SSD - Solid State Drive PPT by Shyam jos

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A college seminar on SSD - Solid State Drive download the missing video in the slide from here http://youtu.be/-Z5isAwqb2c

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Solid State Drive (SSD):

Solid State Drive (SSD) Presented By: Shyam Jos

Contents:

Contents Introduction Form factor Architecture & Function SSD vs HDD – Start-Up Test Technical Comparison of SSD & HDD Advantages Disadvantages SSD Applications Conclusion

Introduction:

Introduction In 1995 , M-Systems introduced first flash-based solid-state drives. A solid-state drive (SSD) is a data storage device  that uses solid state memory to store persistent data and SSDs use same I/O interfaces developed for hard disk drives. SSDs do not have any moving mechanical components, which distinguishes them from traditional magnetic disks such as hard disk drives (HDDs). SSDs use NAND-based flash memory or DRAM to store data.

Form Factor:

Form Factor Standard HDD form factors Box form factors Bare-board form factors Ball grid array form factors

Form Factor:

Form Factor Standard HDD form factors – is equal to size of traditional HDD form factors like 3.5", 2.5” 2.55’’ HDD form factor

Form Factor:

Form Factor Box form factors – mainly used by DRAM based SSDs ,as they need external power supply or battery pack. Box form factor

Form Factor:

Form Factor Bare-board form factors - Form factor which were more common to memory modules(RAM) Bare-board form factor

Form Factor:

Form Factor Ball grid array form factors - small chip package size to fit into Embeded systems Bare-board form factor

Architecture & Function:

Architecture & Function Block Diagram

Memory:

Memory Flash memory-based SSDs: use non-volatile NAND flash memory Ability to retain the data without a constant power supply lower cost compared to DRAM Flash memory SSDs are slower than DRAM solutions. DRAM-based SSDs: Based on volatile memory such as DRAM internal battery or an external AC/DC adapter is needed to hold the data ultrafast data access primarily to accelerate applications Higher cost compared to NAND flash memory

Controller:

Controller The controller is an embedded processor and executes firmware-level code. Functions: Error correction (ECC) Wear leveling Bad block mapping Read scrubbing and read disturb management Read and write caching Garbage collection Encryption

Cache or Buffer::

Cache or Buffer: A flash-based SSD typically uses a small amount of DRAM as a cache, similar to the cache in hard disk drives.

Host interface:

Host interface Serial ATA (SATA) SAS - Serial attached SCSI (generally found on servers) PCI Express Fibre Channel (almost exclusively found on servers) USB Parallel ATA (IDE) interface (mostly replaced by SATA)

SSD vs HDD - Start-Up Speed Test :

SSD vs HDD - Start-Up Speed Test This video shows the speed differeence between a solid state drive and standard hard drive on a Windows 7 PC.

Technical Comparison of SSD & HDD :

Technical Comparison of SSD & HDD Solid-state drive Hard disk drive Random access time 0.1 ms Random access time 5~10 ms Read latency time Very low Read latency time high 100MB/s to 500MB/s 50MB/s to 100MB/s. High Reliability SSDs have no moving parts to fail mechanically. Low Reliability HDDs have moving parts and are subject to sudden failure; small and light in weight. relatively large and heavy In 2013 SSDs were available in sizes up to 512GB, In 2013 HDDs of up to 4TB were available. power consuption 2 watts 12 watts. As of 2013 NAND flash SSDs cost about Rs.31000 for 500GB As of 2013 HDDs cost about Rs.3200 for 500GB drives

Advantages:

Advantages High performance – siginificantly faster than a standard HDD Faster seek time – upto 60x faster than HDD Higher reliablity – no moving parts,can withstand 1500Gs operating shock Lower power – Lesser power consuption ,cooler operation Silent operation – ideal for post production enviornments Lighter weight – perfect for portable devices Wider operating Temp. - 0c – 70c

Disadvantages:

Disadvantages They are more expensive than traditional hard drives They currently offer less storage space than traditional hard drives. Slower Write Speed on low-end Models(MLC based types)

SSD Applications:

SSD Applications Servers Desktop computers Laptops Ultrabooks HD Camcorders Smart Tv CCTV Digital Video Recorder (DVR) Set-Top Boxes Gaming Consoles

Conclusion:

Conclusion Faster Data Access Less Power Usage Higher Reliability Latest high-end laptops and ultrabooks now comes with SSD In comming years SSD Will Replace Hard Disk Drives

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