We do have some 9x7 still under contract.. don't ask why.  Over the past two years we have had to replace two or three of the batteries on the back plane, if this is the one you speak of.



We actually purchased a few extras as it seem the same error when it failed would come up on the machines.  You have to solder them however...









Ryan C. Melander, V.P.

Ideal Computer Services, Inc.

6111 Southfront Rd., Suite J

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Ph. 925-447-4747 x213

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-----Original Message-----

From: HP-3000 Systems Discussion <[log in to unmask]> On Behalf Of Stan Sieler

Sent: Friday, November 20, 2020 3:06 PM

To: [log in to unmask]

Subject: Re: [HP3000-L] [EXT]: HP3000 / 918LX - Tape drive does not recognize inserted tape.



Re:



> I may have given some bad information.  Stan pointed out to me that the

> 9x7's have a built in battery for short term power failures.   I do know we

> got the 9x7's first, then upgraded to the 928's very shortly thereafter.

> It would be interesting if someone did the test today, would the 

> battery even work?  Assuming it hasn't been replaced.

>

>

I'd be very very surprised if an original battery in a 9x7 still worked!



I'd also be mildly surprised (and disappointed) to find that anyone is still using a 9x7 today ...

instead of something newer.  (Newer machines are incredibly inexpensive, and provide a lot better performance than most 9x8s, well ... at least for single processor models :)



The low-end 9x8s (918, 928, at least) had a hole inside for a battery backup ... but there is no connector (thus, no way to make a battery useful).  I suspect that during the R&D phase they hoped to have internal battery backup, but the power draw of the newer 9x8 (vs.

the 9x7) was simply too great

(*or* the division selling the new HP UPS had something to say about allowing customers to not need their product? :)



Stan



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