On Mon, 27 Jun 2005, Richard Sims might have said:

> A big FYI for AIX 5.x sites...
>
> I spent most of the weekend pursuing a problem in our TSM system
> where HSM operations could not proceed. The whole AIX 5.2 system got
> so screwed up in the kernel that 'ls -lR /opt' and 'ls -lR /usr'
> would hang, and nfsd was accumulating hundreds of unserviceable
> threads. After some reboots I was able to isolate the problem to a
> "seed" area: directory /etc/adsm/SpaceMan/candidatesPool/, where an
> 'ls -l' on it would hang (loop, actually), which 'truss' showed to be
> in a statx(). There were no errors in the AIX Error Log, the console,
> or anywhere else. At Init 1, we rebuilt the directory and HSM could
> proceed.
>
> Today, finally, AIX evidenced errors in the Error Log:
> JFS_META_CORRUPTION  and  JFS_FSCK_REQUIRED (on /). This finally gave
> me a solid keyword.  That led me to APAR IY66404 for AIX 5.2, which
> is quite new. (It has siblings for AIX 5.1 and 5.3.) Make sure you
> have this applied to avoid this very nasty scenario resulting from an
> AIX I/O serialization defect. You could end up with some unpleasant
> data loss without the HIPER APAR.
>
>    Richard Sims
>

Is this patch specific to any AIX platform or all AIX 5.2 in general?

Mike