Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!rice!sun-spots-request
From: ehrlich@psuvax1.cs.psu.edu (Dan Ehrlich)
Newsgroups: comp.sys.sun
Subject: Newfs under SunOS4.1 reports file system sizes incorrectly
Keywords: SunOS
Message-ID: <9702@brazos.Rice.edu>
Date: 5 Jul 90 17:06:08 GMT
Sender: root@rice.edu
Organization: Sun-Spots
Lines: 14
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 9, Issue 256, message 5

I just noticed that when running newfs the file system size that is
reported is about 105% of what it should be.  For example

# newfs /dev/rid000h
/dev/rid000h:   159900 sectors in 130 cylinders of 15 tracks, 82 sectors
        81.9MB in 9 cyl groups (16 c/g, 10.08MB/g, 4608 i/g)

Using my trusty TI-55-II calculator to compute (159900*512)/1048576 yields
a result of 78.076172MB.  Even worse 9g * 10.08MB/g = 90.72MB, not 81.9MB.
This is off by about 12%.  Can anyone explain to me why these values would
be so far from what it would appear they should be?

Thanks.
Dan Ehrlich <ehrlich@cs.psu.edu>/Voice: +1 814 863 1142/FAX: +1 814 865 3176