Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!xanth!nic.MR.NET!umn-d-ub!rutgers!att!alberta!ubc-cs!van-bc!lpami
From: lphillips@lpami.wimsey.bc.ca (Larry Phillips)
Newsgroups: comp.sys.amiga
Subject: Re: Bridgeboard
Message-ID: <2191@van-bc.UUCP>
Date: 29 Jan 89 22:07:56 GMT
Sender: lpami@van-bc.UUCP
Lines: 81

In <5784@cbmvax.UUCP>, bill@cbmvax.UUCP (Bill Koester CATS) writes:
>>Also, I have another question.  Is it possible to use FFS a Bridgeboard
>>harddisk partition (ie: a HD on the IBM side)?  I've been told that it
>>can be done, is this true?
>
>	V2.0 of the Janus software ( also RSN ) will allow this.
>

In the latest Transactor for the Amiga (Vol 1, issue 5), Don Curtis (Amiga
Dispatches), gives a procedure for running an Amiga FFS partition on a Janus
drive. Unfortunately, he took the word of someone on the net who detailed how
it could be done, and it doesn't work. He did some playing and found out how to
do it, and has written it up for TransAmi #6. He has kindly given me permission
to cross-post a message from Compuserve with the methodology, so here it is:

---------------------------------------------


#: 32034 S13/Tool Box
    25-Jan-89  00:55:35
Sb: #32003-Disk Sector Editor
Fm: Don Curtis/SYSOP 76703,4321
To: Andre Frech(CBM/ATL) 72077,3301

Andre,
        It'll be in my article for Transactor for the Amiga, issue #6, but
in a nutshell:

    1. partition via FDISK and ADISK as per normal
       if you don't already have a JANUS partition.

    2. If you do have a JANUS partition, backup the entire thing.

    3. Use DJMount and DPFormat and look at the start and ending
       cylinder numbers output by DPFormat...they're important.

    4. Once formatted, use a sector editor and change byte #4 of
       track 0, sector 0 from 00 to 01 (change fs type to DOS1).

    5. reboot...do NOT use DJMount any more

    6. Create a mountlist for FFS, for JH0: (first partition)
       Unit # will be 0, JH1: (second partition) will be Unit 1, etc.
       You can call the drive anything you want to...nothing magical
       about JH0: and so forth.

    7. Use the low and high cylinder numbers reported by DPFormat
       for LowCyl and HighCyl.  Device is jdisk.device, sectors, tracks,
       etc. to match your specific drive.

    8. Otherwise, normal FFS mountlist

    9. Now MOUNT the drive...it'll work fine under FFS

    The one exception...and the reason for the gyrations is that the
normal Format command will hang on the first cylinder no matter how the
drive is mounted...thus you have to play with the dos type indicator by
hand.

    It will now run significantly faster...as in 4 to 5 times as fast
and as is typical with FFS drives, will hold an extra 5% of data.

    Typical disclaimer...I figured this method out, tested it and it
worked fine for me...your mileage may vary.

                                Don

-------------------------------------

Hope this helps.

-larry

--
Frisbeetarianism: The belief that when you die, your soul goes up on
                  the roof and gets stuck.
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|   //   Larry Phillips                                                |
| \X/    lphillips@lpami.wimsey.bc.ca or uunet!van-bc!lpami!lphillips  |
|        COMPUSERVE: 76703,4322                                        |
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