| 摘要 |
A controller for and method of controlling the transfer of data between a host computer and a number of memory units (42), particularly magnetic disk drives is disclosed. A request for data by the host computer causes the central controller (22) to check the buffer (26) formed of buffer segments (28) to establish whether the requested data is contained therein. If so the data is supplied to the host computer. If the requested data is not present in the buffer (26) data is read from the memory units (42) and supplied to the host computer. In addition further data which is logically sequential to the requested data is stored in a buffer segment (28). The central controller (22) operates to control the size and number of the buffer segments (28). |
