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From: d88-jwa@byse.nada.kth.se (Jon W{tte)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Getting more out of your Hard Drive
Message-ID: <1991Mar6.140018.5729@nada.kth.se>
Date: 6 Mar 91 14:00:18 GMT
References: <1991Mar5.052358.25059@bronze.ucs.indiana.edu> <1991Mar5.193358.8027@unx2.ucc.okstate.edu>
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 27

In article <> minich@unx2.ucc.okstate.edu (Robert Minich) writes:
>by sl242030@silver.ucs.indiana.edu (Robert P. Humphrey):

>| installing ONE partition, that you can get an extra Meg out of your
>| Hard Drive?

>Bzzzt. I think the real problem is just a dumb default. (LaserWriter 6.0

>* HD40        MacOS             96  40000  K  Apple_HFS           0
>Free Space    Extra          80096    966.5K  Apple_Free          3

>First, the block size on this drive is 512 bytes, so the 40,000K size
>for the HD40 (my disk name, BTW) is 40,1000/1024 = 39.06MB, not 40MB.

Notice the "block size". Files are allocated in blocks on the
disk, and I _think_ that the default value is chosen so that
the block size won't go over a limit, and double. Perhaps using
all the space on the drive means going up to 1K block size, and
that would mean a _lot_ more "wasted" space at the end of each 
file (since files always occupy whole blocks)

						h+@nada.kth.se
						Jon W{tte

"The IM-IV file manager chapter documents zillions of calls, all of which
seem to do almost the same thing and none of which seem to do what I want
them to do."  --  Juri Munkki in comp.sys.mac.programmer