Write file >2G on AIX

To write file over 2G on AIX, you should check the following settings:

1. Check /etc/security/limits and /etc/security/olimits. Make sure fsize is -1
2. Issue an "lsfs -q" command, check if "bf" is enabled

Name            Nodename   Mount Pt               VFS   Size    Options    Auto Accounting

/dev/hd4        --         /                      jfs   786432  --         yes  no  

(lv size: 786432, fs size: 786432, frag size: 4096, nbpi: 2048, compress: no, bf: false, ag size: 8)