Hey!  I picked this up on CompuServe's HPSYSTEMS forum:

>Subj:  TurboStore error/5.5            Section: MPE systems
>  To:  Harlan Lassiter, 72350,2735     Thursday, February 13, 1997 12:11:27 PM
>From:  Harlan Lassiter, 72350,2735     #165828
>
>I may have an answer to my own question and it might be useful to someone else.
>
>HP responded to me and acknowlegded that there is a proble with the Store
>(or TurboStore) program that causes it to fail on multiple tapes when using
>new (never written on) tapes.
>
>The SR number I was given is 17653193722.  And the patch (NOT YET AVAILABLE),
>when available, was given to me as HPEGX5.
>
>The workaround is to write something on virgin tapes BEFORE using them in
>a multi-tape backup set.
>
>Hope this helps.

Jim Phillips                            Manager of Information Systems
E-Mail: [log in to unmask]      Therm-O-Link, Inc.
Phone: (330) 527-2124                   P. O. Box 285
  Fax: (330) 527-2123                   Garrettsville, Ohio  44231