Indexes:
On 3390, a track will hold 33 of 1K blocks -- do not
specify less than 33 as PRI or SEC, cos you'll get that anyway.
Data spaces:
On 3390, a track will hold 12 of 4K blocks -- do not
specify less than 48 as PRI or SEC, cos you'll get that anyway.
INTEGER can be up to 2.1 giga-number.