This link is about the difference of JFS & JFS2
http://alangnet.ptez.org/myblog/inde...Id=31&blogId=1

Mike ´£¨ì:
> On 2005-08-27, Phil Langerholc <root@localhost.nospam> wrote:
>
>>Mike wrote:
>>
>>>I've installed a samba share on an aix box for the dba
>>>to test some backup stuff (doesn't have enough space
>>>on the intel box). I created the file as a JFS2, large
>>>file enabled, then also changed /etc/security/limits
>>>setting fsize=-1 for that user. Restarted samb and things
>>>look ok, however the file stops growing at 64GB. I know
>>>that's a limitation number, but with all I had done (above)
>>>I thought I was past this number. The file size is about
>>>111 GB.
>>>
>>>Oh, creating the filesystem I maxed out NBPI and the next
>>>setting (put both parameters to the highest value).
>>>
>>>Am I missing something or is the 64GB a real hard limit?
>>>
>>>Mike
>>
>>Hi Mike,
>> Are you sure this is jfs2? What does lsfs -q show you? There is no
>>"large file enablement" for jfs2 as all jfs2 filesystems are large file
>>enabled by default. Also with jfs2, the size of a file is limited to
>>the size of the filesystem. I believe jfs2 is 6TB. Also with jfs2 there
>>are no NBPI settings, only a block size (I doublechecked on my 5.1 and
>>5.2 servers just to be sure). To me it sounds like you still have a jfs
>>filesystem set up, which explains the 64GB file limitation.
>>
>>---Phil
>
>
> This is what I also found late last night. I rebuilt the filesystem
> and now everything is ok. Thanks for everyone's help!
>
> Mike