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va...@icpnet.pl
Jan 4, 2012, 1:16:30 PM1/4/12
to
Hi,
Motivated by the succesful experiences of Hans with qemu I have checked the
newest version of virtualbox 4.1.8. Suprisingly Coherent boots fine .
Important : I have used DELL Optiplex 755 with Core 2 Duo.
One can boot rescue floppy kernel cohat. If one create virtual disk , for example
in vdi format , then being in coherent session one can format this disk with mkfs and then copy files from floppy to this disk. Afterwords one can reboot using cohat0 kernel, with disk being the booting device.
Coherent is very fast, for both kernels, but Optiplex must be used. If used with standard P4 box I have observed bad performance.
Have a fun. dd image crescue.dd must be renamed to crescue.img and raw format floppy image must be set during adding floppy in virtualbox.
Andrzej
Motivated by the succesful experiences of Hans with qemu I have checked the
newest version of virtualbox 4.1.8. Suprisingly Coherent boots fine .
Important : I have used DELL Optiplex 755 with Core 2 Duo.
One can boot rescue floppy kernel cohat. If one create virtual disk , for example
in vdi format , then being in coherent session one can format this disk with mkfs and then copy files from floppy to this disk. Afterwords one can reboot using cohat0 kernel, with disk being the booting device.
Coherent is very fast, for both kernels, but Optiplex must be used. If used with standard P4 box I have observed bad performance.
Have a fun. dd image crescue.dd must be renamed to crescue.img and raw format floppy image must be set during adding floppy in virtualbox.
Andrzej
andrzej Popielewicz
Jan 10, 2012, 4:06:59 AM1/10/12
to
W dniu 2012-01-04 19:16, va...@icpnet.pl pisze:
I have added some more details and screenshoot in
http://www.virtual.box
in forum "Other guests".
Andrzej
http://www.virtual.box
in forum "Other guests".
Andrzej
andrzej Popielewicz
Jan 10, 2012, 4:08:14 AM1/10/12
to
W dniu 2012-01-10 10:06, andrzej Popielewicz pisze:
http://www.virtualbox.org
Andrzej
> W dniu 2012-01-04 19:16, va...@icpnet.pl pisze:
> in forum "Other guests".
> Andrzej
Sorry
> Andrzej
http://www.virtualbox.org
Andrzej
frasc
Jan 12, 2012, 3:45:24 PM1/12/12
to
Hi All,
Based on the results from both Hans and Andrzej, I want to report the
results for some of my own tests.
My PC configuration is: Core i7 950, X58 chipset, SATA disk, 24GB
DDR3, Kubuntu 11.10 amd64
-1- VirtualBox
version 4.1.8r75467
On a 64 bits OS, VirtualBox crashes, whether trying the rescue floppy
or the base installation boot floppy.
However, with a 32bits OS (I've tried both of fedora 16 and debian
sid) both rescue floppy and base install will work. I could even
complete the full installation for 4.10. The resulting performances
were really good. Both VirtualBox and VirtualBox-OSE just worked fine.
I did configure VirtualBox with PIIX3 chipset, no Network, no Sound,
no DVD, no USB, no Serial.
-2- qemu
version1.0.
The results are the same whether compiled for the native 64bits or
32bits (extra flag "-m32"). The installation of Coherent 4.10 will
succeed, but the emulated disk I/O is painfully slow. For instance it
takes about 15 hours to fsck a 100MB root filesystem. Clearly, it is
not usable ads is.
-3- VMware player
version 4.0.1 build-528992
regardless of 64bits or 32bits, vmware player will freeze (or rather
the emulation is not proceeding further) right after Coherent displays
the copyright message.
So, Virtualbox seems as of today the only virtualization solution that
can be used with good performances.
As a side note, in order to run 32bits OSes without reinstalling
everything on my PC, I actually used an emulation solution. Yes, I
know it's a little nuts. However it worked like a charm. So I've been
running either of Fedora 16 or Debian Sid -both 32bits OSes- inside of
virtualbox. Then, I did in turn install virtualbox inside of the guest
OSes. Finally I installed Coherent 4.10 as a guest inside the guest.
Cascading emulations is a recipe for very slow final emulation. But in
that case it works really well, and fast too.
As I know that this solution will be frowned upon, I attempted to run
VirtualBox inside of a 32bits jail. Unfortunately virtualbox was not
happy with the 64bits drivers loaded by the host. I don't really see a
way around that. Maybe I'll dig further and see what else can be done.
Hope that can be useful
Regards
--Frederic
Based on the results from both Hans and Andrzej, I want to report the
results for some of my own tests.
My PC configuration is: Core i7 950, X58 chipset, SATA disk, 24GB
DDR3, Kubuntu 11.10 amd64
-1- VirtualBox
version 4.1.8r75467
On a 64 bits OS, VirtualBox crashes, whether trying the rescue floppy
or the base installation boot floppy.
However, with a 32bits OS (I've tried both of fedora 16 and debian
sid) both rescue floppy and base install will work. I could even
complete the full installation for 4.10. The resulting performances
were really good. Both VirtualBox and VirtualBox-OSE just worked fine.
I did configure VirtualBox with PIIX3 chipset, no Network, no Sound,
no DVD, no USB, no Serial.
-2- qemu
version1.0.
The results are the same whether compiled for the native 64bits or
32bits (extra flag "-m32"). The installation of Coherent 4.10 will
succeed, but the emulated disk I/O is painfully slow. For instance it
takes about 15 hours to fsck a 100MB root filesystem. Clearly, it is
not usable ads is.
-3- VMware player
version 4.0.1 build-528992
regardless of 64bits or 32bits, vmware player will freeze (or rather
the emulation is not proceeding further) right after Coherent displays
the copyright message.
So, Virtualbox seems as of today the only virtualization solution that
can be used with good performances.
As a side note, in order to run 32bits OSes without reinstalling
everything on my PC, I actually used an emulation solution. Yes, I
know it's a little nuts. However it worked like a charm. So I've been
running either of Fedora 16 or Debian Sid -both 32bits OSes- inside of
virtualbox. Then, I did in turn install virtualbox inside of the guest
OSes. Finally I installed Coherent 4.10 as a guest inside the guest.
Cascading emulations is a recipe for very slow final emulation. But in
that case it works really well, and fast too.
As I know that this solution will be frowned upon, I attempted to run
VirtualBox inside of a 32bits jail. Unfortunately virtualbox was not
happy with the 64bits drivers loaded by the host. I don't really see a
way around that. Maybe I'll dig further and see what else can be done.
Hope that can be useful
Regards
--Frederic
Andrzej Popielewicz
Jan 15, 2012, 5:24:56 AM1/15/12
to
frasc pisze:
easy backups of virtual floppy or virtual harddrive.
Andrzej
> Hi All,
> Based on the results from both Hans and Andrzej, I want to report the
> results for some of my own tests.
The beautiful thing about virtual solution is , that it allows for very
> Based on the results from both Hans and Andrzej, I want to report the
> results for some of my own tests.
easy backups of virtual floppy or virtual harddrive.
Andrzej
mikey
Feb 20, 2012, 3:24:52 AM2/20/12
to
Looks like Virtual Box and QEMU have re-vitalised comp.os.coherent
again !
Many thanks to Andrzej Popielewicz who had soldiered on thru the
many years
in providing news and updates on Coherent - was a Lone Voice in the
Wilderness!
I add my comment that I have tried and done most of what you all have
written about
the use of Virtual Box to do Coherent ( in my case, 3.2.1A and
4.2.10 ).
Very good experience, next, to when I first successfully installed
3.1.0 with 5.25 floppies !
Am trying to preserve the images of the 5.25 floppies... some are
showing CRC errors.
mikey.
andrzej Popielewicz
Apr 26, 2012, 2:19:05 AM4/26/12
to
W dniu 2012-01-04 19:16, va...@icpnet.pl pisze:
I was using VirtualBox in XP on Core 2 Duo system. One of the settings
in BIOS allows for setting virtualization support. In my case I have it
switched off. Roy has made experience , that if switched on the
performance of HD IO suffers. So keep it OFF. It is really amazing,
probably switching it on makes CPU behaviour too complicated for
Coherent kernel.
Andrzej
Roy
Apr 26, 2012, 4:10:09 AM4/26/12
to
need to disable it in BIOS.
>
> Andrzej
andrzej Popielewicz
Apr 26, 2012, 4:39:45 AM4/26/12
to
W dniu 2012-04-26 10:10, Roy pisze:
acceleration tab (in system)is not active, so I cannot switch it on or
off. If You mean screen 3d acceleration it is settable and I had it
always switched off.
BTW , do You have virtualization support in BIOS switched on ?
Andrzej
> On Apr 26, 2:19 pm, andrzej Popielewicz<va...@icpnet.pl> wrote:
>> W dniu 2012-01-04 19:16, va...@icpnet.pl pisze:
>>
>
>> W dniu 2012-01-04 19:16, va...@icpnet.pl pisze:
>>
>
> Removing the check mark in VM settings acceleration tab is enough, no
> need to disable it in BIOS.
>
OK, so it was misunderstanding. In my case (version 4.1.10) VM
> need to disable it in BIOS.
>
acceleration tab (in system)is not active, so I cannot switch it on or
off. If You mean screen 3d acceleration it is settable and I had it
always switched off.
BTW , do You have virtualization support in BIOS switched on ?
Andrzej
Roy
Apr 26, 2012, 7:15:38 AM4/26/12
to
On Apr 26, 4:39 pm, andrzej Popielewicz <va...@icpnet.pl> wrote:
> W dniu 2012-04-26 10:10, Roy pisze:
>
> > On Apr 26, 2:19 pm, andrzej Popielewicz<va...@icpnet.pl> wrote:
> >> W dniu 2012-01-04 19:16, va...@icpnet.pl pisze:
>
> > Removing the check mark in VM settings acceleration tab is enough, no
> > need to disable it in BIOS.
>
> OK, so it was misunderstanding. In my case (version 4.1.10) VM
> acceleration tab (in system)is not active, so I cannot switch it on or
> off. If You mean screen 3d acceleration it is settable and I had it
> always switched off.
>
If you disabled virtualization support in BIOS, acceleration tab in VM
> W dniu 2012-04-26 10:10, Roy pisze:
>
> > On Apr 26, 2:19 pm, andrzej Popielewicz<va...@icpnet.pl> wrote:
> >> W dniu 2012-01-04 19:16, va...@icpnet.pl pisze:
>
> > Removing the check mark in VM settings acceleration tab is enough, no
> > need to disable it in BIOS.
>
> OK, so it was misunderstanding. In my case (version 4.1.10) VM
> acceleration tab (in system)is not active, so I cannot switch it on or
> off. If You mean screen 3d acceleration it is settable and I had it
> always switched off.
>
setting will not be accessible and virtualization acceleration will be
disabled.
> BTW , do You have virtualization support in BIOS switched on ?
>
> Andrzej
Andrzej Popielewicz
Apr 26, 2012, 3:20:58 PM4/26/12
to
Roy pisze:
> On Apr 26, 4:39 pm, andrzej Popielewicz <va...@icpnet.pl> wrote:
>> W dniu 2012-04-26 10:10, Roy pisze:
> On Apr 26, 4:39 pm, andrzej Popielewicz <va...@icpnet.pl> wrote:
>> W dniu 2012-04-26 10:10, Roy pisze:
> If you disabled virtualization support in BIOS, acceleration tab in VM
> setting will not be accessible and virtualization acceleration will be
> disabled.
I did not disable it, it was default. In some way I can say I was lucky.
> setting will not be accessible and virtualization acceleration will be
> disabled.
Wow, it is clever. Now it seems we now know how to set it all correctly.
Question is why it does disturb Coherent and instead to accelerate it
makes Coherent slower .. let us leave it to developers of virtualbox.
>
>> BTW , do You have virtualization support in BIOS switched on ?
> Yes I have it on, for other VM guests.
Did You notice the difference for Linux for example ?
>> BTW , do You have virtualization support in BIOS switched on ?
> Yes I have it on, for other VM guests.
Andrzej
Roy
Apr 26, 2012, 7:24:55 PM4/26/12
to
The most important thing is, I can run AMD64 guest in 32bit OS host
too.
>
> Andrzej
andrzej Popielewicz
Apr 27, 2012, 1:49:03 AM4/27/12
to
W dniu 2012-04-27 01:24, Roy pisze:
I have to check it out. And then run Coherent in Virtual Box running in
64 bit virtual machine.
Andrzej
> The most important thing is, I can run AMD64 guest in 32bit OS host
> too.
Wow,
> too.
I have to check it out. And then run Coherent in Virtual Box running in
64 bit virtual machine.
Andrzej
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