Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!sdd.hp.com!caen!dali.cs.montana.edu!milton!ogicse!unmvax!uokmax!d.cs.okstate.edu!unx2.ucc.okstate.edu!minich From: minich@unx2.ucc.okstate.edu (Robert Minich) Newsgroups: comp.sys.mac.hardware Subject: Re: Getting more out of your Hard Drive Message-ID: <1991Mar5.193358.8027@unx2.ucc.okstate.edu> Date: 5 Mar 91 19:33:58 GMT References: <1991Mar5.052358.25059@bronze.ucs.indiana.edu> Organization: Oklahoma State University Computer Center Lines: 54 by sl242030@silver.ucs.indiana.edu (Robert P. Humphrey): | | Did you know that, if you use the Hard Drive installer that | comes wth the Macintosh System Software, and after formatting, | installing ONE partition, that you can get an extra Meg out of your | Hard Drive? | Where did all that extra space come from? Answer: | A/UX Bzzzt. I think the real problem is just a dumb default. (LaserWriter 6.0 users can sympathize.) If you crank up "HD SC Setup" and click on the partition button, you'll get a nice little display that shows how the space on your disk is used (assuming it was formatted with the Apple software, of course.) The following figures are from my disk, a Qunatum 40MB drive that shipped inside my SE/30 and was formatted upon arrival (it was shipped unformatted) by HD SC Setup with the "initialize" button, ie the default partition map. Title Name Firs Block Size Type Partition Num ----- ---- ---------- ---- ---- ------------- Partition Map Apple 1 35.5K Apple_Partition_Map 1 * Mac Driver Macintosh 64 16 K Apple_Driver 2 * 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. Also note that "Free Space" partition, number 3. There's another 960K to be had on that darn disk! Well, here's what I should have done if I knew about this stuff when the Mac first came in: start up the Mac off of a disk other than the Apple one you want to "expand", crank up HD SC Setup, select that hard disk with the Drive button. Hit the partion button and resize the Mac partition to take all the grey colored space (by dragging the edge of the block in the picture.) I haven't done this yet but rest assured I will as soon as something happens to my hard disk, like a crash or (yikes) a backup. Yes, I'm too dumb (cheap?) to make that little effort. Self abuse. Anyhow, you'll probably be asked if you REALLY want to do this, as I assume it would probably trash the partition. So, you have to backup first or be prepared to reinstall everything, which won't be hard if all you need is the installer disks from Apple... The Bzzt at the top was just to say that this "extra" disk space isn't reserved for A/UX (it's way to small for that!). I suspect but cannot prove that is is the result of using drives from different manufacturers. Instead of figuring out how many blocks it could snarf, HD SC Setup probably assumes 40,000 bytes is fine and divies the rest up as needed for the partition map, the driver, the the "extra" space. I'd like to see how much space is wasted on various Apple labeled HDs in other people's Macs, like the 80 and 160MB ones. Any volunteers? -- |_ /| | Robert Minich | |\'o.O' | Oklahoma State University| "I'm not discouraging others from using |=(___)= | minich@d.cs.okstate.edu | their power of the pen, but mine will | U | - "Ackphtth" | continue to do the crossword." M. Ho