【 Weak current College 】 hard disk external data transfer rate

Hard disk data transfer rate of English spelling as DataTransferRate, hereinafter referred to as DTR. Hard disk data transfer rate when you show the hard work, the data transfer speed is hard drive work performance of specific performance, it is not static but as the work of the specific circumstances change. In reading the hard drives of different tracks, different sectors of the data; the data stored is continuous and other factors will affect the hard disk data transfer rate. Because the data uncertainty, so manufacturers indicate hard disk parameter, the more is the use of external data transfer rate (ExternalTransferRate) and internal data transfer rate (InternalTransferRate).

External data transfer rate (ExternalTransferRate), also known as burst data transfer or interface transfer rates. Refers to the hard disk cache and computer systems, the data rate, which is the computer hard drive interface from the cache and the data to be read out to the appropriate controller. The usual hard drive used by the ATA66, ATA100, ATA133, interface, which is the hard drive of the theoretical maximum external data transfer rate. 100 's of ATA100 represents this external hard disk data transfer rate was the theoretical maximum 100MB/s; ATA133 represents external data transfer rate was the theoretical maximum 133MB/s; SATA1.0 interface hard disk external maximum theoretical data rate up to 150MB/s, while the SATAII interface hard disk external maximum theoretical data rate up to 300MB/s. These are just hard drive theory's largest external data transfer rate, in actual everyday work is unable to achieve this value, but is more dependent on internal data transfer rate.