Changing JFS FS size

[Iago77]

Hello again.

Today I've just tried to reduce the size of a jfs filesystem under AIX 5.3. I reveived this error:

chfs: Cannot reduce size of file system

Nevertheless you could perfectly extend its size.

I was in a hurry so I erased the filesystem, made another one with JFS2 type and the wished size.

So was it possible to reduce the size of a JFS filesystem?

I'm looking forward to your opinions.

Many thanks in advance...

 

[KenCunningham]

So you basically recreated the filesystem? I wouldn't say this is the same as the desired aim of 'reducing' the size of an existing filesystem though.

I don't mind people who aren't what they seem. I just wish they'd make their mind up.

 

[mrn]

No you can only reduce a jfs2 filesystem, the method to reduce jfs is backup/restore.

There is however a tool from compunix that will reduce a jfs filesystem but it costs...

Mike

"Whenever I dwell for any length of time on my own shortcomings, they gradually begin to seem mild, harmless, rather engaging little things, not at all like the staring defects in other people's characters."

 

[KenCunningham]

Sorry - meant to add ....though it has the same effect.

I don't mind people who aren't what they seem. I just wish they'd make their mind up.

 

[Iago77]

So I am going to take into account from now on!

Thanks

 

[p5wizard]

And AFAIK the compunix tool also requires a short unavailable time (unmount/mount) for JFS shrink operation.


HTH,

p5wizard