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Conference hydra::amiga_v1

Title:AMIGA NOTES
Notice:Join us in the *NEW* conference - HYDRA::AMIGA_V2
Moderator:HYDRA::MOORE
Created:Sat Apr 26 1986
Last Modified:Wed Feb 05 1992
Last Successful Update:Fri Jun 06 1997
Number of topics:5378
Total number of notes:38326

1748.0. "Logical Floppy" by KBOMFG::HAUCK () Thu Oct 06 1988 06:16

Hi Freaks,

There is an easy way to partionize your Floppy (not only your harddisk!)
You must add the following to your Mountlist, if you have one external drive.

DF2:        Device = trackdisk.device
	    Unit   = 1
	    Flags  = 1
	    Surfaces = 2
	    BlocksPerTrack = 11
	    Reserved = 2
	PreAlloc = 11
	    Interleave = 0
	    Lowcyl = 0  ;  HighCyl = 39
	    Buffers = 20
	    BufMemType = 3
#

DF3:	    Device = trackdisk.device
	    Unit   = 1
	    Flags  = 1
 	    Surfaces = 2
 	    BlocksPerTrack = 11
	    Reserved = 2
	PreAlloc = 11
	    Interleave = 0
	    Lowcyl = 40  ;  Highcyl = 79
	    Buffers = 20
	    BufMemType = 3
#

After this you must Mount your 'drives' with 'MOUNT df2:' and 'MOUNT df3:'.
Now you can format each partion.

Result: You have two logical drives on you external Floppy with 440 Kb each
        partion.





From another mad AMIGA-Freak,

	Jochen.
T.RTitleUserPersonal
Name		DateLines
1748.1Yes, but why?AYOV10::ATHOMSONC'mon, git aff! /The Kelty ClippieThu Oct 06 1988 08:4911
�There is an easy way to partionize your Floppy (not only your harddisk!)
�You must add the following to your Mountlist, if you have one external drive.

    I'm not being sarcastic here, I've thought and thought, and I can't
    think of any reason why anyone would want to do this. Doesn't it
    mean that an ordinary drive (df0: for example) wouldn't be able to
    read a disk formatted in this way ? And doesn't it mean that your
    external drive would not then read ordinary (880K) disks ? (without
    re-booting that is).
    
    			Puzzled, Scotland.
1748.2why??...why not.MVCAD3::BAEDERD. Scott DTN 237-2961 SHR1-3/E19Thu Oct 06 1988 14:493
    I agrre...WHY??, but I think that if you use df1: to access the
    external drive, it's as norman...df2/3 wuold be the "funky" floppy.
1748.3BAGELS::BRANNONDave BrannonThu Oct 06 1988 18:356
    re: why?
    
    maybe it will allow you to diskcopy from a 40 track 5.25" disk to
    3.5" media (backup two 5.25" disks on one 3.5" disk)
    
    -dave
1748.4It does work.AYOV10::ATHOMSONC'mon, git aff! /The Kelty ClippieFri Oct 07 1988 04:2516
    
�    maybe it will allow you to diskcopy from a 40 track 5.25" disk to
�    3.5" media (backup two 5.25" disks on one 3.5" disk)
    
    Ahh ! good one, I didn't think of that !!
    
    Anyway I tried it last night and it works well, except that the
    INFO and CD commands get a little confused between df1: and df2:,
    df3: seems ok.
    What happens is that df1: gets the volume name of the disk/partition
    df2:, then even if you change the disk to a regular one and address
    it via df1: it keeps the same name. I didn't try it but I felt that
    if I had tried to write to a regular disk in df1: it would have
    been trashed.
    
    				Alan T.
1748.5Maybe not so useful after all...TLE::RMEYERSRandy MeyersFri Oct 07 1988 18:1213
Re: .3

For DiskCopy to copy a disk to another, both disks must be of the same
size and same type.  I suspect that would prevent DiskCopy from 5.25 inch
disks to a 3.5 inch partition.


Re: .4

>I didn't try it but I felt that if I had tried to write to a regular
>disk in df1: it would have been trashed.

I would have been.
1748.6disk-errorKBOMFG::HAUCKFri Oct 21 1988 07:295
    
    Another use for this disk-splitting:
    
    If you have a disk with a hard-error the you can use the other part
    of the disk.