Just yesterday, I tried writing to a 60 meter tape with a DDS-2 drive and
got the same 'no write ring' message and was puzzled too.  Mike Hornsby
happened to be nearby and he told me that the tape did not have a 'media
recognition symbol' on it.  He showed me a tape drive unit sitting on a
shelf that had on its underside a dip switch bank.  He said that one of the
switches on the tape drive unit (#3?) controls whether or not the tape drive
only recognizes tapes with MRS or ignores MRS completely.  So, it appears
that the tape drive I was using had the setting set to 'ignore non MRS
tapes'.

I got out a scratch tape that had the 'media recognition symbol' on it and
used it instead.

HTH,

John Backus
Beechglen Development, Inc.

> We have a C1537A DDS-3 drive that was installed last year.  Prior to that,
we
> had a DDS-1 drive that came stock with our 927LX.  This morning I tried to
> :STORE to an old HP-cut SUBSYS tape, which is a 60 meter DDS tape.  It was
> write-enabled via the little white slider, but when the :STORE got
underway,
> the message:
>
> 10:41/18/LDEV#7 WRITE NOT ENABLED
>
> appeared on the console.  Does anyone know of any limitations
(undocumented)
> with the C1537A and 60 meter DDS-1 DATs, especially with tapes previously
cut
> by HP?  (this particular tape was SUBSYS for MPE/iX 4.0).  We tried
another 60
> meter DDS-1 with the same results.

> Steve Patterson                         [log in to unmask]
> Halifax Port Authority                www.portofhalifax.ca
> Halifax, Nova Scotia