🚀 go-pugleaf

> > If I know the ID of SCSI device (more exactly: bus, ID, LUN) how I can
> > know has this device startup volume or not?

Sorry, it was (and still is) the question for programmers. I'm writing
disk formatting utility and, of course, won't format my startup disk.

Thanks,
Leo

In article <leo-2812952132070001@adinstruments.tmx.com.au>, leo@adi.com.au
(Leo Possajennikov) wrote:

> If I know the ID of SCSI device (more exactly: bus, ID, LUN) how I can
> know has this device startup volume or not?

Leo,

As far as I know, if it has a valid system file & neccessary system stuff,
it can be a boot (startup) volume.  The one selected in the "Startup Disk"
control panel is the current startup volume.


Simon

-- 
http://odyssey.apana.org.au

In article <simonjw-0301960838220001@dialup06.odyssey.apana.org.au>,
simonjw@odyssey.apana.org.au (Simon Wright) wrote:

> In article <leo-2812952132070001@adinstruments.tmx.com.au>, leo@adi.com.au
> (Leo Possajennikov) wrote:
> 
> > If I know the ID of SCSI device (more exactly: bus, ID, LUN) how I can
> > know has this device startup volume or not?
> 
> Leo,
> 
> As far as I know, if it has a valid system file & neccessary system stuff,
> it can be a boot (startup) volume.  The one selected in the "Startup Disk"
> control panel is the current startup volume.
> 
> 

There would appear to be more to it than that. Well, at least FWB toolkit
would indicate so.  It formats disks and will flag a disk as bootable if
the user requests.  Does anyone know how to determine whether a partition
is flagged as bootable or not?  And is that truly required?  (or is FWB
just yanking our chains?)

_____________________________________________________________________
Bill Catambay
Pascal Programmer on Macintosh and Open VMS

              />
             //   The purpose of software engineering  
     (//////[O]>=========================================-
             \\    is to manage complexity, not to create it.
              \>

____________________________________________________________________
Marathon lovers: Check out Devil in a Blue Dress, a 20-level custom map scenario with new story and plots.

The Mac (don't ask me why) requires that the boot sector of a volume
contains certain identifying info for that volume to be bootable, ie. a
startup volume. There are two ways of getting that info onto the boot
sector:
1. Do what FWB (or any similar HD utility) asks and flag the volume as bootable.
or 2. Use the Mac installer to put a System Folder on the volume.

Some HD formatters make all disks bootable, some don't.
If your's doesn't, and you just copy a System Folder onto the volume
without using the Installer, there's a good chance it won't boot.

-- 
Peter Kerr                             bodger
School of Music                        chandler
University of Auckland                 neo-Luddite

In article <bill-0401961213440001@129.197.20.15>,
bill@clavin.lmsc.lockheed.com (Bill Catambay) wrote:

> In article <simonjw-0301960838220001@dialup06.odyssey.apana.org.au>,
> simonjw@odyssey.apana.org.au (Simon Wright) wrote:
> 
> > In article <leo-2812952132070001@adinstruments.tmx.com.au>, leo@adi.com.au
> > (Leo Possajennikov) wrote:
> > 
> > > If I know the ID of SCSI device (more exactly: bus, ID, LUN) how I can
> > > know has this device startup volume or not?
> > 
> > Leo,
> > 
> > As far as I know, if it has a valid system file & neccessary system stuff,
> > it can be a boot (startup) volume.  The one selected in the "Startup Disk"
> > control panel is the current startup volume.
> > 
> > 
> 
> There would appear to be more to it than that. Well, at least FWB toolkit
> would indicate so.  It formats disks and will flag a disk as bootable if
> the user requests.  Does anyone know how to determine whether a partition
> is flagged as bootable or not?  And is that truly required?  (or is FWB
> just yanking our chains?)

If FWB is just yanking your chain then it's in distinguished company, like
Norton Utilities...

To be a startup volume the volume must have boot blocks installed, if it's
not intended as a startup volume then it doesn't need boot blocks...

Have Fun
Martin

-- 
<mcrisp@toursr.tas.gov.au>
If that fails, forward complaints to <sdd@ccd.tas.gov.au>. (i.e. make my ISP pay for not providing)

My employer wasn't consulted so the above may not be their opinion.

Web stuff:
<http://www.tas.gov.au/tourism/>
<http://www.tas.gov.au/tourism/employees/Martin_Crisp/>
<http://www.tas.gov.au/tourism/employees/Martin_Crisp/excel.html>

Windows '95 - Never have so many waited so long (& paid so much) for so little.

bill@clavin.lmsc.lockheed.com (Bill Catambay) wrote:
>In article <simonjw-0301960838220001@dialup06.odyssey.apana.org.au>,
>simonjw@odyssey.apana.org.au (Simon Wright) wrote:
>
>> In article <leo-2812952132070001@adinstruments.tmx.com.au>, leo@adi.com.au
>> (Leo Possajennikov) wrote:
>> 
>> > If I know the ID of SCSI device (more exactly: bus, ID, LUN) how I can
>> > know has this device startup volume or not?
>> 
>> Leo,
>> 
>> As far as I know, if it has a valid system file & neccessary system stuff,
>> it can be a boot (startup) volume.  The one selected in the "Startup Disk"
>> control panel is the current startup volume.
>> 
>> 
>
>There would appear to be more to it than that. Well, at least FWB toolkit
>would indicate so.  It formats disks and will flag a disk as bootable if
>the user requests.  Does anyone know how to determine whether a partition
>is flagged as bootable or not?  And is that truly required?  (or is FWB
>just yanking our chains?)

The Mac looks into the boot blocks to determine if a volume is bootable
(= is a startup volume). Most formatters have an option to set the bootable
flag for any drive/partition. Or you could look at the boot blocks using
Norton Editor. 

Joerg Erdei