jfs2 -> jfs ?

[JurgyMan]

We are currently running on 64-bit hardware with 64bit kernel and jfs2.

Due to requirement of HA-CMP ES on 64bit kernel, we are reverting to 32-bit kernel (to run regular HA-CMP).

Will this severly impact the OS running 32-bit kernel with jfs2 filesystems?

What is the procedure to convert back to jfs filesystems?

thanks for your suggestions...

JurgyMan

[Gary R. Hook]

JurgyMan wrote:

> Will this severly impact the OS running 32-bit kernel with jfs2 filesystems?

No, not at all.

> What is the procedure to convert back to jfs filesystems?

Completely reinstalling and forcing the filesystems to be JFS.
There's no "conversion" mechanism.

In short, switch kernels and stop worrying about it. You
don't have a problem that needs solving.

--
Gary R. Hook / AIX PartnerWorld for Developers / These opinions are MINE
__________________________________________________ ______________________

[Jan-Frode Myklebust]

In article <20030908102440.48987408.JurgyMan@yahoo.com>, JurgyMan wrote:

>
> We are currently running on 64-bit hardware with 64bit kernel and jfs2.

We recently upgraded to 64bit kernel and JFS2, but had to revert back
to JFS for stability...

>
> Will this severly impact the OS running 32-bit kernel with jfs2 filesystems?

I would be carefull running JFS2 on 32-bit kernel. We've seen filesystem
corruptions, and AIX hangs caused by JFS2. At one point I was able to
reliably destroy most fileystems (metadata changes were registered, but data
updates never hit disk so thousands of files had size=0 after boot) because of
hangs related to JFS2 by stressing my systems with bonnie++.

IBM then told us to stick to JFS on 32 bit kernel.

> What is the procedure to convert back to jfs filesystems?
>

Dump / restore, where possible.


-jf