Considerations for Using ICQSPC00

ISPF must be active to support the space management information panels.
RACF® accounting data is lost when ICQSPC00 reallocates a data set.
If a data set is RACF protected by a discrete profile, but its profile has been deleted, ICQSPC00 cannot copy the protection to the new data set.
If RACF is not installed, space management cannot copy the RACF universal access (UACC) from the old data set profile to the new data set profile. Instead, space management gives the new data set the default UACC, which might not match that of the old data set. For any release of RACF, however, space management copies the RACF access list from the old profile to the new profile.
When a user enlarges a RACF-protected data set that has a high-level qualifier not equal to the user's user ID, the user needs the authority to create a RACF profile for the temporary data set used during reallocation.
If the old data set is password-protected, and password-protected data sets are allowed, the data set is no longer password-protected if space management must reallocate the data set. (Whether password-protected data sets are allowed is specified when space management is invoked).
Space management can only ensure that the data set has a specified percentage or amount of space free. If, after invoking ICQSPC00, an application or user adds more data to the data set than there is room for, the addition fails. However, an application could invoke ICQSPC00 to recover from the shortage.