In a virtual storage system, a fixed-length block of contiguous virtual addresses copied as a unit from memory to disk and back during paging operations.

在虚拟存储系统中，一个固定长度的连续虚拟地址块，在分页操作过程中它作为一个单位在内存和磁盘之间来回复制。

Example: The length of a fixed-length variable is static.

例如定长变量的长度是静态的。

Example: The length of a fixed - length variable is static.

例如定长变量的长度是静态的.

VSAM is used for direct or sequential processing of fixed - length and variable - length records on DASD.

VSAM用来对DASD上定长或变长的记录进行直接或顺序的处理.