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I just discovered, when I tried to add a new ESS volume to one of my
servers, that I have NO vpaths and no dpo device! I used to have a dpo
device and several vpaths. The server is running (seemingly) just fine,
but this obviously needs to be fixed. I hope someone can help me.

Here's what I know:

I was running AIX 4.3.3 with the SDD driver. Specifically, I had the
fileset ibmSdd_432.rte 1.3.1.3, if it matters.

I upgraded this server to AIX 5.2.0.4. I tried to very carefully follow
what documentation I could find on how to do this and make my ESS
volumes still work. (But I didn't do this carefully enough, clearly.)

It may not matter what exactly I did, but it was something like this:
Unmount, vary off, etc., the ESS stuff.
Install AIX 5.2.
Install the devices.sdd.52.rte 1.5.1.0 fileset.
Install the 1.5.1.3 update to this fileset.
Removed the ibmSdd_432.rte fileset. (I think this is where things went
in the crapper.)
Rebooted and found that all my ESS volumes were mounted, and I was
happy.
HOWEVER, I may not have had the vpaths right there, and didn't notice
it.

I also found that several files from the SDD fileset are missing:
lsvpcfg, lsvp, datapath, etc., and this is when I stumbled onto the
fact that I couldn't make another vpath. I do see /usr/sbin/sddsrv
running, however. I see error messages in my smit.log (that I missed
before) during the install of the sdd.rte fileset, such as:

sysck: 3001-036 WARNING: File
/usr/sbin/lsvpcfg
is also owned by fileset ibmSdd_432.rte.

And errors on the Sdd.432 un-install, such as:

ln: /usr/bin//datapath exists. Specify -f to remove.

Yes, I should have noticed these long before now.

So, can someone please tell me:

Is this a serious problem that may kill me in the next day or two?
Surely not.

How do I repair whatever fileset damage is wrong? (Maybe something
like: vary off everything, and then remove and reinstall the
devices.sdd.52.rte fileset?)

How do I get my vpaths and dpo back again?

id think you forget to run hd2vp after you've been messing with
re-installing sdd filesets...