On 5/12/03 3:59 pm, in article
5349f6b1.0312050759.dab47b@posting.google.com, "Tom Brehony"
<tomb@lk.blackbird.ie> wrote:

> I have recently taken over responsibility for an RS6000 installed 6
> years ago, and while I have some AIX admin knowledge, I am not a
> trainrf admin. I ended up with this responsibility because I know more
> about AIX than any of the other people here. I'm sure many of you know
> what that is like.....

Your first mistake - or the person who built the box's first mistake was
having application and application data on rootvg. This is generally
considered a major no for the reasons you've just described.

The best way to configure an AIX box is to have two disks in the rootvg, one
mirrored onto the other and only containing the OS and default paging. All
application data can then go on other disks of your choice, whether they be
SCSI, SSA, Fibre, SAN etc

I don't know of any shareware that could do what you want but the only way I
can think of is based on how much space you have on the other disks. If you
have a free disk, you could mirror hdisk0 onto that disk but you'll need a
whole free disk and the OS logical volumes will also need to be on a single
disk i.e. Not spread across two disks. If all disks are used, then you are
screwed! Sorry for being blunt!

I would try to get an export of the Sybase database onto files, back them up
then you'll have to do a reinstall of the OS (you could do a mksysb but the
sybase raw lv's will be missing as a mksysb only backs up mounted
filesystems), then create the new raw lv's and import the export back into
Sybase. I think you'll need to explain to your employers that the system is
heading for a major fall!