Methods to save i5/OS optional libraries (QHLPSYS, QUSRTOOL)

Table 1. i5/OS™ optional libraries (QHLPSYS, QUSRTOOL) information
Item description	When changes occur	Contains user data or changes?	IBM-supplied data?
i5/OS optional libraries (QHLPSYS, QUSRTOOL)	i5/OS optional libraries (QHLPSYS, QUSRTOOL) change when you apply Program Temporary Fixes (PTFs) or when you install new releases of the operating system.	No¹	Yes

Common save method	Requires restricted state?
SAVLIB*NONSYS	Yes
SAVLIB *IBM	No², ³
SAVLIB library-name	No³
GO SAVE command, menu option 21	Yes
GO SAVE command, menu option 22	Yes

¹: You should avoid changing objects or storing user data in these IBM-supplied libraries or folders. You could lose or destroy these changes when you install a new release of the operating system. If you make changes to objects in these libraries, note them carefully in a log for future reference.
²: You do not need to put your server into a restricted state, but it is recommended.
³: Important: For procedures where the server does not require a restricted state, you must ensure that the server can get the locks necessary to save the information. You should place your server in a restricted state whenever you save multiple libraries, documents, or directories, unless you use the save-while-active function.

Save libraries with the SAVLIB command explains how to save one or more libraries. This information also includes special SAVLIB parameters and how to select libraries on your server.