Re: [Freedos-user] Installing on an iMac 2011 (with good reason)

[Liam Proven via Freedos-user]

On Wed, 4 Oct 2023 at 19:59, ashembers via Freedos-user
 wrote:
>
> Hello,
>
> I have been trying to install 1.3 on an iMac 2011

I *think* Intel Macs only fake BIOS compatibility for booting from
removable media. Once the OS is on the fixed disk, I'd expect it not
to work.

If the fans are on full that means you've not enabled power
management. DOS runs the main CPU at full speed all the time unless
told to do something else.

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Re: [Freedos-user] Installing on an iMac 2011 (with good reason)

[Michał Dec via Freedos-user]

Hello,

>the machine running hot

Maybe try running FDAPM to reduce CPU usage once you're in the shell? I 
remember installing FreeDOS on a Toshiba A660 with an i7 onboard, but I 
don't recall that kind of issue.


>is this normal behavior for installing FD to an SSD?

No. FreeDOS can be installed on flash memory no problem. I'm using it on 
a CF card and it's doing good.


>general errors with FAT

From my experience if you choose FAT32 filesystem for the job, you need 
to make sure it exists on a disk with a MBR partition table, and the 
designated partition must have a type equal to 0x0C. FreeDOS installer 
usually makes sure that these conditions are met before installation 
although I would not trust it to align the first partition to start at 
the 1st MiB for best mileage. That's why I leave the partitioning and 
formatting to fdisk and mkfs.vfat on Linux. GPT partition table will 
also work, as long as you make a hybrid MBR table and provide a BIOS 
boot partition.


If all of this is not an issue, maybe the drive itself is in bad 
condition? Have you checked SMART metrics?


Best regards,

Michał

W dniu 4.10.2023 o 20:57, ashembers via Freedos-user pisze:

Hello,

I have been trying to install 1.3 on an iMac 2011, which seems dumb on 
the face of it, but I noticed that it has Intel-based sound that looks 
to be SBEM compatible, so I figured that it would actually be a good 
use of aging hardware. There were 2 problems doing this: I saw that 
the cooling fans were running high & the unit was indeed hot - 
regardless of whether I was trying to install or just running FD off 
disc. Also, when I installed, it seemed slow but I read that sometimes 
it can take a while so I left it run all night. It ran into errors 
like these:


Run chkdsk: Bad FAT index: #x
Run chkdsk: Bad FAT value: #x
Run chkdsk: Bad FAT index: #x
Run chkdsk: Bad FAT value: #x
Fatal error: error code #101, unspecified error with "gzip.exe"

I attempted formatting the drive first (running FD as a Live CD) with 
a full format, but that made no difference.


My questions are: is the iMac architecture that lame in this context, 
or is this normal behavior for installing FD to an SSD? I had not 
tried installing to a platter drive yet.


Thanks for your thoughts,
Dan


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