Darren J Moffat wrote:
Moinak Ghosh wrote:
Yes but the partition IDs that this project is suggesting be used are explicitly tagged as being for DOS or Windows.


Ok.
Extended partitions is not new to OpenSolaris. PCFS handles it internally. It is convenient to have them supported in OpenSolaris. Most other OSes support it. It is part of the fdisk partitioning scheme. It is as much windows/dos specific as much as a primary fdisk partition is. It wont raise special cases for co-existence with other OSes like Linux. There is no specified limit on the number of logical drives in the extended partition. As long as there is space on the disk and the disk space is covered by the extended partition, you can grow the number of
logical drives.

Hope this clarifies the current concerns. Do post them, if you have more.

Thanks,
Pavan

  Just to clarify more:

A partition tagged with EXTDOS or EXTLBA will contain another partition table. This is called an EBR - Extended Boot Record. This in turn can contain upto 4 slots just like the MBR. So we'd be able to define a partition entry of type Solaris2 in one slot and allocate space to it. The convention is to use the first slot for an actual partition and use the second slot to point to another Extended partition containing another EBR - Russian Dolls, Linked
  List ...

What would happen if there was already a "Linux installation" in the given "Extended" partition, or DOS/Windows was using it for a "drive" ?

Where is the standards document that says that this is acceptable practice ?

Just because you can do this and it appears to work doesn't mean we should do this.

Before I give a '+1' on this project I'd like to know where it is documented that this is allowed or defacto standard and that it doesn't break anything.


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