OOPS: Re: [Coco] large HD in OS9/68K

[Bob Devries]

Sorry, avid, I was wrong. I just now checked my drive's dmode, and it's this
way:

drv=00 stp=03 typ=27 dns=03 cyl=0050 sid=02 vfy=00 sct=0020 tos=0020
ilv=02 sas=08 tfm=00 toffs=00 soffs=00 ssize=0100 cntl=0000 trys=00
lun=00 wpc=0000 rwr=0000 park=0000 lsnoffs=00000000

Regards, Bob Devries; Ipswich, Queensland, Australia

----- Original Message ----- 
From: "David" <dbree at duo-county.com>
To: <coco at maltedmedia.com>
Sent: Wednesday, November 12, 2003 10:14 PM
Subject: Re: [Coco] large HD in OS9/68K


> On Wed, Nov 12, 2003 at 01:19:33PM +1000, Bob Devries wrote:
> > David asked:
> > > It looks, assuming 512-byte sectors, that it's writing one track
> > > and quitting.  What does free show?
> >
> > Free shows the correct free space on the drive.
> >
> > > From what I understand, cyls, spt, and sides is irrelevant, although
> > > it's my suspicion that sectors x sides x sect-size probably must not
> > > exceed the capacity of one track if the driver does not use lba mode,
> > > and mine doesn't AFAICT.
> >
> > If you reset bit 3 of the PD_Ctrl, then the drive isn't interrogated for
> > size, but the settings in the descriptor are used.
> > AFAIK, all SCSI drives use LBA.
>
> Ahhh..  I had assumed you were using an IDE drive.
>
> Last night, I was looking over the docs that came with my Disto system -
> it came already set up.  Again, these are IDE.. It stated that the SPT
> _must_ be 17, and a max of 16 heads.  I've disassembled the driver and
> it checks these values in the drive table when it accesses the drive.  I
> wonder if this might just be outdated documentation or if there's
> something in RBF or my driver (or the formatting program that it uses).
> I need to ask someone who deals with this, I guess.
>
> While we're on the subject of drives..  What are the params for your
> floppy drives on the MM/1?  The reason I ask - I sent this q to
> comp.os.os9, but never saw the message - looked on google for it, too -
> but mine are 34 (I believe) SPT, but the big rub is that the sector
> count starts at 0 .  I got the idea one day to use the fdutils in Linux
> and make .dsk images of all my floppies and store them on CD.  Then, if
> a floppy went bad, I could recreate it.
>
> But!  linux does not support sector-0 floppies.  There is a patch from
> the fdutils site that supposedly adds support for this - you have to
> compile it into your kernel.  I did this but still it wouldn't work.  I
> get the impression that you might have to do a raw low-level-command
> read/write even with this.  Kinda "iffy" to me.
>
> I don't know why my system was set with this sector format.  I wonder if
> I couldn't make a descriptor with begin sect of 1, and then copy to
> floppies that had this format and then simply use that format in the
> future.
>
> Another option, I suppose, would be to use some other standard format -
> maybe the "universal" format for these setup disks?
>
> > Regards, Bob Devries; Ipswich, Queensland, Australia
> >
> >
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> >
>
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