DB2 row compression features can decrease disk storage requirements while at the same time improve sequential read access of large queries which perform full table scans.
DB 2行压缩功能可以减少磁盘存储需求，同时改进执行全表扫描的大量查询的顺序读取访问。
A program references storage using the effective address computed by the processor when it executes a storage Access or Branch instruction or when it fetches the next sequential instruction.
在程序执行Storage Access或Branch指令或者在存取下一条顺序指令时，它将使用处理器计算出的有效地址引用存储设备。
Magnetic tape is sequential access storage and can solve the problem mentioned above.
磁带是顺序访问存储，能够解决上面所提问题。
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