The disk heats up more quickly at higher rotation speeds. Cooling a 7,200 rpm disk with a fan will prolong its life. The number of milliseconds required for the head to wait for a sector once it has been positioned over the desired track is referred to as rotational latency. Average rotational latency time is approximately 4 to 6 milliseconds. Normally, the hard disk cache performs reading and writing.
Caches vary in size and organization .
It may be necessary to enable the write cache function on SCSI hard disks. Method of organizing data. The values are calculated into a logical block address, which is then translated into the actual head, cylinder and sector values. Today's BIOS use the logical block address, thus eliminating such restrictions as the 504 MB barrier. There are three methods of storing data on the hard disk.