Inside Solid State Drives (SSDs) by Rino Micheloni, Alessia Marelli, Kam Eshghi PDF

By Rino Micheloni, Alessia Marelli, Kam Eshghi

ISBN-10: 9400751451

ISBN-13: 9789400751453

Springer sequence in complicated MICROELECTRONICS

Solid country Drives (SSDs) are gaining momentum in firm and shopper purposes, changing hard disk drive Drives (HDDs) via supplying greater functionality and decrease energy. within the firm, builders of information middle server and garage structures have noticeable CPU functionality turning out to be exponentially for the earlier 20 years, whereas HDD functionality has more desirable linearly for a similar interval. also, multi-core CPU designs and virtualization have elevated randomness of garage I/Os. those developments have shifted functionality bottlenecks to firm garage structures. enterprise serious functions resembling on-line transaction processing, monetary information processing and database mining are more and more constrained by means of garage performance.

In purchaser purposes, small cellular structures are leaving little room for batteries whereas tough lengthy existence out of them. consequently, lowering either idle and energetic strength intake has turn into severe. also, patron garage structures are short of major functionality development in addition to assisting small powerful shape elements. finally, purchaser platforms are optimizing for most sensible performance/power ratio in addition to performance/cost ratio.

SSDs promise to deal with either company and shopper garage specifications by way of significantly enhancing functionality whereas whilst decreasing power.

Inside sturdy country Drives walks the reader via the entire major subject matters regarding SSDs: from NAND Flash to reminiscence controller (hardware and software), from I/O interfaces (PCIe/SAS/SATA) to reliability, from errors correction codes (BCH and LDPC) to encryption, from Flash sign processing to hybrid garage. we are hoping you get pleasure from this travel inside of reliable kingdom Drives.

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Extra info for Inside Solid State Drives (SSDs)

Sample text

In multi-RC systems, more than one processor sub-system exists within a PCIe tree. For example, a second Root Complex may be added to the system via the DP 2 SSD Architecture and PCI Express Interface 35 Fig. 18 PCIe tree topology PCI-PCI Bridge Virtual Root Complex PCI Bus PCI-PCI Bridge PCI-PCI Bridge UP PCIe Switch DP UP DP Endpoint PCIe Switch DP Endpoint DP Endpoint DP DP Endpoint Endpoint of a PCIe switch, possibly to act as a warm stand-by to the primary RC. However, an issue arises when the second RC also attempts the enumeration process: it sends out Configuration Read Messages to discover other PCIe devices on the system.

Although Flash-based SSDs are limited by write endurance of 100 k cycles per block, the write endurance can be extended if the specifications for retention are made less stringent. In transaction-oriented applications, the SSD is acting as temporary store for data, meaning that data retention of weeks could be acceptable. In such a case, the block write endurance can be extended to one million cycles per block. 2 Video Server Video-on-demand (VOD) is becoming more prevalent as the bandwidth of home broadband connections improves.

4). g. mobile phones need very small-sized removable media like SD. SSDs are the emerging application for NAND. A SSD is a complete, small system where every component is soldered on a PCB and is independently packaged: NANDs are usually available in TSOP packages. A basic block diagram of solid state disk is shown in Fig. 1. In addition to memories and a controller, there are usually other components. For instance, an Fig. 1 Block diagram of a SSD 2 SSD Architecture and PCI Express Interface 21 external DC-DC converter can be added in order to derive the internal power supply, or a quartz can be used for a better clock precision.

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Inside Solid State Drives (SSDs) by Rino Micheloni, Alessia Marelli, Kam Eshghi


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