Mass Storage Systems - Revision history

Chechu 17: /* Links to online shops (U.K and U.S) */

2017-12-15T11:02:57Z

‎Links to online shops (U.K and U.S)

Chechu 17: /* Links to online shops (U.K and U.S) */

2017-12-15T11:02:04Z

‎Links to online shops (U.K and U.S)

Chechu 17: /* Links to online shops (U.K and U.S) */

2017-12-15T11:00:59Z

‎Links to online shops (U.K and U.S)

Andresgarcia: /* Types */

2017-12-14T17:04:39Z

‎Types

Andresgarcia: /* Types */

2017-12-14T16:59:35Z

‎Types

Andresgarcia: /* Evolution */

2017-12-14T16:55:13Z

‎Evolution

Andresgarcia: /* Types */

2017-12-14T16:14:06Z

‎Types

Andresgarcia at 16:12, 14 December 2017

2017-12-14T16:12:13Z

Andresgarcia: /* Types */

2017-12-14T12:33:55Z

‎Types

Chechu 17: /* Links to online shops (U.K and U.S) */

2017-12-14T12:22:13Z

‎Links to online shops (U.K and U.S)

@@ Line 56: / Line 56: @@
 *[https://www.amazon.es/WD-Elements-Disco-externo-port%C3%A1til/dp/B06W55K9N6/ref=lp_937903031_1_4/258-2947339-8041632?s=computers&ie=UTF8&qid=1513252928&sr=1-4.php&th=1.php WD Elements - Disco duro externo portátil de 2 TB con USB 3.0]
-*[https://www.amazon.es/WD-My-Passport-seguridad-autom%C3%A1tica/dp/B01LQQH86A/ref=pd_cp_147_1?_encoding=UTF8&psc=1&refRID=56AA5522XBEAWRGZT7YM.php WD My Passport - Disco duro portátil de 4 TB y software de copia de seguridad automática]
+*[https://www.amazon.es/Toshiba-N300-Disco-interno-7200rpm/dp/B01MR6Y13P/ref=sr_1_17_sspa?ie=UTF8&qid=1513335685&sr=8-17-spons&keywords=disco+memoria&psc=1.php Toshiba N300 - Disco duro interno de 8 TB ]
 *[https://www.amazon.es/Toshiba-Hayabusa-Memoria-color-blanco/dp/B014VM3G3U/ref=sr_1_5?ie=UTF8&qid=1513335685&sr=8-5&keywords=disco+memoria.php Toshiba Hayabusa - Memoria USB 2.0 de 32 GB]

@@ Line 58: / Line 58: @@
 *[https://www.amazon.es/WD-My-Passport-seguridad-autom%C3%A1tica/dp/B01LQQH86A/ref=pd_cp_147_1?_encoding=UTF8&psc=1&refRID=56AA5522XBEAWRGZT7YM.php WD My Passport - Disco duro portátil de 4 TB y software de copia de seguridad automática]
-*[https://www.amazon.es/Toshiba-Canvio-Basics-Disco-externo/dp/B00KWHJVCY/ref=pd_cp_147_2?_encoding=UTF8&psc=1&refRID=4WSY92F4J73FQ0B3F88T.php Toshiba Canvio Basics - 2TB]
+*[https://www.amazon.es/Toshiba-Hayabusa-Memoria-color-blanco/dp/B014VM3G3U/ref=sr_1_5?ie=UTF8&qid=1513335685&sr=8-5&keywords=disco+memoria.php Toshiba Hayabusa - Memoria USB 2.0 de 32 GB]
 *Depending on the type of storage or the type of systems  it can be already the brand, the size of storage or the configuration of the same one as safety copies the price can change.
 =4 questions=

@@ Line 60: / Line 60: @@
 *[https://www.amazon.es/Toshiba-Canvio-Basics-Disco-externo/dp/B00KWHJVCY/ref=pd_cp_147_2?_encoding=UTF8&psc=1&refRID=4WSY92F4J73FQ0B3F88T.php Toshiba Canvio Basics - 2TB]
-*Depending on the type of storage be already the brand, the size of storage or the configuration of the same one as safety copies the price can change.
+*Depending on the type of storage or the type of systems  it can be already the brand, the size of storage or the configuration of the same one as safety copies the price can change.
 =4 questions=

@@ Line 3: / Line 3: @@
 Common types of mass storage include:
 ==Solid State Drive==
 The Solid State Drive (SSD) is '''a type of data storage device that uses non-volatile memory to store data''', instead of the magnetic disks or disks of conventional hard disk drives.
 ==Hard Drives==
 The hard disk drive '''is the data storage device that uses a magnetic recording system to store digital files'''. '''It consists of one or more plates joined by a same axis that rotates at high speed''' inside a sealed metal box. On each plate, and on each of its faces, there is a read / write head that floats on a thin sheet of air generated by the rotation of the discs. It is non-volatile memory.
 ==External Hard Drives==
 An external drive is just '''a hard drive or solid-state drive that is connected to a computer''' on the outside rather than on the inside.
 ==Optical drives==
 The optical disk unit is '''the disk unit that uses a laser light as part of the process of reading or writing data''' from a file to optical discs through beams of light that interpret the refractions caused on its own emission.
 ==Tape drives==
 A tape drive is a '''storage device that reads and writes data on a magnetic tape'''. Magnetic tape data storage '''is typically used for offline''', archival data storage. Tape media generally has a favourable unit cost.
 ==RAID storage==
 '''RAID, Redundant Array Independent Disks is a data storage virtualization technology that combines multiple physical disk drive components into one''' or more logical units for the purposes of data redundancy, performance improvement.
 ==USB==
 The USB (Universal Serial Bus) '''is accessible to a host computing device and enables file transfers between the host and the USB device'''. To a host, the USB device acts as an external hard drive.
 ==Flash Memory Card==
 A flash memory card is '''a small storage device that uses nonvolatile semiconductor memory to store data on portable or remote computing devices'''.

@@ Line 3: / Line 3: @@
 Common types of mass storage include:
 ==Solid State Drive==
-The Solid State Drive (SSD) is a type of data storage device that uses non-volatile memory to store data, instead of the magnetic disks or disks of conventional hard disk drives.
+The Solid State Drive (SSD) is '''a type of data storage device that uses non-volatile memory to store data''', instead of the magnetic disks or disks of conventional hard disk drives.
 ==Hard Drives==
-The hard disk drive is the data storage device that uses a magnetic recording system to store digital files. It consists of one or more plates joined by a same axis that rotates at high speed inside a sealed metal box. On each plate, and on each of its faces, there is a read / write head that floats on a thin sheet of air generated by the rotation of the discs. It is non-volatile memory.
+The hard disk drive '''is the data storage device that uses a magnetic recording system to store digital files'''. '''It consists of one or more plates joined by a same axis that rotates at high speed''' inside a sealed metal box. On each plate, and on each of its faces, there is a read / write head that floats on a thin sheet of air generated by the rotation of the discs. It is non-volatile memory.
 ==External Hard Drives==
-An external drive is just a hard drive or solid-state drive that is connected to a computer on the outside rather than on the inside.
+An external drive is just '''a hard drive or solid-state drive that is connected to a computer''' on the outside rather than on the inside.
 ==Optical drives==
-The optical disk unit is the disk unit that uses a laser light as part of the process of reading or writing data from a file to optical discs through beams of light that interpret the refractions caused on its own emission.
+The optical disk unit is '''the disk unit that uses a laser light as part of the process of reading or writing data''' from a file to optical discs through beams of light that interpret the refractions caused on its own emission.
 ==Tape drives==
-A tape drive is a storage device that reads and writes data on a magnetic tape. Magnetic tape data storage is typically used for offline, archival data storage. Tape media generally has a favourable unit cost.
+A tape drive is a '''storage device that reads and writes data on a magnetic tape'''. Magnetic tape data storage '''is typically used for offline''', archival data storage. Tape media generally has a favourable unit cost.
 ==RAID storage==
-RAID, Redundant Array Independent Disks is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for the purposes of data redundancy, performance improvement.
+'''RAID, Redundant Array Independent Disks is a data storage virtualization technology that combines multiple physical disk drive components into one''' or more logical units for the purposes of data redundancy, performance improvement.
 ==USB==
-The USB (Universal Serial Bus) is accessible to a host computing device and enables file transfers between the host and the USB device. To a host, the USB device acts as an external hard drive.
+The USB (Universal Serial Bus) '''is accessible to a host computing device and enables file transfers between the host and the USB device'''. To a host, the USB device acts as an external hard drive.
 ==Flash Memory Card==
-A flash memory card is a small storage device that uses nonvolatile semiconductor memory to store data on portable or remote computing devices.
+A flash memory card is '''a small storage device that uses nonvolatile semiconductor memory to store data on portable or remote computing devices'''.
 =Evolution=

@@ Line 20: / Line 20: @@
 =Evolution=
 =Prices in the market=
 The traditional hard disks have not stopped offering any more and better services since its journey began on the market, and nowadays the capacities and prices of these units have gone fitting up to coming at a level in which the cost for GB is almost ridiculous.

@@ Line 1: / Line 1: @@
 In computing, mass storage refers to the storage of large amounts of data in a machine-readable.
 =Types=
-==Virtual disks==
+Common types of mass storage include
-A method of expanding the program-addressable online storage of a single computer. The well-known counterpart of virtual disk, virtual memory operates on the basic mechanism of a page fault and provides an indefinately large address space for programs executing in a host computer.
+==Solid State Drive==
-A virtual disk is useful for a single computer whose existing disk space is becoming exhausted and where it is uneconomical to keep adding more and more disks. With special software, this device can be used to transparently extend the local online disk space.
+The Solid State Drive (SSD) is a type of data storage device that uses non-volatile memory to store data, instead of the magnetic disks or disks of conventional hard disk drives.
-==Network file server==
+=Evolution=
-A network file server supplies network users with large and cheap storage space. Some file servers use only magnetic disk; others use a storage hierarchy transparently managed by special software running on a control computer. The file server consists of fast-staging storage and large secondary, archive storage. Staging storage is online disk. It can be implemented through parallel disk arrays and software disk striping. Archive storage is usually implemented through tape.
-Network file servers can be attached to more than one network. There are four categories of file servers:
-PC LANs ( local area networks; one to several gigabytes),
+=Prices in the market=
-workstation LANs (tens of gigabytes),
+The traditional hard disks have not stopped offering any more and better services since its journey began on the market, and nowadays the capacities and prices of these units have gone fitting up to coming at a level in which the cost for GB is almost ridiculous.
-departmental minis or minisupers ( a few hundred gigabytes), and
-large mainframes or supercomputers ( one to tens of terabytes)
-In all cases, server is a shared network resource rather than being attached to one workstation or one computer because it provides cheap storage for many network users.
-==The file server==
-A file server is a repository in which data must be kept safely and indefinitely. For example, seismic data and earth observation data collection by satellites are generally kept in a file archive. The emphasis in a file archive is on low cost of storage and high reliability. The media used in a file archive must be stable over time, economical and reasonably fast.
-The archives are implemented by the traditional tape library. This system can in many cases be replaced by devices and software which form a more effective new storage system.
-==Automated network storage management==
+This way, a unit of 2 TB of Digital Western can be for 89,99 dollars in the United States, and that gives a cost for 0,043 dollars for GB. Or what is the same, scarcely 3 cents for GB, a number that makes clear the complex margins in which these units move.
-The strategy used in this case is similar to the file server. A network file server is a large and fast device because frequently accessed user files are cached on its fast disk. Infrequently used files are stored on tape. It has been shown that over 80% of the data in the system may be removed from expensive online storage without significantly sacrificing performance.
-==Network file backup==
+=Links to online shops (U.K and U.S)=
-The backup problem has become particularly acute with the growing use of networked computing. With so many users on a network, it is impractical to require each one to be responsible for the backup of his data. Network-wide backup is considered a mass storage application simply because networks have so many users and the amount of data to backup is so large.
-The use of common network resources, such as a computer server, a file server, suggests a common network-wide backup server.
+=4 questions=
 =Evolution=