Disk ◽  
Storage Devices ◽  
Disk Storage

Dynamic Characteristics of Gas-Lubricated Slider Bearings Under High Knudsen Number Conditions

1990 ◽  
Vol 112 (1) ◽  
pp. 111-118 ◽  
Author(s):  
T. Hayashi ◽  
S. Fukui ◽  
T. Ohkubo ◽  
R. Kaneko
Keyword(s):  
Boltzmann Equation ◽  
Knudsen Number ◽  
Dynamic Characteristics ◽  
Slip Flow ◽  
Magnetic Disk ◽  
Storage Devices ◽  
Disk Storage ◽  
Slider Bearings ◽  
Lubrication Equation ◽  
Flow Approximation

This paper presents numerical analyses of the dynamic characteristics of gas-lubricated slider bearings under high Knudsen number conditions using a generalized lubrication equation based on the the Boltzmann equation. These analyses are compared with those of the slip flow approximation equations and the differences are clarified. The present analysis is applied to the dynamic response of flying head sliders for magnetic disk storage devices. For a small slider with ultra-thin spacing, the deviations of the slip flow approximation equations are remarkable in regard to steady flying characteristics, but insignificant in regard to dynamic characteristics.

Tribochemistry of lubrication issues of magnetic disk storage devices

2005 ◽  
Vol 38 (6-7) ◽  
pp. 687-691 ◽  
Author(s):  
Surender Kumar ◽  
P.K. Srivastava
Keyword(s):  
Magnetic Disk ◽  
Storage Devices ◽  
Disk Storage

scholarly journals Performance of Movable Head Disk Storage Devices with Various Disk Scheduling Algorithms

2019 ◽  
Vol 9 (2S) ◽  
pp. 486-490
Keyword(s):  
Scheduling Algorithms ◽  
Access Time ◽  
Processing Unit ◽  
Disk Scheduling ◽  
Efficient Manner ◽  
Hard Drives ◽  
Storage Devices ◽  
Disk Storage ◽  
Central Processing ◽  
The One

Hard drives are the one which needs to be accessed in an efficient manner so that it is feasible to get better recital of the central processing unit. Now a day’s magnetic disks are capable of providing more input output bandwidth yet a huge amount of this bandwidth is lost due to the access time of the hard disk. This paper discusses an analysis of performance of various disk scheduling algorithms with their merits and demerits

scholarly journals A Durable Hybrid RAM Disk with a Rapid Resilience for Sustainable IoT Devices

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2159 ◽  
Author(s):  
Sung Hoon Baek ◽  
Ki-Woong Park
Keyword(s):  
Storage System ◽  
Random Access ◽  
Solid State Drive ◽  
Storage Devices ◽  
Disk Storage ◽  
Block Level ◽  
Iot Platforms ◽  
Iot Devices ◽  
Time Required ◽  
Time Critical

Flash-based storage is considered to be a de facto storage module for sustainable Internet of things (IoT) platforms under a harsh environment due to its relatively fast speed and operational stability compared to disk storage. Although their performance is considerably faster than disk-based mechanical storage devices, the read and write latency still could not catch up with that of Random-access memory (RAM). Therefore, RAM could be used as storage devices or systems for time-critical IoT applications. Despite such advantages of RAM, a RAM-based storage system has limitations in its use for sustainable IoT devices due to its nature of volatile storage. As a remedy to this problem, this paper presents a durable hybrid RAM disk enhanced with a new read interface. The proposed durable hybrid RAM disk is designed for sustainable IoT devices that require not only high read/write performance but also data durability. It includes two performance improvement schemes: rapid resilience with a fast initialization and direct byte read (DBR). The rapid resilience with a fast initialization shortens the long booting time required to initialize the durable hybrid RAM disk. The new read interface, DBR, enables the durable hybrid RAM disk to bypass the disk cache, which is an overhead in RAM-based storages. DBR performs byte–range I/O, whereas direct I/O requires block-range I/O; therefore, it provides a more efficient interface than direct I/O. The presented schemes and device were implemented in the Linux kernel. Experimental evaluations were performed using various benchmarks at the block level till the file level. In workloads where reads and writes were mixed, the durable hybrid RAM disk showed 15 times better performance than that of Solid-state drive (SSD) itself.

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