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From: radford@calgary.UUCP (Radford Neal)
Newsgroups: comp.sys.mac
Subject: Re: The never ending penny (or, Tales From the Darkside)
Message-ID: <744@vaxb.calgary.UUCP>
Date: Wed, 7-Jan-87 12:54:56 EST
Article-I.D.: vaxb.744
Posted: Wed Jan  7 12:54:56 1987
Date-Received: Thu, 8-Jan-87 22:02:02 EST
References: <7377@decwrl.DEC.COM>
Organization: U. of Calgary, Calgary, Ab.
Lines: 45

In article <7377@decwrl.DEC.COM>, bates@ssdevo.dec.com (Ken Bates	DTN 522-2039) writes:

> I've been having a problem lately in that the the total of the blocks in use 
> and blocks free as shown by the Finder seem to be increasing...
> 
> The configuration is a 512E with a Hyperdrive 20 with one HFS drawer. The
> Hyperdrive software is V3R1, and the System/Finder are the latest...
>
> Doing a ~10MB restore once a week is really getting old!

I hava a 10MB Hyperdrive and the latest software as above. I haven't
experienced this particular problem, but did encounter another one:

      After fiddling around with a number drawers (creating, optimizing,
      using both MFS and HFS, too many things to replicate), I found
      that:

          A) I had a HFS drawer with only 200K of data that the 
             disk optimizer (HyperTools) refused to collapse to
             one 256K disk block.

          B) Two particular files in the drawer were "linked" - changing
             one changed the other, sometimes at least.

      Problem B went away if I disabled the Hyperdrive RAM cache.

      I copied the data to a different drawer and destroyed the original.
      I also disabled the Apple disk cache. I've had no problems since.

I've no idea if this is related to your problems. I would suggest you
try the following, however:

      1) Make your startup drawer a MFS volume. This is what I have.

      2) Disable the Apple disk cache from the control panel. The
         Hyperdrive documentation suggests this in some obscure corner
         of the manual. They say the Apple cache is not write-through,
         which is indeed a bit on the dangerous side for my tastes.

      3) Disable the Hyperdrive RAM cache if things still don't work. 
         This is in the Manager under "Preferences", I think.

Good luck.

    Radford Neal