If your looking into defining a user ASP, that is done in DST accessed during an IPL. I would advise against it though as it no longer has the benefits it once did.
ASP1 is the system defined ASP.
By using WRKSYSSTS or DSPSYSSTS you will see the System ASP and the current ASP used.
What do you mean by “what is the procedure to define our own”
Please be more specific.
This seems like a homework question
If you mean to have multiple ASPs, yes you can have them. You can have system files and user files on different ASPs, however, it is hard to manage multiple ASPs. WRKSYSSTS displays all ASPs you have in your system.
When you create a disk pool using the New Disk Pool wizard availabile through Operations Navigator disk management functions , specify Type of disk pool as Basic or Independent. When you create an independent disk pool, a specific set of attributes are defined:
A user-defined name that is unique among the independent ASPs in the cluster. This is the name of the physical resource.
A unique number between 33 and 99 that the server uses to identify the independent ASP. This is the ASP number assigned by the system.
One or more disk units
In addition, the system will set an attribute so that the ASP will not be able to overflow. The inability to overflow ensures that the independent ASP will always be independent. Allowing overflow into the system ASP would prevent independent vary configuration processing or switching between systems.
Independent ASPs support user-defined file systems (UDFS) in the form of directories and stream files. You cannot store library objects in an independent ASP. When you create the independent ASP the system directs a default UDFS called qdefault.udfs to the independent ASP by specifying the path name: /dev/independent ASP-name/qdefault.udfs. You can create additional UDFS later if you wish.
If you are asking about setting the ASP threshold %, log into SST, take option 3, w/w disk units, then option 2, w/w disk config, then option 3, w/w asp threshold. The help didn’t tell me the default %, but I’m pretty sure it is 90%.
Just in case that’s what you were asking.