闪存存储vs Hard Drive
硬盘驱动器和闪存驱动器是现代计算机中使用的两个存储机制。硬盘驱动器(较旧的设备)仍然是计算机用户中的最爱,而闪存驱动器作为便携式数据驱动器突出。固态驱动器也是闪存存储驱动器,用作具有特殊要求的计算机中的关键辅助存储。
硬盘和硬盘
硬盘驱动器(HDD)是用于在计算机中存储和检索数字信息的辅助数据存储设备。Hard Disk Drive由IBM在1956年推出,到1960年代初成为通用计算机的主要二级存储设备,仍然是存储的主要形式。自引入以来,该技术已大大改进。
The hard drives are prominent due to their capacity and performance. The capacity of the HDD`s vary from one drive to another, but has been consistently increasing over time. Early hard disk drives had very low capacities, but modern personal computers have hard disk drives with capacities in terabytes. The computers used for specific tasks such as data centers have much higher capacity hard drives.
硬盘驱动器是一种机电设备;因此,磁盘驱动器内部有活动部件。硬盘本身是硬盘驱动器的主要组成部分之一。
A hard disk drive consists of following components.
1.逻辑板 - HDD的控制器电路板,它与处理器通信并控制HDD驱动器的相关组件。
2. Actuator, Voice coil, and Motor Assembly – control and drive the arm holding the sensors that are used to write and read the information.
3.执行器臂 - 长而三角形的金属零件,底座连接到执行器上,是支持读写头的主要结构。
4.滑块 - 固定在执行器臂的尖端上;横穿磁盘上的读写头。
5. Read/Write Heads – write and read the information from the magnetic disks.
6.主轴和主轴电机 - 磁盘的中央组件和驱动磁盘的电动机
7.硬盘 - 下面讨论
The performance of a hard drive is characterized by the Access Time, Rotational Delay, and Transfer Speed. Access time is the time taken to initiate the actuator by the controller to move the actuator arm with the read/write heads into position over the proper track. Rotational delay is the time the read/write heads must wait before the intended sector/cluster rotates into position. Transfer speed is the data buffer and transfer rate from the hard drive.
硬盘驱动器使用不同的接口连接到主板。增强的集成驱动器电子(EIDE),小型计算机系统接口(SCSI),串行连接的SCSI(SAS),IEEE 1394 FireWire和光纤通道是现代计算机系统中使用的主要接口。大多数PC都使用增强的集成驱动电子(EIDE),其中包括流行的串行ATA(SATA)和并行ATA(PATA)接口。
自Hard Disc Drives are mechanical devices with moving parts inside them, prolonged usage and time cause wear and tear, making the device unusable.
Flash Drive
Flash Drive是使用闪存构建的计算机存储设备。闪存是一种由EEPROM开发的非易失性内存技术。闪存驱动器是固态设备,因此比传统存储驱动器类型具有许多优势。
有许多使用闪存技术构建的内存设备。但是,USB闪存驱动器和固态驱动器是与硬盘驱动器功能相当的设备。USB闪存驱动器和SSD均基于半导体技术开发。
USB闪存驱动器基本上是可以通过USB连接器连接到计算机的闪存芯片。闪存驱动器是在1990年代中期开发的,并在十年末进入消费市场。这些设备是当时便携式介质(例如软盘,紧凑型鸡巴(CD)和DVD的更好的选择;因此,变得非常流行。
普通的闪存驱动器非常轻(约25克),尺寸很小,容量很高。这使得Flash驱动器成为可用的最佳便携式数据存储。
The other type is the SSD`s or Solid Stated Drives. They consist of a bank of flash chips and have very high capacity. They are used instead of the hard drive in computers where speed and lower weight is required. These drives are very light and very fast.
SSD的缺点是价格。与普通的HDD相比,SSD可能是千兆字节的成本几次。
闪存存储vs Hard Drive
• Hard drives are electromechanical devices, and moving parts are involved in the operation.
• Flash drives are solid state devices, and they are built of semiconductor material.
•硬盘驱动器的能源效率较小,嘈杂和缓慢,而闪存则是节能,无声和快速的。
• Hard drives are heavy due to their metal covering and components while flash memory devices are very light.
•硬盘驱动器的尺寸较大和笨重,但是闪存驱动器相对较小。(USB闪存驱动器很小; SSD也很小,但是根据制造商的需求,尺寸可能会有所不同;例如,要在计算机机箱内安装SSD覆盖实际上对设备要求过多的覆盖)
•与固态驱动器相比,硬盘驱动器相对便宜。USB闪存驱动器很便宜。
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