Number of reads per BLDINDEX control card

Q:

How many times is the input VSAM file read if you have multiple BLDINDEX statements for the same VSAM cluster in one step?

A:

Kwik-Key builds up to 9 AIX files while reading the VSAM base cluster only once per BLDINDEX statement. 
If there are multiple BLDINDEX statements, the VSAM file is read again.