Nachos 2 – Extra Points Equipo: Carlos Eduardo Triana Sarmiento Jonathan Alvarado Mata Obed David Guevara Ibarra  
Cache <ul><li>Cache memory is a type of memory, cache memory saves all data that computer needs to work. </li></ul><ul><li...
<ul><li>The cache can be a reserved area of main memory, like a high-speed storage. </li></ul><ul><li>Two types of cache: ...
<ul><li>The cache acts as a summary of data RAM, and we all know that a 500 page summary is not at all useful. </li></ul><...
Hard Disk Drive Hard Disks are coated whit a thin magnetic layer, usually of iron oxide.
Cylinders : concentric circles starting at the outside and end on the inside. Tracks : These are the lines of the disk. Se...
Cluster :  Is the length of the track taken as a processing unit in each read or write to the disk, which is equivalent to...
Drive size (MB) FAT type (bits) Sectors per cluster Cluster size (KB) 0-15 12 8 4 16-127 16 4 2 128-255 16 8 4 256-511 16 ...
Latency on a Hard Disk <ul><li>There are a number of factors related to speed hard drives to understand its operation. </l...
<ul><li>The latency depends on the speed of rotation and is equal to half the time it takes to describe the disk full turn...
Solid State Drive <ul><li>A solid state drive or SSD (Solid State Drive) is a data storage device that uses a nonvolatile ...
<ul><li>   </li></ul><ul><li>Advantages </li></ul><ul><ul><li>Faster startup, having no need to take courses at a constant...
<ul><ul><li>No noise : The same lack of mechanical parts makes them completely inaudible. </li></ul></ul><ul><ul><li>Resis...
<ul><li>    Limitations: </li></ul><ul><ul><li>Price : The flash memory prices are considerably higher in price / gigabyt...
SATA vs ATA <ul><li>A SATA hard drive is an electromechanical device that is responsible to store and read large volumes o...
<ul><li>The SATA hard disk can have two measures: </li></ul><ul><ul><li>3.5 inches (3.5&quot;), for internal hard drives f...
NTFS File System <ul><li>NTFS (New Technology File System) is a file system included in Windows NT versions of Windows 200...
FAT 16 File System <ul><li>This is the file system introduced by Microsoft in 1987 to support 16bit files.  </li></ul><ul>...
Fuentes <ul><li>http://www.conozcasuhardware.com/quees/memcache.htm </li></ul><ul><li>http://www.pchardware.org/discos/dis...
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Nachos Extra Points

Published on: Mar 3, 2016
Published in: Technology      
Source: www.slideshare.net


Transcripts - Nachos Extra Points

  • 1. Nachos 2 – Extra Points Equipo: Carlos Eduardo Triana Sarmiento Jonathan Alvarado Mata Obed David Guevara Ibarra
  • 2. Cache <ul><li>Cache memory is a type of memory, cache memory saves all data that computer needs to work. </li></ul><ul><li>But was not the RAM? </li></ul><ul><li>Well, partly yes. The computer's  main memory(RAM) and cache memory are basically the same in many respects, the difference is the use that is given to the cache. </li></ul><ul><li>The main feature of the cache is very fast, about 5 or 6 times the RAM. </li></ul>
  • 3. <ul><li>The cache can be a reserved area of main memory, like a high-speed storage. </li></ul><ul><li>Two types of cache: </li></ul><ul><ul><li>Cache: a memory of high speed static RAM </li></ul></ul><ul><ul><li>Disk cache </li></ul></ul><ul><li>The cache is effective because the programs access again and again to the same data or instructions. </li></ul><ul><li>Keeping this information in SRAM, the computer avoids accesing main memory. </li></ul>
  • 4. <ul><li>The cache acts as a summary of data RAM, and we all know that a 500 page summary is not at all useful. </li></ul><ul><li>The ideal size depends on the RAM and the following table shows it: </li></ul>RAM(Mb) Cache(Kb) 1 a 4 128 o 256 4 a 12 256 12 a 32 512 mas de 32 512 o 1024
  • 5. Hard Disk Drive Hard Disks are coated whit a thin magnetic layer, usually of iron oxide.
  • 6. Cylinders : concentric circles starting at the outside and end on the inside. Tracks : These are the lines of the disk. Sectors : Each track on the disk is divided in sectors.
  • 7. Cluster :  Is the length of the track taken as a processing unit in each read or write to the disk, which is equivalent to the length of a sector on floppy disks or set of 4 or 8 contiguous sectors on disk hard. To write, head is positioned over the cell to record and passed through it a current pulse, which creates a magnetic field on the surface. When reading data from disk is passed over the area that is required and will detect a magnetic field as found magnetized in one direction or another, indicate whether the position is stored in a 0 or a 1.  In writing case is reversed, the head is a current which causes a magnetic field and depending of the sense of this place a 0 or 1.
  • 8. Drive size (MB) FAT type (bits) Sectors per cluster Cluster size (KB) 0-15 12 8 4 16-127 16 4 2 128-255 16 8 4 256-511 16 16 8 512-1023 16 32 16 1024-2048 16 64 32
  • 9. Latency on a Hard Disk <ul><li>There are a number of factors related to speed hard drives to understand its operation. </li></ul><ul><ul><li>Time track search </li></ul></ul><ul><ul><li>Speed of rotation </li></ul></ul><ul><ul><li>Access time average </li></ul></ul><ul><li>Latency : time it takes for the needle to be placed in the desired sector  </li></ul><ul><li>Transfer rate:  rate at which data (bits) can be transferred from disk to the central unit. It depends on the rotational speed and density data storage on a track </li></ul>
  • 10. <ul><li>The latency depends on the speed of rotation and is equal to half the time it takes to describe the disk full turn. </li></ul><ul><li>Some of the fastest models now have disks that rotate at 10000 rpm more to reduce latency. </li></ul>rpm 1 turn every latency 3699 16,66 mseg 8,33 mseg 4500 13,33 mseg 6,66 mseg 5400 11,11 mseg 5,55 mseg 7200 8,33 mseg 4,16 mseg 10000 6,00 mseg 3,00 mseg
  • 11. Solid State Drive <ul><li>A solid state drive or SSD (Solid State Drive) is a data storage device that uses a nonvolatile memory such as flash memory or a volatile memory such as SDRAM, to store data, instead of turntables found in magnetic hard drives. Solid state drives have a lower access time and latency. </li></ul><ul><li>They are easily interchangeable without having to use adapters or expansion cards to make them compatible with the equipment.  </li></ul>
  • 12. <ul><li>   </li></ul><ul><li>Advantages </li></ul><ul><ul><li>Faster startup, having no need to take courses at a constant speed. </li></ul></ul><ul><ul><li>Great write to speed. </li></ul></ul><ul><ul><li>Faster reading, even 10 times more than traditional hard disks through internal RAIDs on the same SSD.  </li></ul></ul><ul><ul><li>Low latency read and write. </li></ul></ul><ul><ul><li>Application launch and boot in less time. Results of the faster read speed and especially the search time. But only if the application resides in flash. </li></ul></ul><ul><ul><li>Lower power consumption and heat production. Result of having no mechanical elements. </li></ul></ul>
  • 13. <ul><ul><li>No noise : The same lack of mechanical parts makes them completely inaudible. </li></ul></ul><ul><ul><li>Resistant : Can withstand falling, shock and vibration without spoiling and without uncalibrated.  </li></ul></ul><ul><ul><li>More secure and unrecoverable deleted data.  </li></ul></ul>
  • 14. <ul><li>    Limitations: </li></ul><ul><ul><li>Price : The flash memory prices are considerably higher in price / gigabyte, the main reason for low demand. However, this is not a technical disadvantage.  </li></ul></ul><ul><ul><li>Low recovery : After a physical failure data are completely lost because the cell is destroyed. </li></ul></ul><ul><ul><li>Capacity : They have less capacity than a conventional hard drive, which reaches more than three Terabytes. </li></ul></ul><ul><ul><li>The number of read and write cycles of these units is reduced as reducing the size of the memory transistors, so the latest have a lower total lifetime. </li></ul></ul>
  • 15. SATA vs ATA <ul><li>A SATA hard drive is an electromechanical device that is responsible to store and read large volumes of information at high speeds. </li></ul><ul><li>The ceramic disks are mounted on a shift that rotates at high speeds. </li></ul><ul><li>Such disks have a feature called &quot;Hot swappable&quot;, which means it can connect and disconnect without turning off the computer. </li></ul><ul><li>The ATA standard was originally designed ton connect hard disks, however, developed an extension called ATAPI (ATA Packet Interface) interface that allows other storage peripherals (CD-ROM, DVD-ROM drives, etc) in ATA interface. </li></ul>
  • 16. <ul><li>The SATA hard disk can have two measures: </li></ul><ul><ul><li>3.5 inches (3.5&quot;), for internal hard drives for desktop computers. </li></ul></ul><ul><ul><li>2.5&quot; internal hard drives for laptops (Notebook). </li></ul></ul><ul><li>Unit is the byte, but currently used measures like Gigabyte (GB) and Terabytes (TB). For SATA HDD this data can be 80 GB to 400 GB. </li></ul>
  • 17. NTFS File System <ul><li>NTFS (New Technology File System) is a file system included in Windows NT versions of Windows 2000, Windows XP, Windows Server 2003, Windows Server 2008, Windows Vista and Windows 7. </li></ul><ul><li>  It is based on the HPFS file system from IBM / Microsoft, and also has some influences from the HFS file format designed by Apple. </li></ul><ul><li>NTFS allows you to define the cluster size, from 512 bytes (minimum size of a sector) independently of the size of the partition. </li></ul>
  • 18. FAT 16 File System <ul><li>This is the file system introduced by Microsoft in 1987 to support 16bit files.  </li></ul><ul><li>It was designed originally to handle files in a &quot;floppy drive&quot;. </li></ul><ul><li>This file system has a very important set of limitations, among which the maximum of 2GB partition, using cluster 32Kb or 64Kb and not support long names files. </li></ul><ul><li>FAT16 does not support compression and encryption.   </li></ul><ul><li>  </li></ul>
  • 19. Fuentes <ul><li>http://www.conozcasuhardware.com/quees/memcache.htm </li></ul><ul><li>http://www.pchardware.org/discos/discoacceso.php </li></ul><ul><li>http://www.monografias.com/trabajos14/discosduros/discosduros.html   </li></ul><ul><li>http://es.wikipedia.org/wiki/Unidad_de_estado_s%C3%B3lido#Ventajas </li></ul><ul><li>http://sistemas.itlp.edu.mx/tutoriales/admonarch/tema1_7.htm </li></ul>

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