1.702: How do I make a filesystem larger than 2Gb?

AIX 3.2.5 and preceeding versions are limited to 2 Gigabytes per
filesystem.

With AIX 4.1 IBM allows filesystems up to 64Gb (reference:
Individual files are still limited to 2Gb.  AIX 4.2 allows 128Gb
filesystems and 64 Gb files.  (See also question 1.706.)

If you are having trouble creating a file greater than 1Mb it maybe
because that is the default limit for your account, see 'smit users'
or /etc/security/limit.