What do you do if you have updated it as mistaking a member of an important library ?
- Do you reconstruct as serving limits of a memory ?
- Do you make an excuse that it doesn't do ?
- Will it be resigned, or ?
REVIVE! is a tool so as completely to recover a member of such a partition data set (PDS).

Structure of a partition data set is very simple. In case that it update a member, new data are write in for the last tail at all times and don't write a former member. A past member becomes an dead area not pointed at with a directory. Get as being with not re-use until it does COMPRESS in this dead area. REVIVE! searches this dead area, make a member revive by making an entry again for a directory.