Today, mems devices are also found in projection displays and for micropositioners in data storage systems. This paper examines the qualities of a mems basedstorage device, and based on experimental simulation, develops an understanding of the seek time characteristics on such a device. There are two works, which study the energy consumption of mems based storage devices 8,3. Systems llc a high g, mems based, deeply integrated, insgps, guidance, navigation and control flight management unit timothy m. Our isensor mems imus are highly integrated, multiaxis solutions that combine gyoscopes, accelerometers, magnetometers, pressures sensors, and additional technology for multiple degrees of freedom applica. However, as a result of this mapping, mems based storage devices lose the twodimensional property, thus further performance gains from this property are lost, especially for dataintensive applications, such as dbmss. Memsbased storage devices promise significant performance, reliability, and power improvements relative to disk drives. However, using mems based storage devices in the right way to live up to these promises presents a challenge. Power management of memsbased storage devices with the. Memsbased storage devices and standard disk interfaces. Instead of using a rotating spindle and dividing a disk into sectors, tracks and cylinders, mems based storage devices consist of a moving rectangular media sled and an array of readwrite tips. Power conservation strategies for memsbased storage.
Mems based storage devices memstores themselves consist of several thousand readwrite tips, analogous to the readwrite heads of a disk drive, which read and write data in a recording medium. Since thousands of heads can work simultaneously, it is. Data placement based on the seek time analysis of a mems. A controller manages mems devices in an enclosure and exposes a linear storage space through the interface. Memsbased storage devices memstores offer an interesting. Mems based storage devices are seen by many as promising replacements for disk drives.
Microelectromechanical systems mems 1, 2 for the actuation of a moving storage medium and for integration with electronic components. Because mems based storage devices are mechanical, some. In comparison, conventional disk drives use about 50% of their platter area for data. Mems based storage is an exciting new technology that could provide significant performance gains over current disk drive technology and at costs much lower than eeprom technology. Memsbased storage devices are seen by many as promis ing alternatives to disk drives. Because mems based storage device is a totally brandnew device, first of all, we had to make clear where the power goes when the device is working.
Operating system management of memsbased storage devices. Mems has several distinct advantages as a manufacturing technology. Building memsbased storage systems for streaming media. Like other technologies, mems based storage faces some challenges, such as the wear challenge 6, 7, 8. The results showed that standalone mems based storage devices improve the overall application run time by a factor of 1. However, as a result of this mapping, mems based storage devices lose their twodimensional property, thus fur. Moreover, manufacturing is potentially economical, since mems based storage devices can be. Pdf memsbased storage devices are seen by many as promising replacements for disk drives.
To run the device as an oscillator, this signal is amplified and applied back to the drive electrode. Mems and nems applications there are a number of current and proposed applications for mems and nems. Mems based storage devices memstores are significantly different from both disk drives and semiconductor memories. They merge at the nanoscale into nanoelectromechanical systems nems and nanotechnology. Microelectromechanical systems mems, also written as microelectromechanical systems or microelectronic and microelectromechanical systems and the related micromechatronics and microsystems constitute the technology of microscopic devices, particularly those with moving parts. However, the greatest potential for mems devices lies in new applications within telecommunications optical and wireless, biomedical and process control areas. Modeling and performance of memsbased storage devices. Mems based storage devices are seen by many as promising alternatives to disk drives. Miller university of california, santa cruz and ying lin microsoft corporation mems based storage is an emerging nonvolatile secondary storage technology. Fabricated using conventional cmos processes, mems based storage consists of thousands of small, mechanical. Mems based storage is an interesting new technology that promises to bring fast, nonvolatile, mass data storage to computer systems.
Zone based shortest positioning time first scheduling for mems based storage devices bo hong scott a. Exploiting the spring structure of mems based storage devices to reduce their shutdown energy mohammed g. Conceptual view of memsactuated data storage devices with xy motion of the. A high g, mems based, deeply integrated, insgps, guidance.
As an emerging nonvolatile secondary storage technology, mems based storage exhibits several desirable properties including high performance, high storage volumic density, low power consumption, low entry cost, and small form factor. Fast configuration of memsbased storage devices for. Using memsbased storage devices in computer systems. Pdf using memsbased storage in computer systemsdevice. Researchers at the carnegie mellon university carley et al. Mems seminar ppt with pdf report mems are small merged devices or systems that combine electrical and mechanical components. Fabricated on cmos, mems based storage uses thousands of small, mechanical probe tips to access gigabytes of. Mems enclosures are the basic building block of mems based storage systems, just as disks in disk based systems.
Mems based storage devices promise significant performance, reliability, and power improvements relative to disk drives. Like disks, memsbased storage devices will have mechanical and layout characteristics that will determine their performance for given workloads. Using memsbased storage in computer systems device. Mems devices provide nonvolatile storage using either physical 20 or magnetic 1 recording techniques to achieve extremely high density storage.
An introduction to mems microelectromechanical systems. Pdf memsbased integratedcircuit massstorage systems. Previous work focuses on deploying mems based storage devices as a cache or a replacement for disk drives in server systems 8, 9, 10. Mems based storage devices should also be energy e cient for deployment in mobile systems. An overview on memsbased storage, its research issues and.
Using mems based storage in computer systems device modeling and management. Using mems based storage to improve storage system performance has been studied in several researches. Fabricated on cmos, memsbased storage uses thousands. Peterson storage systems research center jack baskin school of engineering university of california, santa cruz abstract access latency to secondary storage devices is.
The duty of computer scientists and engineers is then to integrate these new devices into memory hierarchy and optimize their performances for most applications. They both propose mems devices which would be fabricated onchip but would use a springmounted media sled as a storage medium. Scope this document contains a set of failure mechanism based stress tests specific to the micro electromechanical system mems pressure sensor technologies listed in section 1. The role of mems storage enclosures in storage systems is exactly the same as disksproviding reliable persistent storage. In this work, we focus on mems based gyroscopes which are devices for measuring the yaw rate. Memsbased storage devices memstores are radically different from todays. Pdf operating system management of memsbased storage. Introduction new storage devices based on microelectromechanical systems mems have been proposed 3. In general, disks have much higher storage capacities than mems storage devices. In the following subsections, we summarized the whole power consumption distribution in different states of mems based storage device. Modeling and scheduling of memsbased storage devices dtic. The differences motivate the question of whether they need new abstractions to be utilized by systems, or if existing abstractions will be sufficient.
First, the algorithm should exploit the parallelism of mems based storage. Design and simulation of mems based piezoelectric vibration energy harvesting system m. It can store anywhere from 160 gigabytes to 2 terabytes. Mems based storage devices have a large number of heads, and to deliver peak performance, all heads must be deployed simultaneously to access each single sector.
Memsbased gyroscopes as physical unclonable functions. Properties of mems based storage devices include high storage density, small form factor, and low power 3, 4. Using mems based storage in computer systems device modeling and management article pdf available in acm transactions on storage 22. Pdf modeling and performance of memsbased storage devices. Mems sensors are silicon based devices which combine a microcontroller with a mechanical device used to measure a variety of different physical quantities ranging from acceleration and yaw rate to magnetic. Reliability of mems based storage enclosures mems based storage can replace disks in storage systems, especially in mobile computing and highend systems where size and power or performanceare important. Pdf modeling and scheduling of memsbased storage devices. Storage devices secondary storage hard disk the hard disk drive is the main, and usually largest, data storage device in a computer. Zonebased shortest positioning time first scheduling for. Policies for probewear leveling in memsbased storage. What is mems microelectromechanical systems technology.
Memsbased storage devices are a new technology that is significantly different from both disk drives. Micro electro mechanical systems are attractive for many applications because of their small size and weight, which allow systems to be miniaturized. These characteristics then allow us to identify equivalent. Parameterized mems performance prediction models 6, 22 were also proposed to narrow the design space of mems based storage. The mathematical model of a mems based piezoelectric vibration energy harvesting device was designed and the finite element analysis. Fabricated using conventional cmos processes, mems based storage. The problem is that mems based storage devices are mechanical, and thus consume a large amount of energy when idle. Exploiting the spring structure of memsbased storage. Using mems based storage in computer systemsmems storage architectures article pdf available in acm transactions on storage 21.
This paper compares and contrasts these two storage technologies and explores how the physical characteristics of mems based. Pdf the article focuses on microelectromechanical systems mems based. Pdf using memsbased storage in computer systemsmems. A new class of secondary storage devices based on microelectromechanical systems mems 1, 6, 11 currently being developed promise seek times 1020 times faster than hard drives, storage. Also these smart systems cannot be just limited to silicon based technologies, but rather polymer based technologies. Mems and probebased mass data storage in conventional. Using mems based storage in computer systems device modeling and management bo hong symantec corporation scott a. This paper begins to examine the access qualities of a memsbased storage device, and based on experimental simulation, develops an understanding of the seek time characteristics of such a device. Modeling a mems probe based storage device maria varsamou1, angeliki pantazi2 and theodore antonakopoulos1 1department of electrical and computer engineering, university of patras, greece email. Mems based mass data storage featuring low power, high storage capacity, and miniaturized size can be used in mobile computing devices to provide a quantum leap for the storage capacity of nonvolatile memory which is now mainly served by flashmemory chips. Hard disk speed is the speed at which content can be read and written on a hard disk.