The software product SIR (System Install and Restore) is used to install a pubset during system installation or in ongoing operation.
In addition, SIR offers facilities for initializing disks (VOLIN utility routine).
In general, each SIR version is linked to a particular BS2000 version. This means that a given version of SIR can only generate IPL disks and BS2000 systems of exactly the version it is linked to.
A version changeover is an exceptional case in this context: The SIR version linked to the desired new BS2000 version (target version) needs to run in the existing old BS2000 version (execution version).
SIR provides compatibility only backwards here, i.e. it must always be execution version <= target version. It is therefore recommended to keep a suitable home pubset or IPL disk, in case you might need to return to an earlier version in the future.
In BS2000 V21.0, a version changeover can be based on the execution versions BS2000/OSD-BC V10.0 or V11.0. The software package BS2OS.MIGRATE must be installed for doing so, which contains e.g. the appropriate version of SIR for creating IPL disks of BS2000 V21.0.
You should bear in mind that only device types belonging to the device spectrum of BS2000 (both in the execution version and in the target version) are supported.
For a detailed description of the SIR utility routine see the “Utility Routines” manual [1].