An interesting question, that has a spectrum of answers. The speed at which data can be retrieved from a hard disk drive depends on the speed at which the disk itself passes below the head, hence servers have disks that spin at 10,000 or 15,000 rpm. Home computers have slower disks because they're cheaper and laptops typically have disks that are slower still, typically 5400 rpm because the power drain increases with speed as a result of frictional losses. Although it's a critical factor in the perfromance of a hard drive, manufacturers seldom give sensible figures for *sustained* read and write speeds. Instead, they often state the *maximum* speed, however, this is unrelated to data transfer between the physical platter and the read/write head. All disk drives have a limited amount of buffer memory. The *maximum* speed is the rate at which data are transferred in & out of that memory, which is usually limited by the interface. As a result, a maximum speed of 1 Gbyte per second might be listed in a specification, but the *sustained* speed might be more like 50 or 60 Mbytes per second, which sounds much less impressive. It's still a lot more than flash drives though - don't fall for the idea that a solid state laptop will be faster than one with a spinning disk, it won't, at least not yet.
access time is the amount of time required to deliver item from memory to processor. While, transfer rate is the speed with which data, instruction, and information transfer to and from a device. Transfer rate for storage are stated in KBs, MBps and GBps..etc
A hard drive that is Ultra ATA 100 has a burst transfer rate of 100MB per second, in one burst, not all the time. Therefore a burst rate is a one time transfer rate of speed or one session, which is similar to a cable provider claiming 20 megabytes per second, download speeds, when the actual sustainaible rate, is far less.
How quickly a drive can locate the correct track and sector once a data request has been made
E sata transfers at a rate of 300 megabytes per second and tapes transfer at a rate of up to 80 megabytes per second. E sata is by far the faster solution
It depends on the PATA drive in question. That said, the fastest UDMA interface when used with an 80-wire cable is 133 MB/s. From there, the maximum transfer rate for a SATA generation 1 drive is 150 MB/s. For SATA 2, it is 300 MB/s. For SATA 3, it is 600 MB/s.
no you do not
The main difference is transfer speed, if you for instance a new solid state drive it a sat 1 port it will be limited in speed, still fast but not the maximum performance you could get out of it, For a conventional Hard drive you won't notice the difference though. All sata devices are backward compatible so theres no worries there
Yes, temperature difference does affect heat transfer rate. The greater the temperature difference between two objects, the faster heat will transfer between them. This is described by Newton's Law of Cooling, where the rate of heat transfer is directly proportional to the temperature difference.
cpu
15 MBps to 320 MBps
7800 kB/s
A good data transfer rate for a PCI expansion card is between 200 and 400mbps.