Melinda writes:
> Running an EXPORT NODE over the weekend, I received this error message:
>
>     ANR5364E Record sequence error on device 05A4.

I took a look at the code.  The message is displayed after a positioning
occurs on the tape.  The block number that the hardware found wasn't what
we expected to find.

After a quick look, I would have expected message ANR0674W to also be
displayed:
  ANR0674W EXPORT NODE: Retrieve or restore failed - error on input storage
             device.
And then it appears the export node operation should stop, but you mentioned
that it didn't. Did you also see the above message?  What PTF level are you
on now?

>  SYSTEM ACTION:  The server marks the volume in an I/O error condition.
>
>  USER RESPONSE:  This failure may be due to a hardware problem.  Reset
>  the error condition with the UPDATE VOLUME command.  If the problem
>  persists, use the DELETE VOLUME command with the DISCARD=NO option to
>  remove the volume from the storage pool.

I believe what really happens is that a read error is recorded for that
volume.  You can see this number via the QUERY VOLUME command with
FORMAT=DETAILED.  Only after a certain number of read errors, is the volume
set to unavailable.

The actions that you took, is what I would have done.  Audit the volume.  It
will go through the same I/O code that the Export does, but in your case, it
didn't hit this positioning problem this time.

Dave Crockett - ADSM Server development
Tucson, AZ - phone: (602) 799-2476
internet: crockett AT vnet.ibm DOT com