Amiga HDD Partition just became NDOS

[motorollin]

Are you using a patched scsi.device which allows you to write data beyond the 4GB barrier?

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moto

[motorollin]

It doesn't matter how big they are. What matters is whether they extend more than 4GB in to the drive. You said you are using 0.5GB FFS and 2*3.5GB SFS. That means you're using 7.5GB of the drive. If you haven't taken steps to ensure your scsi.device is able to write beyond the first 4GB of the drive then when it needs to do so, it will start writing to the beginning of the drive instead. That overwrites the partition table, hence the disappearing partitions.

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moto

[motorollin]

Using 3.1, you can install IDEfix to patch scsi.device to allow it to write beyond 4GB. You also need to ensure that any partitions which cross (or are beyond) the 4GB barrier don't use 3.1's FFS - so SFS will be fine.

Once you have done all that, it might be wise to run check4gb as this will ensure that your configuration is safe.

One final point to make is that OS3.9 comes with an updated scsi.device and FFS which does all this for you.

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moto

[motorollin]

Spot on. Just a couple of clarifications:

0. Install SFS in the RDB of the drive
1. I create a small SFS partition for Workbench 3.1 (100megs)
2. Install Workbench 3.1
3. Install IDEFIX
4. Create SFS partitions of any size, including >4gib
5. Run check4gb to ensure everything is ok
6. Fill them with goodies

[motorollin]

I forgot about the loadreset  :oops: I haven't used IDEfix for years though.

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moto

[motorollin]

Colani1200 wrote:
I also have a question regarding this procedure. ;-)
When using IDEfix, do I also have to use the CD filesystem that is included in the package or can I choose a different one (such as AmiCDFS)?

You can use any CDFS you want. The IDEfix patch will still apply to scsi.device and fix >4GB support.

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moto

[motorollin]

taunusand wrote:
I thought HDToolbox always did this.
SFS = Standard File System ??

No, SFS = SmartFileSystem. It's not installed as standard. If you don't install it in the RDB then the Amiga won't be able to see the SFS partitions.

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moto