3,018 research outputs found

    Solid State Drive

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    This project documents the design and implementation of a solid state drive (SSD). SSDs are a non-volatile memory storage device that competes with hard disk drives. SSDs rely on flash memory, a type of non-volatile memory that is electrically erased and programmed. The appeal of SSDs lies in the fact that they allow a fast, reliable, and durable memory storage device. The goal of this project is to have a working external SSD built from scratch

    Radiation-Hardened Solid-State Drive

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    A method is provided for a radiationhardened (rad-hard) solid-state drive for space mission memory applications by combining rad-hard and commercial off-the-shelf (COTS) non-volatile memories (NVMs) into a hybrid architecture. The architecture is controlled by a rad-hard ASIC (application specific integrated circuit) or a FPGA (field programmable gate array). Specific error handling and data management protocols are developed for use in a rad-hard environment. The rad-hard memories are smaller in overall memory density, but are used to control and manage radiation-induced errors in the main, and much larger density, non-rad-hard COTS memory devices. Small amounts of rad-hard memory are used as error buffers and temporary caches for radiation-induced errors in the large COTS memories. The rad-hard ASIC/FPGA implements a variety of error-handling protocols to manage these radiation-induced errors. The large COTS memory is triplicated for protection, and CRC-based counters are calculated for sub-areas in each COTS NVM array. These counters are stored in the rad-hard non-volatile memory. Through monitoring, rewriting, regeneration, triplication, and long-term storage, radiation-induced errors in the large NV memory are managed. The rad-hard ASIC/FPGA also interfaces with the external computer buses

    Solid State Drive: New Challenge for Forensic Investigation

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    There has been a tremendous increase in the usage of electronic devices day by day. With the increase in usage of electronic devices, technology keeps on emerging. Due to the emergence of new technologies, there has always been a scope for the hackers to cash the loopholes that are available which resulted in a hefty increase in cyber crimes. Consequently, the number of investigations that require digital forensic expertise have been resulting in a huge evidence backlogs that are being encountered by the law enforcement agencies all over the world. It is anticipated that the number of cases that would require digital forensics is likely to be increased in future. The primary storage technology used for digital information has remained constant over the last two decades in the form of the magnetic disc. For decades, Hard drives have been dominating the market due to their cost and capacity. However, things are being developed and manufactured to be faster and smaller but there are few changes that truly turned to be technological revolutionary. Solid states drive familiarly known as SSD have crept up on us as they arrive under cover of the previously known technology. This paper demonstrated that the assumptions about the behavior of a storage media are no longer valid, how modern storage devices will operate under their own volition without any computer instructions. These operations are highly destructive of traditionally recoverable data. This would contaminate evidence, can make validation of digital evidence reports difficult, it can complicate the process of live and dead analysis recovery and can also complicate and frustrate the post recovery forensic analysis. This paper compared the key evidence that were identified in an HDD and SSD and discussed the key features that make SSD self-Destructive and cause difficulties for Forensic Investigations

    Analysis of The Typical Performance Routines for Recovering Data from Solid State Drive During a Forensic Acquisition

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    Analysis of The Typical Performance Routines for Recovering Data from Solid State Drive During a Forensic Acquisitio


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    State Drive (SSD) is an alternative to data storage that is popular today, widely used as a media cache to speed up data access to the hard disk (HDD). This paper proposes page replacement technique on SSD cache that used frequency and recency parameter, alternately. The algorithm is selected adaptively based on trace input. This method helps to overcome changes in access patterns while minimizing the number of write processes to SSD. The proposed algorithm can choose a replacement technique that suits the user access pattern so that it can bring a better hit rate. The proposed algorithm is also integrated with the ghost-cache mechanism so that the reduction in the number of writing processes to SSD is significant. The experiment runs using a real dataset, describing trace of data read, and data write taken from real usage. The trial shows that the proposed algorithm can give good results compared to other similar algorithms

    Modeling of Rf Interference Caused by Solid-State Drive Noise

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    In this paper, modeling of RFI problem caused by a solid-state drive (SSD) in a laptop is proposed. Two noise sources (one outside and one inside a cavity) in the SSD are reconstructed as dipole moments with magnitude-only near-field scanning data. The dipole moment inside a cavity is then replaced by a Huygens\u27 box covering four side surfaces of the cavity using a numerical simulation. The noise voltage at an RF antenna port is calculated by combining the two reconstructed noise sources with measured transfer functions. The model is successfully validated through a comparison of the calculation with measurement results

    SSD Forensic: Evidence Generation And Forensic Research On Solid State Drives Using Trim Analysis

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    Traditional hard drives consisting of spinning magnetic media platters are becoming things of the past as with the emergence of the latest digital technologies and electronic equipment, the demand for faster, lighter, and more reliable alternate storage solutions is imperative. To attain these requirements, flash storage technologies like Solid State Drive (SSD) has overtaken traditional hard disk drives. In a forensic analysis of flash storage devices, forensic investigators are facing severe challenges for the reason that the sovereign behavior of solid-state storage media does not look favorable compared to traditional storage media devices. Wear Leveling, a fundamental mechanism in Solid State Drive (SSD), plays a severe challenge that most often destroys forensic evidence in many cases. It makes it complicated for forensic investigators to recover the necessary evidence. Persistence of deleted data in flash storage media depends on various factors like the Garbage Collection process, TRIM command, flash media type, manufacturer, capacity, file system, type of file saved, and the Operating System, etc. In view of this, extensive experiments conducted to identify the probability of data recovery and carving. Analyzed effects of Wear Leveling and Garbage Collection processes in Solid State Drive (SSD) of different manufacturers, having the same storage capacities and with a different type of files utilized. In conclusion, experimental findings established the fact that Wear Leveling in solid-state media can obfuscate digital evidence, and a conventional assumption regarding the behavior of storage media is no more valid. Moreover, data persistency also depends on the manufacturers, time-lapse of forensic analysis after data deletion, type of files, and size of files stored in Solid State Drives (SSD)
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